/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/divbin_valuebound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:17:07,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:17:07,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:17:07,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:17:07,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:17:07,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:17:07,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:17:07,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:17:07,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:17:07,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:17:07,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:17:07,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:17:07,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:17:07,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:17:07,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:17:07,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:17:07,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:17:07,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:17:07,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:17:07,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:17:07,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:17:07,600 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:17:07,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:17:07,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:17:07,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:17:07,603 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:17:07,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:17:07,604 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:17:07,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:17:07,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:17:07,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:17:07,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:17:07,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:17:07,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:17:07,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:17:07,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:17:07,605 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:17:07,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:17:07,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:17:07,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:17:07,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:17:07,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:17:07,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:17:07,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:17:07,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:17:07,606 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:17:07,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:17:07,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:17:07,607 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:17:07,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:17:07,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:17:07,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:17:07,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:17:07,894 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:17:07,895 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:17:07,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound5.i [2021-05-06 02:17:07,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1659f50d/2e1844c4407c454ca78109cef52b8e80/FLAG2adc79273 [2021-05-06 02:17:08,348 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:17:08,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound5.i [2021-05-06 02:17:08,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1659f50d/2e1844c4407c454ca78109cef52b8e80/FLAG2adc79273 [2021-05-06 02:17:08,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1659f50d/2e1844c4407c454ca78109cef52b8e80 [2021-05-06 02:17:08,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:17:08,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:17:08,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:17:08,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:17:08,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:17:08,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:17:08" (1/1) ... [2021-05-06 02:17:08,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@237b6acb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:17:08, skipping insertion in model container [2021-05-06 02:17:08,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:17:08" (1/1) ... [2021-05-06 02:17:08,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:17:08,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:17:08,963 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/divbin_valuebound5.i[958,971] [2021-05-06 02:17:08,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:17:08,978 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:17:08,993 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/divbin_valuebound5.i[958,971] [2021-05-06 02:17:08,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:17:09,025 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:17:09,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:17:09 WrapperNode [2021-05-06 02:17:09,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:17:09,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:17:09,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:17:09,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:17:09,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:17:09" (1/1) ... [2021-05-06 02:17:09,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:17:09" (1/1) ... [2021-05-06 02:17:09,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:17:09" (1/1) ... [2021-05-06 02:17:09,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:17:09" (1/1) ... [2021-05-06 02:17:09,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:17:09" (1/1) ... [2021-05-06 02:17:09,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:17:09" (1/1) ... [2021-05-06 02:17:09,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:17:09" (1/1) ... [2021-05-06 02:17:09,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:17:09,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:17:09,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:17:09,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:17:09,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:17:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:17:09,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:17:09,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:17:09,126 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:17:09,126 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:17:09,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:17:09,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:17:09,127 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:17:09,127 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:17:09,127 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 02:17:09,128 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 02:17:09,128 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:17:09,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:17:09,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 02:17:09,128 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:17:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:17:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:17:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:17:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:17:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:17:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:17:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:17:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:17:09,410 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:17:09,410 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:17:09,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:17:09 BoogieIcfgContainer [2021-05-06 02:17:09,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:17:09,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:17:09,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:17:09,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:17:09,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:17:08" (1/3) ... [2021-05-06 02:17:09,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16663953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:17:09, skipping insertion in model container [2021-05-06 02:17:09,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:17:09" (2/3) ... [2021-05-06 02:17:09,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16663953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:17:09, skipping insertion in model container [2021-05-06 02:17:09,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:17:09" (3/3) ... [2021-05-06 02:17:09,417 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound5.i [2021-05-06 02:17:09,420 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:17:09,423 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:17:09,434 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:17:09,450 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:17:09,451 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:17:09,451 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:17:09,451 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:17:09,451 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:17:09,451 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:17:09,451 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:17:09,451 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:17:09,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 02:17:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:17:09,466 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:17:09,466 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:17:09,467 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:17:09,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:17:09,471 INFO L82 PathProgramCache]: Analyzing trace with hash 291922115, now seen corresponding path program 1 times [2021-05-06 02:17:09,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:17:09,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415207407] [2021-05-06 02:17:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:17:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:17:09,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:17:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:17:09,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:17:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:17:09,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:17:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:17:09,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:17:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:17:09,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:17:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:17:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:17:09,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:17:09,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415207407] [2021-05-06 02:17:09,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415207407] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:17:09,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:17:09,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:17:09,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414699324] [2021-05-06 02:17:09,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:17:09,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:17:09,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:17:09,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:17:09,716 