/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:45:37,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:45:37,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:45:37,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:45:37,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:45:37,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:45:37,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:45:37,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:45:37,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:45:37,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:45:37,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:45:37,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:45:37,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:45:37,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:45:37,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:45:37,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:45:37,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:45:37,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:45:37,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:45:37,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:45:37,799 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 04:45:37,825 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:45:37,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:45:37,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:45:37,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:45:37,828 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:45:37,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:45:37,828 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:45:37,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:45:37,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:45:37,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:45:37,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:45:37,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:45:37,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:45:37,829 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:45:37,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:45:37,829 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:45:37,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:45:37,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:45:37,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:45:37,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:45:37,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:45:37,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:45:37,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:45:37,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:45:37,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:45:37,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:45:37,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:45:37,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:45:37,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:45:38,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:45:38,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:45:38,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:45:38,097 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:45:38,097 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:45:38,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound5.c [2021-05-06 04:45:38,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f453fe18e/0f85d42045b4472eb4638a908b8c7c31/FLAGba3606d94 [2021-05-06 04:45:38,563 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:45:38,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound5.c [2021-05-06 04:45:38,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f453fe18e/0f85d42045b4472eb4638a908b8c7c31/FLAGba3606d94 [2021-05-06 04:45:38,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f453fe18e/0f85d42045b4472eb4638a908b8c7c31 [2021-05-06 04:45:38,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:45:38,585 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:45:38,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:45:38,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:45:38,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:45:38,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:45:38" (1/1) ... [2021-05-06 04:45:38,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0c8109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:38, skipping insertion in model container [2021-05-06 04:45:38,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:45:38" (1/1) ... [2021-05-06 04:45:38,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:45:38,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:45:38,715 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound5.c[458,471] [2021-05-06 04:45:38,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:45:38,732 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:45:38,773 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound5.c[458,471] [2021-05-06 04:45:38,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:45:38,795 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:45:38,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:38 WrapperNode [2021-05-06 04:45:38,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:45:38,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:45:38,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:45:38,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:45:38,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:38" (1/1) ... [2021-05-06 04:45:38,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:38" (1/1) ... [2021-05-06 04:45:38,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:38" (1/1) ... [2021-05-06 04:45:38,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:38" (1/1) ... [2021-05-06 04:45:38,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:38" (1/1) ... [2021-05-06 04:45:38,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:38" (1/1) ... [2021-05-06 04:45:38,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:38" (1/1) ... [2021-05-06 04:45:38,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:45:38,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:45:38,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:45:38,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:45:38,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:45:38,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:45:38,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:45:38,894 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:45:38,894 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:45:38,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:45:38,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:45:38,894 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:45:38,895 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:45:38,895 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:45:38,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:45:38,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 04:45:38,895 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:45:38,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:45:38,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:45:38,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:45:38,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:45:38,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:45:38,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:45:38,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:45:38,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:45:39,089 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:45:39,099 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:45:39,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:45:39 BoogieIcfgContainer [2021-05-06 04:45:39,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:45:39,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:45:39,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:45:39,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:45:39,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:45:38" (1/3) ... [2021-05-06 04:45:39,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca98d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:45:39, skipping insertion in model container [2021-05-06 04:45:39,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:38" (2/3) ... [2021-05-06 04:45:39,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca98d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:45:39, skipping insertion in model container [2021-05-06 04:45:39,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:45:39" (3/3) ... [2021-05-06 04:45:39,108 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound5.c [2021-05-06 04:45:39,112 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:45:39,114 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:45:39,123 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:45:39,154 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:45:39,154 