/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/hard2_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:35:32,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:35:32,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:35:32,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:35:32,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:35:32,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:35:32,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:35:32,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:35:32,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:35:32,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:35:32,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:35:32,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:35:32,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:35:32,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:35:32,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:35:32,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:35:32,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:35:32,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:35:32,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:35:32,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:35:32,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:35:32,102 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:35:32,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:35:32,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:35:32,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:35:32,105 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:35:32,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:35:32,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:35:32,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:35:32,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:35:32,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:35:32,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:35:32,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:35:32,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:35:32,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:35:32,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:35:32,106 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:35:32,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:35:32,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:35:32,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:35:32,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:35:32,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:35:32,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:35:32,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:35:32,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:35:32,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:35:32,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:35:32,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:35:32,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:35:32,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:35:32,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:35:32,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:35:32,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:35:32,375 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:35:32,377 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:35:32,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c [2021-05-02 15:35:32,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061e95727/0cc2b2bae6b54e5cb59eae8a563409eb/FLAGfdfa457c6 [2021-05-02 15:35:32,809 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:35:32,810 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c [2021-05-02 15:35:32,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061e95727/0cc2b2bae6b54e5cb59eae8a563409eb/FLAGfdfa457c6 [2021-05-02 15:35:33,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061e95727/0cc2b2bae6b54e5cb59eae8a563409eb [2021-05-02 15:35:33,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:35:33,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:35:33,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:35:33,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:35:33,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:35:33,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:35:33" (1/1) ... [2021-05-02 15:35:33,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2be31950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:33, skipping insertion in model container [2021-05-02 15:35:33,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:35:33" (1/1) ... [2021-05-02 15:35:33,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:35:33,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:35:33,322 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/hard2_unwindbound10.c[526,539] [2021-05-02 15:35:33,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:35:33,338 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:35:33,346 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/hard2_unwindbound10.c[526,539] [2021-05-02 15:35:33,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:35:33,360 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:35:33,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:33 WrapperNode [2021-05-02 15:35:33,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:35:33,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:35:33,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:35:33,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:35:33,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:33" (1/1) ... [2021-05-02 15:35:33,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:33" (1/1) ... [2021-05-02 15:35:33,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:33" (1/1) ... [2021-05-02 15:35:33,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:33" (1/1) ... [2021-05-02 15:35:33,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:33" (1/1) ... [2021-05-02 15:35:33,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:33" (1/1) ... [2021-05-02 15:35:33,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:33" (1/1) ... [2021-05-02 15:35:33,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:35:33,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:35:33,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:35:33,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:35:33,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:35:33,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:35:33,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:35:33,471 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:35:33,471 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:35:33,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:35:33,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:35:33,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:35:33,471 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:35:33,472 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:35:33,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:35:33,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:35:33,472 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:35:33,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:35:33,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:35:33,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:35:33,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:35:33,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:35:33,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:35:33,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:35:33,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:35:33,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:35:33,704 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:35:33,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:35:33 BoogieIcfgContainer [2021-05-02 15:35:33,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:35:33,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:35:33,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:35:33,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:35:33,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:35:33" (1/3) ... [2021-05-02 15:35:33,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3189e7d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:35:33, skipping insertion in model container [2021-05-02 15:35:33,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:33" (2/3) ... [2021-05-02 15:35:33,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3189e7d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:35:33, skipping insertion in model container [2021-05-02 15:35:33,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:35:33" (3/3) ... [2021-05-02 15:35:33,709 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.c [2021-05-02 15:35:33,726 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:35:33,729 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:35:33,740 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:35:33,757 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:35:33,757 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:35:33,757 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:35:33,757 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:35:33,757 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:35:33,757 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:35:33,757 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:35:33,757 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:35:33,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:35:33,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:35:33,774 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:33,775 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:35:33,775 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:33,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times [2021-05-02 15:35:33,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:33,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741206465] [2021-05-02 15:35:33,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:33,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:35:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:35:33,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:33,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741206465] [2021-05-02 15:35:33,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741206465] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:35:33,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:35:33,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:35:33,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227807818] [2021-05-02 15:35:33,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:35:33,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:34,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:35:34,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:35:34,011 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:35:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:34,185 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2021-05-02 