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:17:09,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:17:09,809 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2021-05-06 02:17:09,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:17:09,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 02:17:09,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:17:09,819 INFO L225 Difference]: With dead ends: 61 [2021-05-06 02:17:09,820 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 02:17:09,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:17:09,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 02:17:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 02:17:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:17:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 02:17:09,848 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-06 02:17:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:17:09,849 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 02:17:09,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:17:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 02:17:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 02:17:09,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:17:09,850 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:17:09,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:17:09,851 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:17:09,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:17:09,851 INFO L82 PathProgramCache]: Analyzing trace with hash -245963777, now seen corresponding path program 1 times [2021-05-06 02:17:09,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:17:09,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33927179] [2021-05-06 02:17:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:17:09,866 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:17:09,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429499736] [2021-05-06 02:17:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:17:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:17:09,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:17:09,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:17:10,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:17:10,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:17:10,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33927179] [2021-05-06 02:17:10,350 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:17:10,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429499736] [2021-05-06 02:17:10,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429499736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:17:10,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:17:10,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:17:10,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349737733] [2021-05-06 02:17:10,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:17:10,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:17:10,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:17:10,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:17:10,353 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:17:10,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:17:10,525 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-06 02:17:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:17:10,526 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2021-05-06 02:17:10,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:17:10,529 INFO L225 Difference]: With dead ends: 44 [2021-05-06 02:17:10,529 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 02:17:10,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:17:10,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 02:17:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-06 02:17:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 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) [2021-05-06 02:17:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-06 02:17:10,549 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-06 02:17:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:17:10,551 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-06 02:17:10,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:17:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-06 02:17:10,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:17:10,553 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:17:10,553 INFO L523 BasicCegarLoop]: trace histogram [4, 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, 1] [2021-05-06 02:17:10,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:17:10,769 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:17:10,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:17:10,770 INFO L82 PathProgramCache]: Analyzing trace with hash 397552474, now seen corresponding path program 1 times [2021-05-06 02:17:10,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:17:10,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218144115] [2021-05-06 02:17:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:17:10,783 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:17:10,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513081820] [2021-05-06 02:17:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:17:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:17:10,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:17:10,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:17:10,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:10,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:17:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:17:11,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:17:11,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218144115] [2021-05-06 02:17:11,010 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:17:11,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513081820] [2021-05-06 02:17:11,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513081820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:17:11,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:17:11,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:17:11,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072971998] [2021-05-06 02:17:11,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:17:11,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:17:11,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:17:11,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:17:11,011 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:17:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:17:13,393 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2021-05-06 02:17:13,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:17:13,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 02:17:13,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:17:13,395 INFO L225 Difference]: With dead ends: 56 [2021-05-06 02:17:13,395 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 02:17:13,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:17:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 02:17:13,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-05-06 02:17:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 02:17:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-05-06 02:17:13,401 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 37 [2021-05-06 02:17:13,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:17:13,402 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-05-06 02:17:13,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:17:13,402 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-05-06 02:17:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 02:17:13,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:17:13,403 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:17:13,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:17:13,622 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:17:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:17:13,622 INFO L82 PathProgramCache]: Analyzing trace with hash -382866049, now seen corresponding path program 1 times [2021-05-06 02:17:13,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:17:13,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080543993] [2021-05-06 02:17:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:17:13,640 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:17:13,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354077870] [2021-05-06 02:17:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:17:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:17:13,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 02:17:13,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:17:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:17:13,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:17:13,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080543993] [2021-05-06 02:17:13,831 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:17:13,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354077870] [2021-05-06 02:17:13,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354077870] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:17:13,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:17:13,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:17:13,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993546671] [2021-05-06 02:17:13,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:17:13,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:17:13,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:17:13,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:17:13,833 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:17:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:17:13,863 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-05-06 02:17:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:17:13,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-05-06 02:17:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:17:13,864 INFO L225 Difference]: With dead ends: 64 [2021-05-06 02:17:13,865 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 02:17:13,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:17:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 02:17:13,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 02:17:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 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) [2021-05-06 02:17:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 02:17:13,869 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 43 [2021-05-06 02:17:13,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:17:13,870 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 02:17:13,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:17:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 02:17:13,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 02:17:13,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:17:13,871 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:17:14,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:17:14,093 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:17:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:17:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash 866494938, now seen corresponding path program 1 times [2021-05-06 02:17:14,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:17:14,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351130236] [2021-05-06 02:17:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:17:14,104 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:17:14,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711016569] [2021-05-06 02:17:14,104 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