/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/ps5-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:09:25,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:09:25,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:09:25,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:09:25,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:09:25,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:09:25,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:09:25,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:09:25,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:09:25,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:09:25,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:09:25,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:09:25,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:09:25,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:09:25,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:09:25,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:09:25,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:09:25,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:09:25,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:09:25,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:09:25,115 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 17:09:25,152 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:09:25,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:09:25,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:09:25,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:09:25,155 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:09:25,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:09:25,156 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:09:25,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:09:25,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:09:25,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:09:25,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:09:25,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:09:25,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:09:25,157 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:09:25,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:09:25,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:09:25,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:09:25,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:09:25,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:09:25,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:09:25,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:09:25,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:09:25,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:09:25,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:09:25,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:09:25,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:09:25,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:09:25,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:09:25,160 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:09:25,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:09:25,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:09:25,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:09:25,481 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:09:25,482 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:09:25,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound2.c [2021-05-02 17:09:25,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ab0ec5bb/cfcce726ab984d4d85e9e6f35c9d304e/FLAG3b662396f [2021-05-02 17:09:25,965 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:09:25,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound2.c [2021-05-02 17:09:25,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ab0ec5bb/cfcce726ab984d4d85e9e6f35c9d304e/FLAG3b662396f [2021-05-02 17:09:26,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ab0ec5bb/cfcce726ab984d4d85e9e6f35c9d304e [2021-05-02 17:09:26,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:09:26,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:09:26,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:09:26,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:09:26,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:09:26,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:09:26" (1/1) ... [2021-05-02 17:09:26,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d639309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:09:26, skipping insertion in model container [2021-05-02 17:09:26,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:09:26" (1/1) ... [2021-05-02 17:09:26,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:09:26,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:09:26,557 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/ps5-ll_valuebound2.c[458,471] [2021-05-02 17:09:26,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:09:26,582 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:09:26,632 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/ps5-ll_valuebound2.c[458,471] [2021-05-02 17:09:26,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:09:26,659 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:09:26,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:09:26 WrapperNode [2021-05-02 17:09:26,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:09:26,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:09:26,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:09:26,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:09:26,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:09:26" (1/1) ... [2021-05-02 17:09:26,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:09:26" (1/1) ... [2021-05-02 17:09:26,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:09:26" (1/1) ... [2021-05-02 17:09:26,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:09:26" (1/1) ... [2021-05-02 17:09:26,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:09:26" (1/1) ... [2021-05-02 17:09:26,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:09:26" (1/1) ... [2021-05-02 17:09:26,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:09:26" (1/1) ... [2021-05-02 17:09:26,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:09:26,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:09:26,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:09:26,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:09:26,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:09:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:09:26,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:09:26,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:09:26,776 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:09:26,776 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:09:26,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:09:26,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:09:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:09:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:09:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:09:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:09:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 17:09:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:09:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:09:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:09:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:09:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:09:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:09:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:09:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:09:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:09:27,059 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:09:27,059 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:09:27,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:09:27 BoogieIcfgContainer [2021-05-02 17:09:27,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:09:27,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:09:27,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:09:27,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:09:27,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:09:26" (1/3) ... [2021-05-02 17:09:27,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5ccf1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:09:27, skipping insertion in model container [2021-05-02 17:09:27,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:09:26" (2/3) ... [2021-05-02 17:09:27,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5ccf1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:09:27, skipping insertion in model container [2021-05-02 17:09:27,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:09:27" (3/3) ... [2021-05-02 17:09:27,066 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound2.c [2021-05-02 17:09:27,071 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:09:27,074 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:09:27,104 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:09:27,139 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:09:27,139 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:09:27,139 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:09:27,139 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:09:27,139 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:09:27,139 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:09:27,139 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:09:27,139 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:09:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:09:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:09:27,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:09:27,169 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:09:27,170 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:09:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:09:27,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2021-05-02 17:09:27,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:09:27,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314509524] [2021-05-02 17:09:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:09:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:09:27,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:09:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:09:27,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:09:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:09:27,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 17:09:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:09:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:09:27,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:09:27,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314509524] [2021-05-02 17:09:27,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314509524] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:09:27,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:09:27,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:09:27,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552766906] [2021-05-02 17:09:27,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:09:27,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:09:27,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:09:27,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:09:27,488 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:09:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:09:27,613 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-05-02 17:09:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:09:27,616 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 17:09:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:09:27,622 INFO L225 Difference]: With dead ends: 51 [2021-05-02 17:09:27,622 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 17:09:27,625 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:09:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 17:09:27,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 17:09:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 17:09:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 17:09:27,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-02 17:09:27,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:09:27,668 