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:45:39,154 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:45:39,155 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:45:39,155 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:45:39,155 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:45:39,155 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:45:39,155 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:45:39,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:45:39,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:45:39,167 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:39,168 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:39,168 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:39,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:39,171 INFO L82 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times [2021-05-06 04:45:39,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:39,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479154331] [2021-05-06 04:45:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:45:39,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:45:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:45:39,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:45:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:45:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:45:39,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:39,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479154331] [2021-05-06 04:45:39,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479154331] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:45:39,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:45:39,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:45:39,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981812752] [2021-05-06 04:45:39,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:45:39,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:39,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:45:39,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:45:39,386 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:45:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:39,439 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2021-05-06 04:45:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:45:39,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 04:45:39,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:39,445 INFO L225 Difference]: With dead ends: 47 [2021-05-06 04:45:39,445 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 04:45:39,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:45:39,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 04:45:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 04:45:39,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:45:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-06 04:45:39,480 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2021-05-06 04:45:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:39,480 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-06 04:45:39,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:45:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-06 04:45:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:45:39,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:39,482 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:39,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:45:39,482 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:39,484 INFO L82 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times [2021-05-06 04:45:39,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:39,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895817182] [2021-05-06 04:45:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:39,517 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:39,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836674933] [2021-05-06 04:45:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:45:39,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:45:39,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:39,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:45:39,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:39,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895817182] [2021-05-06 04:45:39,711 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:39,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836674933] [2021-05-06 04:45:39,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836674933] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:45:39,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:45:39,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:45:39,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573302992] [2021-05-06 04:45:39,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:45:39,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:39,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:45:39,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:45:39,715 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:45:39,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:39,764 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-06 04:45:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:45:39,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 04:45:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:39,766 INFO L225 Difference]: With dead ends: 34 [2021-05-06 04:45:39,766 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 04:45:39,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:45:39,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 04:45:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 04:45:39,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:45:39,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-06 04:45:39,779 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-05-06 04:45:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:39,780 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-06 04:45:39,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:45:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-06 04:45:39,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 04:45:39,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:39,784 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:40,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:45:40,001 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:40,008 INFO L82 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 1 times [2021-05-06 04:45:40,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:40,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801790554] [2021-05-06 04:45:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:40,020 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:40,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104881434] [2021-05-06 04:45:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:45:40,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:45:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:40,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:45:40,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:40,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801790554] [2021-05-06 04:45:40,173 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:40,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104881434] [2021-05-06 04:45:40,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104881434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:40,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:40,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:45:40,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764993246] [2021-05-06 04:45:40,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:45:40,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:40,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:45:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:45:40,174 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:45:40,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:40,236 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-05-06 04:45:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:45:40,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 04:45:40,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:40,239 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:45:40,239 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 04:45:40,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:45:40,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 04:45:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 04:45:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:45:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 04:45:40,259 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2021-05-06 04:45:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:40,259 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 04:45:40,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:45:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 