15:35:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:35:34,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 15:35:34,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:34,192 INFO L225 Difference]: With dead ends: 57 [2021-05-02 15:35:34,192 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:35:34,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:35:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:35:34,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 15:35:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:35:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-05-02 15:35:34,230 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2021-05-02 15:35:34,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:34,231 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-05-02 15:35:34,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:35:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-05-02 15:35:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:35:34,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:34,234 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:35:34,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:35:34,235 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:34,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times [2021-05-02 15:35:34,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:34,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94345267] [2021-05-02 15:35:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:34,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:35:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:35:34,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:34,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94345267] [2021-05-02 15:35:34,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94345267] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:35:34,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:35:34,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:35:34,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192469428] [2021-05-02 15:35:34,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:35:34,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:34,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:35:34,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:35:34,388 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:35:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:34,745 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-05-02 15:35:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:35:34,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 15:35:34,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:34,747 INFO L225 Difference]: With dead ends: 41 [2021-05-02 15:35:34,747 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 15:35:34,748 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 261.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:35:34,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 15:35:34,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-05-02 15:35:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:35:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-02 15:35:34,754 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2021-05-02 15:35:34,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:34,755 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-02 15:35:34,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:35:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-02 15:35:34,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 15:35:34,755 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:34,755 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:35:34,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:35:34,756 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:34,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:34,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times [2021-05-02 15:35:34,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:34,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587139788] [2021-05-02 15:35:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:34,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:35:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:35:34,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:34,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587139788] [2021-05-02 15:35:34,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587139788] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:35:34,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:35:34,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:35:34,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214594229] [2021-05-02 15:35:34,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:35:34,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:34,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:35:34,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:35:34,848 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:35:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:35,045 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2021-05-02 15:35:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:35:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 15:35:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:35,048 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:35:35,048 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:35:35,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:35:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:35:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:35:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:35:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 15:35:35,059 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2021-05-02 15:35:35,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:35,060 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 15:35:35,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:35:35,060 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 15:35:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 15:35:35,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:35,060 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:35:35,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:35:35,061 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:35,061 INFO L82 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times [2021-05-02 15:35:35,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:35,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833462650] [2021-05-02 15:35:35,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:35,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:35:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:35,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-02 15:35:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:35:35,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:35,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833462650] [2021-05-02 15:35:35,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833462650] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:35:35,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:35:35,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:35:35,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887249736] [2021-05-02 15:35:35,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:35:35,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:35,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:35:35,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:35:35,184 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:35:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:35,446 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-02 15:35:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:35:35,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 15:35:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:35,447 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:35:35,448 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 15:35:35,448 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:35:35,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 15:35:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-05-02 15:35:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:35:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2021-05-02 15:35:35,455 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2021-05-02 15:35:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:35,455 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2021-05-02 15:35:35,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:35:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2021-05-02 15:35:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 15:35:35,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:35,456 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:35:35,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 15:35:35,456 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:35,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:35,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times [2021-05-02 15:35:35,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:35,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145904367] [2021-05-02 15:35:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:35,464 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:35,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855091027] [2021-05-02 15:35:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:35:35,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:35:35,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:35,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145904367] [2021-05-02 15:35:35,659 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:35,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855091027] [2021-05-02 15:35:35,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855091027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:35,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:35,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:35:35,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700314609] [2021-05-02 15:35:35,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:35:35,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:35,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:35:35,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:35:35,661 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:35:35,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:35,820 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2021-05-02 15:35:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:35:35,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-05-02 15:35:35,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:35,823 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:35:35,824 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 15:35:35,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:35:35,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 