04:45:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 04:45:40,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:40,260 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:40,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:40,477 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 1 times [2021-05-06 04:45:40,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:40,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857114019] [2021-05-06 04:45:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:40,493 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:40,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342290740] [2021-05-06 04:45:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:45:40,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:45:40,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:40,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:40,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:40,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:40,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:40,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:40,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:40,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:40,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:40,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:45:40,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:40,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857114019] [2021-05-06 04:45:40,656 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:40,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342290740] [2021-05-06 04:45:40,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342290740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:40,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:40,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:45:40,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944852754] [2021-05-06 04:45:40,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:45:40,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:40,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:45:40,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:45:40,657 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:45:40,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:40,707 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-06 04:45:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:45:40,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-06 04:45:40,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:40,708 INFO L225 Difference]: With dead ends: 44 [2021-05-06 04:45:40,708 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 04:45:40,708 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:45:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 04:45:40,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 04:45:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:45:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-05-06 04:45:40,713 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2021-05-06 04:45:40,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:40,713 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-05-06 04:45:40,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:45:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-05-06 04:45:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 04:45:40,714 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:40,714 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:40,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:40,935 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:40,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:40,935 INFO L82 PathProgramCache]: Analyzing trace with hash -965543213, now seen corresponding path program 2 times [2021-05-06 04:45:40,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:40,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543571154] [2021-05-06 04:45:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:40,948 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:40,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371367395] [2021-05-06 04:45:40,949 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:41,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:45:41,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:41,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 04:45:41,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:41,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:45:41,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:41,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543571154] [2021-05-06 04:45:41,092 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:41,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371367395] [2021-05-06 04:45:41,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371367395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:41,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:41,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:45:41,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384450638] [2021-05-06 04:45:41,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:45:41,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:41,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:45:41,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:45:41,093 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:45:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:41,179 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-05-06 04:45:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:45:41,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-06 04:45:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:41,180 INFO L225 Difference]: With dead ends: 48 [2021-05-06 04:45:41,180 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 04:45:41,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:45:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 04:45:41,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 04:45:41,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:45:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-05-06 04:45:41,185 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 31 [2021-05-06 04:45:41,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:41,186 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-05-06 04:45:41,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:45:41,186 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-05-06 04:45:41,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 04:45:41,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:41,186 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:41,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:41,387 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:41,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:41,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2045316535, now seen corresponding path program 2 times [2021-05-06 04:45:41,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:41,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487945845] [2021-05-06 04:45:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:41,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:41,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479519301] [2021-05-06 04:45:41,395 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:41,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:45:41,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 04:45:41,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:41,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:41,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:41,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:41,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:41,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:41,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:41,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:41,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:41,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 04:45:41,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:41,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487945845] [2021-05-06 04:45:41,577 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:41,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479519301] [2021-05-06 04:45:41,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479519301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:41,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:41,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:45:41,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404676897] [2021-05-06 04:45:41,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:45:41,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:41,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:45:41,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:45:41,579 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 04:45:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:41,672 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-05-06 04:45:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:45:41,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-06 04:45:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:41,674 INFO L225 Difference]: With dead ends: 51 [2021-05-06 04:45:41,674 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 04:45:41,674 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:45:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 04:45:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 04:45:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:45:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-06 04:45:41,689 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-05-06 04:45:41,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:41,689 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-06 04:45:41,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 04:45:41,689 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-06 04:45:41,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 04:45:41,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:41,690 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:41,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 04:45:41,905 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:41,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:41,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1045939826, now seen corresponding path program 3 times [2021-05-06 04:45:41,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:41,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063676978] [2021-05-06 04:45:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:41,911 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:41,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18703666] [2021-05-06 04:45:41,911 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:41,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 04:45:41,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:41,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:45:41,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:42,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:42,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:42,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-06 04:45:42,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:42,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063676978] [2021-05-06 04:45:42,112 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:42,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18703666] [2021-05-06 04:45:42,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18703666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:42,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:42,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:45:42,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479231728] [2021-05-06 04:45:42,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:45:42,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:42,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:45:42,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:45:42,113 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:45:42,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:42,165 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-05-06 04:45:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:45:42,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-05-06 04:45:42,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:42,166 INFO L225 Difference]: With dead ends: 50 [2021-05-06 04:45:42,166 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 04:45:42,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:45:42,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 04:45:42,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 04:45:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:45:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 04:45:42,171 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 38 [2021-05-06 04:45:42,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:42,172 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 04:45:42,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:45:42,172 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 04:45:42,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 04:45:42,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:42,172 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:42,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:42,389 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:42,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:42,389 INFO L82 PathProgramCache]: Analyzing trace with hash -285848920, now seen corresponding path program 3 times [2021-05-06 04:45:42,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:42,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020438349] [2021-05-06 04:45:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:42,394 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:42,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347263035] [2021-05-06 04:45:42,394 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:42,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:45:42,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:42,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:45:42,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:42,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:42,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:42,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:42,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:42,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:42,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:42,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:42,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:42,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 04:45:42,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:42,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020438349] [2021-05-06 04:45:42,612 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:42,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347263035] [2021-05-06 04:45:42,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347263035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:42,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:42,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:45:42,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081459463] [2021-05-06 04:45:42,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:45:42,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:42,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:45:42,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:45:42,613 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 04:45:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:42,679 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-05-06 04:45:42,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:45:42,680 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2021-05-06 04:45:42,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:42,680 INFO L225 Difference]: With dead ends: 53 [2021-05-06 04:45:42,680 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 04:45:42,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:45:42,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 04:45:42,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 04:45:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:45:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-05-06 04:45:42,685 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2021-05-06 04:45:42,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:42,686 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-05-06 04:45:42,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 04:45:42,686 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-05-06 04:45:42,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 04:45:42,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:42,686 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:42,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 04:45:42,897 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:42,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:42,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1858889367, now seen corresponding path program 4 times [2021-05-06 04:45:42,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:42,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863780728] [2021-05-06 04:45:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:42,902 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:42,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637509353] [2021-05-06 04:45:42,902 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:42,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:45:42,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:42,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 