15:35:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 15:35:35,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:35:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-05-02 15:35:35,843 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 22 [2021-05-02 15:35:35,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:35,843 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-05-02 15:35:35,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:35:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-05-02 15:35:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 15:35:35,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:35,847 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] [2021-05-02 15:35:36,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:36,061 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:36,062 INFO L82 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 1 times [2021-05-02 15:35:36,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:36,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988372252] [2021-05-02 15:35:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:36,069 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:36,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99072058] [2021-05-02 15:35:36,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:36,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:35:36,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:36,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:36,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:36,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:36,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:36,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:36,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:36,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:36,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:35:36,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:36,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988372252] [2021-05-02 15:35:36,262 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:36,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99072058] [2021-05-02 15:35:36,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99072058] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:35:36,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:35:36,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:35:36,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387890998] [2021-05-02 15:35:36,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:35:36,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:36,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:35:36,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:35:36,264 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:35:36,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:36,294 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-05-02 15:35:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:35:36,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 15:35:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:36,295 INFO L225 Difference]: With dead ends: 70 [2021-05-02 15:35:36,295 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 15:35:36,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:35:36,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 15:35:36,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-05-02 15:35:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:35:36,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-05-02 15:35:36,311 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2021-05-02 15:35:36,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:36,311 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-05-02 15:35:36,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:35:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-05-02 15:35:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 15:35:36,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:36,312 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] [2021-05-02 15:35:36,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:36,525 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:36,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:36,526 INFO L82 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 1 times [2021-05-02 15:35:36,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:36,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840933135] [2021-05-02 15:35:36,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:36,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:36,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701265247] [2021-05-02 15:35:36,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:36,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:35:36,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 15:35:36,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:36,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840933135] [2021-05-02 15:35:36,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:36,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701265247] [2021-05-02 15:35:36,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701265247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:36,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:36,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:35:36,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316802276] [2021-05-02 15:35:36,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:35:36,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:36,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:35:36,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:35:36,675 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:35:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:36,769 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-05-02 15:35:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:35:36,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 15:35:36,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:36,771 INFO L225 Difference]: With dead ends: 76 [2021-05-02 15:35:36,771 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 15:35:36,771 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:35:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 15:35:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 15:35:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:35:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-05-02 15:35:36,777 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2021-05-02 15:35:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:36,777 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-05-02 15:35:36,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:35:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-05-02 15:35:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 15:35:36,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:36,778 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:35:36,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:36,995 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:36,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 1 times [2021-05-02 15:35:36,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:36,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63019541] [2021-05-02 15:35:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:37,001 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:37,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875937385] [2021-05-02 15:35:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:37,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:35:37,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:37,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:37,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:37,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:37,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:37,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:37,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:37,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:37,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-05-02 15:35:37,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:37,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63019541] [2021-05-02 15:35:37,206 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:37,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875937385] [2021-05-02 15:35:37,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875937385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:37,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:37,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:35:37,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842299839] [2021-05-02 15:35:37,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:35:37,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:37,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:35:37,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:35:37,210 INFO L87 Difference]: Start difference. First operand 63 states and 76 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), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:35:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:37,245 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2021-05-02 15:35:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:35:37,246 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), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-02 15:35:37,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:37,249 INFO L225 Difference]: With dead ends: 90 [2021-05-02 15:35:37,249 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 15:35:37,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:35:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 15:35:37,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 15:35:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:35:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-05-02 15:35:37,257 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2021-05-02 15:35:37,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:37,257 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-05-02 15:35:37,257 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), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:35:37,257 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-05-02 15:35:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 15:35:37,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:37,258 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] [2021-05-02 15:35:37,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:37,473 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:37,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:37,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1057559728, now seen corresponding path program 1 times [2021-05-02 15:35:37,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:37,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295103556] [2021-05-02 