04:45:42,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:43,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 04:45:43,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:43,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863780728] [2021-05-06 04:45:43,129 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:43,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637509353] [2021-05-06 04:45:43,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637509353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:43,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:43,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:45:43,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110401186] [2021-05-06 04:45:43,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:45:43,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:43,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:45:43,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:45:43,131 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 04:45:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:43,204 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-05-06 04:45:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:45:43,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2021-05-06 04:45:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:43,206 INFO L225 Difference]: With dead ends: 56 [2021-05-06 04:45:43,206 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 04:45:43,206 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:45:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 04:45:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-06 04:45:43,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:45:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-05-06 04:45:43,216 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 51 [2021-05-06 04:45:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:43,216 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-05-06 04:45:43,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 04:45:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-05-06 04:45:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 04:45:43,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:43,218 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:43,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 04:45:43,436 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:43,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1288003464, now seen corresponding path program 5 times [2021-05-06 04:45:43,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:43,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538811402] [2021-05-06 04:45:43,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:43,442 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:43,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312980142] [2021-05-06 04:45:43,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:43,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:45:43,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:43,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 04:45:43,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:43,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 04:45:43,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:43,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538811402] [2021-05-06 04:45:43,748 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:43,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312980142] [2021-05-06 04:45:43,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312980142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:43,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:43,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:45:43,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450266666] [2021-05-06 04:45:43,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:45:43,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:43,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:45:43,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:45:43,749 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 04:45:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:43,859 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-05-06 04:45:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 04:45:43,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2021-05-06 04:45:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:43,860 INFO L225 Difference]: With dead ends: 59 [2021-05-06 04:45:43,860 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 04:45:43,860 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:45:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 04:45:43,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 04:45:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:45:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-05-06 04:45:43,865 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 58 [2021-05-06 04:45:43,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:43,865 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-05-06 04:45:43,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 04:45:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-05-06 04:45:43,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 04:45:43,866 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:43,866 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:44,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:44,081 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:44,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:44,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1494042761, now seen corresponding path program 6 times [2021-05-06 04:45:44,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:44,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548891883] [2021-05-06 04:45:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:44,086 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:44,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750363758] [2021-05-06 04:45:44,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:44,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 04:45:44,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:44,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:45:44,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:44,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-05-06 04:45:44,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:44,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548891883] [2021-05-06 04:45:44,337 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:44,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750363758] [2021-05-06 04:45:44,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750363758] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:45:44,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:45:44,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 04:45:44,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736664982] [2021-05-06 04:45:44,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:45:44,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:45:44,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:45:44,339 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 04:45:44,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:44,386 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-05-06 04:45:44,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 04:45:44,387 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2021-05-06 04:45:44,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:44,387 INFO L225 Difference]: With dead ends: 58 [2021-05-06 04:45:44,387 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 04:45:44,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:45:44,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 04:45:44,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 04:45:44,388 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) [2021-05-06 04:45:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 04:45:44,388 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2021-05-06 04:45:44,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:44,388 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 04:45:44,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 04:45:44,388 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 04:45:44,388 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 04:45:44,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 04:45:44,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 04:45:44,897 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2021-05-06 04:45:45,078 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-05-06 04:45:45,275 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2021-05-06 04:45:45,305 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-06 04:45:45,305 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-06 04:45:45,305 