15:35:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:37,479 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:37,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628991457] [2021-05-02 15:35:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:37,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:35:37,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:35:37,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:37,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295103556] [2021-05-02 15:35:37,643 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:37,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628991457] [2021-05-02 15:35:37,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628991457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:37,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:37,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:35:37,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908812893] [2021-05-02 15:35:37,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:35:37,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:37,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:35:37,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:35:37,645 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:35:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:37,790 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2021-05-02 15:35:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:35:37,790 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-02 15:35:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:37,791 INFO L225 Difference]: With dead ends: 117 [2021-05-02 15:35:37,791 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 15:35:37,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:35:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 15:35:37,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-05-02 15:35:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 54 states have internal predecessors, (63), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:35:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-05-02 15:35:37,807 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 40 [2021-05-02 15:35:37,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:37,807 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-05-02 15:35:37,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:35:37,807 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-05-02 15:35:37,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 15:35:37,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:37,809 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:35:38,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:38,027 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:38,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:38,028 INFO L82 PathProgramCache]: Analyzing trace with hash 529029787, now seen corresponding path program 1 times [2021-05-02 15:35:38,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:38,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991736584] [2021-05-02 15:35:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:38,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:38,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157841995] [2021-05-02 15:35:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:38,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:35:38,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:38,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-02 15:35:38,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:38,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991736584] [2021-05-02 15:35:38,176 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:38,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157841995] [2021-05-02 15:35:38,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157841995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:38,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:38,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:35:38,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059682399] [2021-05-02 15:35:38,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:35:38,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:38,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:35:38,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:35:38,178 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:35:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:38,207 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2021-05-02 15:35:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:35:38,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-02 15:35:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:38,209 INFO L225 Difference]: With dead ends: 104 [2021-05-02 15:35:38,209 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 15:35:38,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:35:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 15:35:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-02 15:35:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 60 states have internal predecessors, (68), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:35:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-05-02 15:35:38,217 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 53 [2021-05-02 15:35:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:38,217 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-05-02 15:35:38,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:35:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-05-02 15:35:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:35:38,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:38,218 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] [2021-05-02 15:35:38,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:38,431 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:38,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:38,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1864650262, now seen corresponding path program 2 times [2021-05-02 15:35:38,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:38,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143356509] [2021-05-02 15:35:38,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:38,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:38,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128474196] [2021-05-02 15:35:38,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:38,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:35:38,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:35:38,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:35:38,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:38,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-02 15:35:38,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:38,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143356509] [2021-05-02 15:35:38,580 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:38,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128474196] [2021-05-02 15:35:38,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128474196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:38,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:38,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:35:38,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937857718] [2021-05-02 15:35:38,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:35:38,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:38,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:35:38,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:35:38,582 INFO L87 Difference]: Start difference. First operand 91 states and 106 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), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:35:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:38,625 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2021-05-02 15:35:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:35:38,626 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), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-05-02 15:35:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:38,629 INFO L225 Difference]: With dead ends: 118 [2021-05-02 15:35:38,629 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 15:35:38,630 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:35:38,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 15:35:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 15:35:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 62 states have internal predecessors, (70), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:35:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2021-05-02 15:35:38,643 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 55 [2021-05-02 15:35:38,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:38,643 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2021-05-02 15:35:38,643 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), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:35:38,644 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2021-05-02 15:35:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 15:35:38,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:38,646 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] [2021-05-02 15:35:38,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:38,853 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:38,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:38,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1879054090, now seen corresponding path program 2 times [2021-05-02 15:35:38,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:38,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124934985] [2021-05-02 15:35:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:38,858 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:38,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254718813] [2021-05-02 15:35:38,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:38,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:35:38,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:35:38,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 15:35:38,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 15:35:39,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:39,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124934985] [2021-05-02 15:35:39,079 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:39,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254718813] [2021-05-02 15:35:39,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254718813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:39,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:39,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:35:39,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149892826] [2021-05-02 15:35:39,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:35:39,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:39,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:35:39,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:35:39,080 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:35:39,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:39,308 INFO L93 Difference]: Finished difference Result 153 states and 198 transitions. [2021-05-02 15:35:39,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:35:39,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2021-05-02 15:35:39,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:39,314 INFO L225 Difference]: With dead ends: 153 [2021-05-02 15:35:39,314 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 15:35:39,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:35:39,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 15:35:39,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2021-05-02 15:35:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 76 states have internal predecessors, (87), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 15:35:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2021-05-02 15:35:39,323 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 58 [2021-05-02 15:35:39,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:39,324 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2021-05-02 15:35:39,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:35:39,324 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2021-05-02 15:35:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 15:35:39,324 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:39,324 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] [2021-05-02 15:35:39,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 15:35:39,541 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:39,541 INFO L82 PathProgramCache]: Analyzing trace with hash -43330764, now seen corresponding path program 1 times [2021-05-02 15:35:39,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:39,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684031288] [2021-05-02 15:35:39,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:39,548 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:39,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876305351] [2021-05-02 15:35:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:39,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:35:39,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:39,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:35:39,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:39,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684031288] [2021-05-02 15:35:39,690 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:39,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876305351] [2021-05-02 15:35:39,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876305351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:39,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:39,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:35:39,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177739074] [2021-05-02 15:35:39,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:35:39,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:39,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:35:39,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:35:39,693 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:35:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:39,753 INFO L93 Difference]: Finished difference Result 145 states and 167 transitions. [2021-05-02 15:35:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:35:39,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 62 [2021-05-02 15:35:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:39,754 INFO L225 Difference]: With dead ends: 145 [2021-05-02 15:35:39,754 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 15:35:39,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:35:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 15:35:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-05-02 15:35:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 88 states have internal predecessors, (99), 27 states have call successors, (27), 18 states have call predecessors, (27), 17 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 15:35:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2021-05-02 15:35:39,764 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 62 [2021-05-02 15:35:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:39,765 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2021-05-02 15:35:39,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:35:39,765 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2021-05-02 15:35:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 15:35:39,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:39,765 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] [2021-05-02 15:35:39,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:39,981 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:39,981 INFO L82 PathProgramCache]: Analyzing trace with hash -41602886, now seen corresponding path program 1 times [2021-05-02 15:35:39,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:39,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467247179] [2021-05-02 15:35:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:39,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:39,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114537124] [2021-05-02 15:35:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:40,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 15:35:40,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 15:35:40,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467247179] [2021-05-02 15:35:40,213 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114537124] [2021-05-02 15:35:40,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114537124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:40,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:40,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:35:40,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839455200] [2021-05-02 15:35:40,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:35:40,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:40,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:35:40,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:35:40,215 INFO L87 Difference]: Start difference. First operand 131 states and 151 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 15:35:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:40,355 INFO L93 Difference]: Finished difference Result 145 states and 170 transitions. [2021-05-02 15:35:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:35:40,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-02 15:35:40,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:40,357 INFO L225 Difference]: With dead ends: 145 [2021-05-02 15:35:40,357 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 15:35:40,357 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:35:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 15:35:40,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-05-02 15:35:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 95 states have internal predecessors, (109), 29 states have call successors, (29), 19 states have call predecessors, (29), 18 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 15:35:40,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 165 transitions. [2021-05-02 15:35:40,364 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 165 transitions. Word has length 62 [2021-05-02 15:35:40,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:40,364 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 165 transitions. [2021-05-02 15:35:40,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 15:35:40,365 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 165 transitions. [2021-05-02 15:35:40,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 15:35:40,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:40,365 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 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] [2021-05-02 15:35:40,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:40,583 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:40,584 INFO L82 PathProgramCache]: Analyzing trace with hash -378736343, now seen corresponding path program 2 times [2021-05-02 15:35:40,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:40,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091782317] [2021-05-02 15:35:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:40,590 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:40,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802630701] [2021-05-02 15:35:40,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:40,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:35:40,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:35:40,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 15:35:40,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-02 15:35:40,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:40,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091782317] [2021-05-02 15:35:40,765 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:40,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802630701] [2021-05-02 15:35:40,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802630701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:40,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:40,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:35:40,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505520915] [2021-05-02 15:35:40,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:35:40,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:40,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:35:40,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:35:40,766 INFO L87 Difference]: Start difference. First operand 141 states and 165 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:35:40,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:40,899 INFO L93 Difference]: Finished difference Result 168 states and 200 transitions. [2021-05-02 15:35:40,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:35:40,900 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 67 [2021-05-02 15:35:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:40,902 INFO L225 Difference]: With dead ends: 168 [2021-05-02 15:35:40,902 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 15:35:40,903 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:35:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 15:35:40,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-02 15:35:40,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 96 states have internal predecessors, (106), 30 states have call successors, (30), 20 states have call predecessors, (30), 19 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 15:35:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 163 transitions. [2021-05-02 15:35:40,914 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 163 transitions. Word has