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-06 04:45:45,305 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 04:45:45,305 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)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 04:45:45,305 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 04:45:45,305 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 04:45:45,305 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 04:45:45,305 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 04:45:45,306 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 04:45:45,306 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2021-05-06 04:45:45,306 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-06 04:45:45,306 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-06 04:45:45,306 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-06 04:45:45,306 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 40) the Hoare annotation is: true [2021-05-06 04:45:45,306 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (let ((.cse2 (* main_~y~0 main_~y~0 main_~y~0))) (let ((.cse0 (= (* main_~x~0 4) (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* .cse2 2)))) (.cse1 (<= main_~k~0 5))) (or (and .cse0 (< 2 main_~k~0) .cse1 (= main_~c~0 3) (= main_~y~0 3)) (and (= main_~c~0 0) (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0) .cse1) (and (= main_~x~0 (+ .cse2 1)) (= main_~y~0 2) (< 1 main_~k~0) .cse1 (= main_~c~0 2)) (and (= main_~c~0 1) (= main_~y~0 1) (= .cse2 main_~x~0) .cse1 (< main_~c~0 (+ main_~k~0 1))) (and (<= main_~c~0 5) (= 5 main_~y~0) (<= 5 main_~c~0) .cse0 (< 4 main_~k~0) .cse1) (and (<= main_~c~0 4) .cse0 (< 3 main_~k~0) (= main_~y~0 4) .cse1 (<= 4 main_~c~0))))) [2021-05-06 04:45:45,306 INFO L198 CegarLoopUtils]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2021-05-06 04:45:45,306 INFO L194 CegarLoopUtils]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse2 (* main_~y~0 main_~y~0 main_~y~0))) (let ((.cse0 (= (* main_~x~0 4) (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* .cse2 2)))) (.cse1 (<= main_~k~0 5))) (or (and .cse0 (< 2 main_~k~0) .cse1 (= main_~c~0 3) (= main_~y~0 3)) (and (= main_~c~0 0) (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0) .cse1) (and (= main_~x~0 (+ .cse2 1)) (= main_~y~0 2) (< 1 main_~k~0) .cse1 (= main_~c~0 2)) (and (= main_~c~0 1) (= main_~y~0 1) (= .cse2 main_~x~0) .cse1 (< main_~c~0 (+ main_~k~0 1))) (and (<= main_~c~0 5) (= 5 main_~y~0) (<= 5 main_~c~0) .cse0 (< 4 main_~k~0) .cse1) (and (<= main_~c~0 4) .cse0 (< 3 main_~k~0) (= main_~y~0 4) .cse1 (<= 4 main_~c~0))))) [2021-05-06 04:45:45,306 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 40) no Hoare annotation was computed. [2021-05-06 04:45:45,306 INFO L194 CegarLoopUtils]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse1 (* main_~y~0 main_~y~0 main_~y~0))) (let ((.cse0 (= (* main_~x~0 4) (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* .cse1 2))))) (or (and (<= main_~c~0 5) (= 5 main_~y~0) .cse0 (< 4 main_~k~0) (<= main_~k~0 5)) (and (<= main_~k~0 1) (= main_~y~0 1) (= .cse1 main_~x~0) (<= main_~c~0 1) (< 0 main_~k~0)) (and (<= main_~c~0 3) .cse0 (< 2 main_~k~0) (<= main_~k~0 3) (= main_~y~0 3)) (and (= main_~y~0 0) (= main_~x~0 0)) (and (<= main_~c~0 4) (<= main_~k~0 4) .cse0 (< 3 main_~k~0) (= main_~y~0 4)) (and (<= main_~c~0 2) (= main_~x~0 (+ .cse1 1)) (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2))))) [2021-05-06 04:45:45,306 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-05-06 04:45:45,307 INFO L198 CegarLoopUtils]: For program point L21-1(line 21) no Hoare annotation was computed. [2021-05-06 04:45:45,307 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 40) no Hoare annotation was computed. [2021-05-06 04:45:45,307 INFO L198 CegarLoopUtils]: For program point L38(line 38) no Hoare annotation was computed. [2021-05-06 04:45:45,307 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (= (* main_~x~0 4) (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2))) [2021-05-06 04:45:45,307 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-06 04:45:45,307 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-06 04:45:45,307 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-06 04:45:45,307 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-06 04:45:45,307 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-06 04:45:45,307 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-06 04:45:45,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 04:45:45 BoogieIcfgContainer [2021-05-06 04:45:45,319 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 04:45:45,320 INFO L168 Benchmark]: Toolchain (without parser) took 6735.47 ms. Allocated memory was 187.7 MB in the beginning and 243.3 MB in the end (delta: 55.6 MB). Free memory was 152.0 MB in the beginning and 103.0 MB in the end (delta: 49.0 MB). Peak memory consumption was 124.2 MB. Max. memory is 8.0 GB. [2021-05-06 04:45:45,320 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 187.7 MB. Free memory was 168.6 MB in the beginning and 168.4 MB in the end (delta: 210.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:45:45,320 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.43 ms. Allocated memory is still 187.7 MB. Free memory was 151.8 MB in the beginning and 170.6 MB in the end (delta: -18.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-05-06 04:45:45,320 INFO L168 Benchmark]: Boogie Preprocessor took 30.81 ms. Allocated memory is still 187.7 MB. Free memory was 170.6 MB in the beginning and 169.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 04:45:45,320 INFO L168 Benchmark]: RCFGBuilder took 272.83 ms. Allocated memory is still 187.7 MB. Free memory was 169.1 MB in the beginning and 154.9 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 04:45:45,320 INFO L168 Benchmark]: TraceAbstraction took 6218.20 ms. Allocated memory was 187.7 MB in the beginning and 243.3 MB in the end (delta: 55.6 MB). Free memory was 154.4 MB in the beginning and 103.0 MB in the end (delta: 51.4 MB). Peak memory consumption was 125.8 MB. Max. memory is 8.0 GB. [2021-05-06 04:45:45,321 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 187.7 MB. Free memory was 168.6 MB in the beginning and 168.4 MB in the end (delta: 210.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 209.43 ms. Allocated memory is still 187.7 MB. Free memory was 151.8 MB in the beginning and 170.6 MB in the end (delta: -18.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.81 ms. Allocated memory is still 187.7 MB. Free memory was 170.6 MB in the beginning and 169.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 272.83 ms. Allocated memory is still 187.7 MB. Free memory was 169.1 MB in the beginning and 154.9 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6218.20 ms. Allocated memory was 187.7 MB in the beginning and 243.3 MB in the end (delta: 55.6 MB). Free memory was 154.4 MB in the beginning and 103.0 MB in the end (delta: 51.4 MB). Peak memory consumption was 125.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5453.2ms, OverallIterations: 11, TraceHistogramMax: 8, EmptinessCheckTime: 13.7ms, AutomataDifference: 782.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 699.4ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 310 SDtfs, 68 SDslu, 1369 SDs, 0 SdLazy, 613 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 384.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 408 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 544.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=10, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 101.2ms AutomataMinimizationTime, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 31 PreInvPairs, 53 NumberOfFragments, 522 HoareAnnotationTreeSize, 31 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 60.6ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 1035 FormulaSimplificationTreeSizeReductionInter, 631.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 90.0ms SsaConstructionTime, 322.7ms SatisfiabilityAnalysisTime, 1449.1ms InterpolantComputationTime, 412 NumberOfCodeBlocks, 396 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 401 ConstructedInterpolants, 0 QuantifiedInterpolants, 1312 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1472 ConjunctsInSsa, 158 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 383/498 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: 27]: Loop Invariant Derived loop invariant: ((((((((x * 4 == y * y * y * y + y * y + y * y * y * 2 && 2 < k) && k <= 5) && c == 3) && y == 3) || ((((c == 0 && 0 <= k) && y == 0) && x == 0) && k <= 5)) || ((((x == y * y * y + 1 && y == 2) && 1 < k) && k <= 5) && c == 2)) || ((((c == 1 && y == 1) && y * y * y == x) && k <= 5) && c < k + 1)) || (((((c <= 5 && 5 == y) && 5 <= c) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && 4 < k) && k <= 5)) || (((((c <= 4 && x * 4 == y * y * y * y + y * y + y * y * y * 2) && 3 < k) && y == 4) && k <= 5) && 4 <= c) RESULT: Ultimate proved your program to be correct! Received shutdown request...