length 67 [2021-05-02 15:35:40,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:40,914 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 163 transitions. [2021-05-02 15:35:40,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:35:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 163 transitions. [2021-05-02 15:35:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 15:35:40,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:40,915 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] [2021-05-02 15:35:41,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 15:35:41,129 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:41,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:41,129 INFO L82 PathProgramCache]: Analyzing trace with hash 73149133, now seen corresponding path program 1 times [2021-05-02 15:35:41,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:41,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111169716] [2021-05-02 15:35:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:41,134 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:41,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643156121] [2021-05-02 15:35:41,135 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 [2021-05-02 15:35:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:35:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 15:35:41,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 15:35:41,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:41,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111169716] [2021-05-02 15:35:41,350 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:41,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643156121] [2021-05-02 15:35:41,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643156121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:41,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:41,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:35:41,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062937610] [2021-05-02 15:35:41,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:35:41,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:41,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:35:41,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:35:41,351 INFO L87 Difference]: Start difference. First operand 143 states and 163 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:35:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:41,482 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2021-05-02 15:35:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:35:41,483 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 73 [2021-05-02 15:35:41,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:41,483 INFO L225 Difference]: With dead ends: 149 [2021-05-02 15:35:41,484 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 15:35:41,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:35:41,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 15:35:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-02 15:35:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 74 states have (on average 1.162162162162162) internal successors, (86), 76 states have internal predecessors, (86), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 15:35:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-05-02 15:35:41,489 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 73 [2021-05-02 15:35:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:41,489 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-05-02 15:35:41,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:35:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-05-02 15:35:41,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 15:35:41,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:41,490 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] [2021-05-02 15:35:41,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:35:41,702 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:41,703 INFO L82 PathProgramCache]: Analyzing trace with hash 469209008, now seen corresponding path program 3 times [2021-05-02 15:35:41,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:41,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716807175] [2021-05-02 15:35:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:41,707 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:41,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058481023] [2021-05-02 15:35:41,707 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:41,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 15:35:41,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:35:41,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:35:41,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:41,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-02 15:35:41,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:41,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716807175] [2021-05-02 15:35:41,846 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:41,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058481023] [2021-05-02 15:35:41,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058481023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:41,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:41,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:35:41,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741033746] [2021-05-02 15:35:41,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:35:41,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:41,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:35:41,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:35:41,848 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 15:35:41,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:41,903 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2021-05-02 15:35:41,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:35:41,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-02 15:35:41,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:41,904 INFO L225 Difference]: With dead ends: 142 [2021-05-02 15:35:41,904 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 15:35:41,905 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:35:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 15:35:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-02 15:35:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 78 states have internal predecessors, (88), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 15:35:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 136 transitions. [2021-05-02 15:35:41,911 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 136 transitions. Word has length 73 [2021-05-02 15:35:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:41,911 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 136 transitions. [2021-05-02 15:35:41,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 15:35:41,911 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 136 transitions. [2021-05-02 15:35:41,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 15:35:41,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:41,912 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] [2021-05-02 15:35:42,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 15:35:42,128 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:42,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:42,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1813973276, now seen corresponding path program 3 times [2021-05-02 15:35:42,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:42,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609082740] [2021-05-02 15:35:42,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:42,134 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:42,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352977800] [2021-05-02 15:35:42,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:42,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:35:42,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:35:42,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 15:35:42,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:42,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 95 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-05-02 15:35:42,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:42,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609082740] [2021-05-02 15:35:42,399 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:42,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352977800] [2021-05-02 15:35:42,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352977800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:42,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:42,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:35:42,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038411476] [2021-05-02 15:35:42,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:35:42,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:35:42,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:35:42,401 INFO L87 Difference]: Start difference. First operand 117 states and 136 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:35:42,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:42,603 INFO L93 Difference]: Finished difference Result 149 states and 178 transitions. [2021-05-02 15:35:42,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:35:42,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 76 [2021-05-02 15:35:42,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:42,604 INFO L225 Difference]: With dead ends: 149 [2021-05-02 15:35:42,604 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 15:35:42,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:35:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 15:35:42,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2021-05-02 15:35:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 88 states have internal predecessors, (101), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 15:35:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2021-05-02 15:35:42,614 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 76 [2021-05-02 15:35:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:42,615 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2021-05-02 15:35:42,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:35:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2021-05-02 15:35:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 15:35:42,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:42,616 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] [2021-05-02 15:35:42,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:42,829 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:42,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1997631578, now seen corresponding path program 2 times [2021-05-02 15:35:42,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:42,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397719960] [2021-05-02 15:35:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:42,834 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:42,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042720161] [2021-05-02 15:35:42,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:42,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:35:42,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:35:42,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 15:35:42,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:42,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:42,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:43,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 15:35:43,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:43,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397719960] [2021-05-02 15:35:43,010 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:43,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042720161] [2021-05-02 15:35:43,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042720161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:43,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:43,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:35:43,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650341143] [2021-05-02 15:35:43,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:35:43,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:43,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:35:43,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:35:43,012 INFO L87 Difference]: Start difference. First operand 132 states and 157 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 15:35:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:43,086 INFO L93 Difference]: Finished difference Result 174 states and 200 transitions. [2021-05-02 15:35:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:35:43,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-02 15:35:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:43,087 INFO L225 Difference]: With dead ends: 174 [2021-05-02 15:35:43,088 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 15:35:43,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:35:43,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 15:35:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-02 15:35:43,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 108 states have internal predecessors, (121), 32 states have call successors, (32), 22 states have call predecessors, (32), 21 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 15:35:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 183 transitions. [2021-05-02 15:35:43,097 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 183 transitions. Word has length 80 [2021-05-02 15:35:43,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:43,097 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 183 transitions. [2021-05-02 15:35:43,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 15:35:43,097 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 183 transitions. [2021-05-02 15:35:43,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 15:35:43,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:43,098 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] [2021-05-02 15:35:43,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:43,313 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:43,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1999359456, now seen corresponding path program 3 times [2021-05-02 15:35:43,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:43,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857479198] [2021-05-02 15:35:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:43,318 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:43,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668483685] [2021-05-02 15:35:43,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:43,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:35:43,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:35:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 15:35:43,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:43,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-02 15:35:43,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:35:43,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857479198] [2021-05-02 15:35:43,558 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:35:43,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668483685] [2021-05-02 15:35:43,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668483685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:35:43,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:35:43,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:35:43,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288511001] [2021-05-02 15:35:43,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:35:43,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:35:43,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:35:43,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:35:43,559 INFO L87 Difference]: Start difference. First operand 160 states and 183 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:35:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:35:43,702 INFO L93 Difference]: Finished difference Result 178 states and 205 transitions. [2021-05-02 15:35:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:35:43,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 80 [2021-05-02 15:35:43,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:35:43,704 INFO L225 Difference]: With dead ends: 178 [2021-05-02 15:35:43,705 INFO L226 Difference]: Without dead ends: 176 [2021-05-02 15:35:43,705 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:35:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-02 15:35:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2021-05-02 15:35:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 116 states have (on average 1.1551724137931034) internal successors, (134), 118 states have internal predecessors, (134), 34 states have call successors, (34), 24 states have call predecessors, (34), 23 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:35:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 200 transitions. [2021-05-02 15:35:43,716 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 200 transitions. Word has length 80 [2021-05-02 15:35:43,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:35:43,716 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 200 transitions. [2021-05-02 15:35:43,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:35:43,717 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 200 transitions. [2021-05-02 15:35:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 15:35:43,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:35:43,717 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2021-05-02 15:35:43,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:43,933 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:35:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:35:43,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1321690173, now seen corresponding path program 4 times [2021-05-02 15:35:43,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:35:43,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7800854] [2021-05-02 15:35:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:35:43,940 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:35:43,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932480359] [2021-05-02 15:35:43,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:35:43,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:35:43,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:35:43,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 15:35:43,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:35:54,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:54,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:54,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:54,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:54,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:35:54,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:36:00,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:36:00,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:36:00,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:36:00,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:36:00,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:36:00,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:36:03,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:36:03,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:36:03,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:36:17,915 WARN L205 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 15:36:17,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:36:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 43 proven. 71 refuted. 8 times theorem prover too weak. 188 trivial. 0 not checked. [2021-05-02 15:36:18,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:36:18,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7800854] [2021-05-02 15:36:18,002 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:36:18,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932480359] [2021-05-02 15:36:18,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932480359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:36:18,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:36:18,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:36:18,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282225743] [2021-05-02 15:36:18,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:36:18,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:36:18,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:36:18,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=111, Unknown=12, NotChecked=0, Total=156 [2021-05-02 15:36:18,003 INFO L87 Difference]: Start difference. First operand 174 states and 200 transitions. Second operand has 13 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 15:36:48,123 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 19 [2021-05-02 15:37:02,766 WARN L205 SmtUtils]: Spent 4.20 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 15:37:25,940 WARN L205 SmtUtils]: Spent 6.56 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 15:37:46,116 WARN L205 SmtUtils]: Spent 20.16 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-02 15:38:00,314 WARN L205 SmtUtils]: Spent 12.12 s on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-02 15:38:12,449 WARN L205 SmtUtils]: Spent 12.12 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-02 15:38:32,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:38:32,883 INFO L93 Difference]: Finished difference Result 244 states and 304 transitions. [2021-05-02 15:38:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 15:38:32,884 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 85 [2021-05-02 15:38:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:38:32,884 INFO L225 Difference]: With dead ends: 244 [2021-05-02 15:38:32,884 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:38:32,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 117552.9ms TimeCoverageRelationStatistics Valid=83, Invalid=273, Unknown=24, NotChecked=0, Total=380 [2021-05-02 15:38:32,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:38:32,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:38:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 15:38:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:38:32,885 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2021-05-02 15:38:32,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:38:32,886 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:38:32,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 8 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 15:38:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:38:32,886 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:38:33,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 15:38:33,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:38:33,400 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-05-02 15:38:33,520 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-05-02 15:38:33,628 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-05-02 15:38:33,819 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 38 [2021-05-02 15:38:33,824 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 15:38:33,824 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 15:38:33,824 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 15:38:33,824 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:38:33,824 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 15:38:33,824 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:38:33,824 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:38:33,824 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (= ~counter~0 0) [2021-05-02 15:38:33,824 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:38:33,824 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:38:33,825 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:38:33,825 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 15:38:33,825 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:38:33,825 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:38:33,825 INFO L201 CegarLoopUtils]: At program point L58(line 58) the Hoare annotation is: true [2021-05-02 15:38:33,825 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 23 61) no Hoare annotation was computed. [2021-05-02 15:38:33,825 INFO L198 CegarLoopUtils]: For program point L52(lines 52 55) no Hoare annotation was computed. [2021-05-02 15:38:33,825 INFO L198 CegarLoopUtils]: For program point L52-2(lines 23 61) no Hoare annotation was computed. [2021-05-02 15:38:33,825 INFO L198 CegarLoopUtils]: For program point L46(lines 44 56) no Hoare annotation was computed. [2021-05-02 15:38:33,825 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 23 61) no Hoare annotation was computed. [2021-05-02 15:38:33,825 INFO L198 CegarLoopUtils]: For program point L44(lines 44 56) no Hoare annotation was computed. [2021-05-02 15:38:33,825 INFO L201 CegarLoopUtils]: At program point L44-2(lines 44 56) the Hoare annotation is: true [2021-05-02 15:38:33,825 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse4 (div main_~p~0 2))) (let ((.cse5 (* .cse4 main_~B~0))) (let ((.cse3 (= main_~d~0 (* .cse5 2))) (.cse0 (= main_~q~0 0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (= main_~B~0 1))) (or (and .cse0 .cse1 (= main_~p~0 2) (<= ~counter~0 2) .cse2 .cse3) (and .cse0 (= (mod main_~p~0 2) 0) .cse1 (<= (* 2 (* (div .cse4 2) main_~B~0)) main_~r~0) .cse2 .cse3 (= (mod .cse5 (- 2)) 0)) (not (= |old(~counter~0)| 0)) (and (<= ~counter~0 1) .cse0 .cse1 (= main_~d~0 1) (= main_~p~0 1) .cse2))))) [2021-05-02 15:38:33,825 INFO L198 CegarLoopUtils]: For program point L34-1(lines 34 42) no Hoare annotation was computed. [2021-05-02 15:38:33,825 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 42) the Hoare annotation is: (let ((.cse4 (div main_~p~0 2))) (let ((.cse5 (* .cse4 main_~B~0))) (let ((.cse3 (= main_~d~0 (* .cse5 2))) (.cse0 (= main_~q~0 0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (= main_~B~0 1))) (or (and (<= ~counter~0 1) .cse0 (= main_~p~0 2) .cse1 .cse2 .cse3) (and .cse0 (= (mod main_~p~0 2) 0) .cse1 (<= (* 2 (* (div .cse4 2) main_~B~0)) main_~r~0) .cse2 .cse3 (= (mod .cse5 (- 2)) 0)) (not (= |old(~counter~0)| 0)) (and .cse0 .cse1 (= ~counter~0 |old(~counter~0)|) (= main_~d~0 1) (= main_~p~0 1) .cse2))))) [2021-05-02 15:38:33,825 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 23 61) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (= |old(~counter~0)| 0))) [2021-05-02 15:38:33,825 INFO L198 CegarLoopUtils]: For program point L59(line 59) no Hoare annotation was computed. [2021-05-02 15:38:33,826 INFO L201 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: true [2021-05-02 15:38:33,826 INFO L201 CegarLoopUtils]: At program point L45-1(line 45) the Hoare annotation is: true [2021-05-02 15:38:33,826 INFO L198 CegarLoopUtils]: For program point L37(lines 34 42) no Hoare annotation was computed. [2021-05-02 15:38:33,826 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse4 (div main_~p~0 2))) (let ((.cse5 (* .cse4 main_~B~0))) (let ((.cse3 (= main_~d~0 (* .cse5 2))) (.cse0 (= main_~q~0 0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (= main_~B~0 1))) (or (and .cse0 .cse1 (= main_~p~0 2) (<= ~counter~0 2) .cse2 .cse3) (and .cse0 (= (mod main_~p~0 2) 0) .cse1 (<= (* 2 (* (div .cse4 2) main_~B~0)) main_~r~0) .cse2 .cse3 (= (mod .cse5 (- 2)) 0)) (not (= |old(~counter~0)| 0)) (and (<= ~counter~0 1) .cse0 .cse1 (= main_~d~0 1) (= main_~p~0 1) .cse2))))) [2021-05-02 15:38:33,826 INFO L194 CegarLoopUtils]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse4 (div main_~p~0 2))) (let ((.cse5 (* .cse4 main_~B~0))) (let ((.cse3 (= main_~d~0 (* .cse5 2))) (.cse0 (= main_~q~0 0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (= main_~B~0 1))) (or (and .cse0 .cse1 (= main_~p~0 2) (<= ~counter~0 2) .cse2 .cse3) (and .cse0 (= (mod main_~p~0 2) 0) .cse1 (<= (* 2 (* (div .cse4 2) main_~B~0)) main_~r~0) .cse2 .cse3 (= (mod .cse5 (- 2)) 0)) (not (= |old(~counter~0)| 0)) (and (<= ~counter~0 1) .cse0 .cse1 (= main_~d~0 1) (= main_~p~0 1) .cse2))))) [2021-05-02 15:38:33,826 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 15:38:33,826 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 15:38:33,826 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 15:38:33,826 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:38:33,826 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:38:33,826 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 15:38:33,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:38:33 BoogieIcfgContainer [2021-05-02 15:38:33,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:38:33,840 INFO L168 Benchmark]: Toolchain (without parser) took 180624.26 ms. Allocated memory was 216.0 MB in the beginning and 332.4 MB in the end (delta: 116.4 MB). Free memory was 182.0 MB in the beginning and 204.8 MB in the end (delta: -22.9 MB). Peak memory consumption was 178.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:38:33,840 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 216.0 MB. Free memory is still 198.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:38:33,840 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.36 ms. Allocated memory is still 216.0 MB. Free memory was 181.8 MB in the beginning and 171.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:38:33,841 INFO L168 Benchmark]: Boogie Preprocessor took 20.80 ms. Allocated memory is still 216.0 MB. Free memory was 171.9 MB in the beginning and 170.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:38:33,841 INFO L168 Benchmark]: RCFGBuilder took 322.15 ms. Allocated memory is still 216.0 MB. Free memory was 170.4 MB in the beginning and 184.4 MB in the end (delta: -13.9 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:38:33,841 INFO L168 Benchmark]: TraceAbstraction took 180133.92 ms. Allocated memory was 216.0 MB in the beginning and 332.4 MB in the end (delta: 116.4 MB). Free memory was 183.9 MB in the beginning and 204.8 MB in the end (delta: -21.0 MB). Peak memory consumption was 181.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:38:33,842 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 216.0 MB. Free memory is still 198.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 143.36 ms. Allocated memory is still 216.0 MB. Free memory was 181.8 MB in the beginning and 171.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.80 ms. Allocated memory is still 216.0 MB. Free memory was 171.9 MB in the beginning and 170.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 322.15 ms. Allocated memory is still 216.0 MB. Free memory was 170.4 MB in the beginning and 184.4 MB in the end (delta: -13.9 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 180133.92 ms. Allocated memory was 216.0 MB in the beginning and 332.4 MB in the end (delta: 116.4 MB). Free memory was 183.9 MB in the beginning and 204.8 MB in the end (delta: -21.0 MB). Peak memory consumption was 181.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 179331.6ms, OverallIterations: 21, TraceHistogramMax: 13, EmptinessCheckTime: 24.8ms, AutomataDifference: 137666.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 736.7ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 789 SDtfs, 370 SDslu, 2666 SDs, 0 SdLazy, 2630 SolverSat, 321 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 51761.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1035 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 118756.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=20, InterpolantAutomatonStates: 168, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 201.8ms AutomataMinimizationTime, 21 MinimizatonAttempts, 40 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 13 LocationsWithAnnotation, 156 PreInvPairs, 220 NumberOfFragments, 423 HoareAnnotationTreeSize, 156 FomulaSimplifications, 2235 FormulaSimplificationTreeSizeReduction, 163.2ms HoareSimplificationTime, 13 FomulaSimplificationsInter, 1048 FormulaSimplificationTreeSizeReductionInter, 559.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 165.8ms SsaConstructionTime, 441.9ms SatisfiabilityAnalysisTime, 36542.4ms InterpolantComputationTime, 1038 NumberOfCodeBlocks, 955 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1017 ConstructedInterpolants, 0 QuantifiedInterpolants, 4875 SizeOfPredicates, 70 NumberOfNonLiveVariables, 3230 ConjunctsInSsa, 367 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 1741/2481 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((counter <= 1 && q == 0) && p == 2) && A == r) && B == 1) && d == p / 2 * B * 2) || ((((((q == 0 && p % 2 == 0) && A == r) && 2 * (p / 2 / 2 * B) <= r) && B == 1) && d == p / 2 * B * 2) && p / 2 * B % -2 == 0)) || !(\old(counter) == 0)) || (((((q == 0 && A == r) && counter == \old(counter)) && d == 1) && p == 1) && B == 1) RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...