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 17:09:27,669 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:09:27,669 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 17:09:27,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:09:27,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:09:27,671 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:09:27,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:09:27,671 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:09:27,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:09:27,676 INFO L82 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2021-05-02 17:09:27,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:09:27,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196381960] [2021-05-02 17:09:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:09:27,709 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:09:27,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803429427] [2021-05-02 17:09:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:09:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:09:27,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:09:27,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:09:27,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:09:27,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:09:27,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196381960] [2021-05-02 17:09:27,937 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:09:27,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803429427] [2021-05-02 17:09:27,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803429427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:09:27,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:09:27,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:09:27,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384906171] [2021-05-02 17:09:27,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:09:27,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:09:27,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:09:27,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:09:27,940 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 17:09:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:09:28,058 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 17:09:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:09:28,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-02 17:09:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:09:28,060 INFO L225 Difference]: With dead ends: 35 [2021-05-02 17:09:28,060 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 17:09:28,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:09:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 17:09:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 17:09:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:09:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-02 17:09:28,070 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-02 17:09:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:09:28,071 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-02 17:09:28,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 17:09:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-02 17:09:28,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 17:09:28,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:09:28,072 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:09:28,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 17:09:28,273 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:09:28,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:09:28,273 INFO L82 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2021-05-02 17:09:28,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:09:28,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640355762] [2021-05-02 17:09:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:09:28,287 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:09:28,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146156586] [2021-05-02 17:09:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:09:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:09:28,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:09:28,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:09:28,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:09:28,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:09:28,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640355762] [2021-05-02 17:09:28,561 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:09:28,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146156586] [2021-05-02 17:09:28,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146156586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:09:28,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:09:28,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:09:28,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968371347] [2021-05-02 17:09:28,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:09:28,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:09:28,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:09:28,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:09:28,564 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 17:09:28,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:09:28,688 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-02 17:09:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:09:28,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 17:09:28,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:09:28,692 INFO L225 Difference]: With dead ends: 42 [2021-05-02 17:09:28,692 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 17:09:28,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:09:28,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 17:09:28,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 17:09:28,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:09:28,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-02 17:09:28,707 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-02 17:09:28,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:09:28,707 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-02 17:09:28,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 17:09:28,708 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-02 17:09:28,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:09:28,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:09:28,712 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:09:28,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:09:28,913 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:09:28,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:09:28,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1415216747, now seen corresponding path program 2 times [2021-05-02 17:09:28,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:09:28,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509907729] [2021-05-02 17:09:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:09:28,926 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:09:28,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836354976] [2021-05-02 17:09:28,927 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:09:29,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:09:29,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:09:29,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:09:29,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:09:29,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 17:09:29,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:09:29,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509907729] [2021-05-02 17:09:29,289 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:09:29,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836354976] [2021-05-02 17:09:29,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836354976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:09:29,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:09:29,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 17:09:29,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399442212] [2021-05-02 17:09:29,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:09:29,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:09:29,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:09:29,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:09:29,292 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:09:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:09:29,488 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-05-02 17:09:29,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:09:29,493 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 17:09:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:09:29,495 INFO L225 Difference]: With dead ends: 51 [2021-05-02 17:09:29,496 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 17:09:29,496 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:09:29,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 17:09:29,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-02 17:09:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:09:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-02 17:09:29,513 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-02 17:09:29,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:09:29,514 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-02 17:09:29,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:09:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-02 17:09:29,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 17:09:29,515 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:09:29,515 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:09:29,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:09:29,720 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:09:29,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:09:29,720 INFO L82 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2021-05-02 17:09:29,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:09:29,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286611249] [2021-05-02 17:09:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:09:29,729 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:09:29,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241789494] [2021-05-02 17:09:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:09:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:09:29,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:09:29,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:09:29,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:29,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:29,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:29,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:29,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:29,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:29,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:29,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:29,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:29,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:29,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:30,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:30,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:30,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:09:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 17:09:30,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:09:30,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286611249] [2021-05-02 17:09:30,053 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:09:30,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241789494] [2021-05-02 17:09:30,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241789494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:09:30,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:09:30,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 17:09:30,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113570360] [2021-05-02 17:09:30,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:09:30,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:09:30,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:09:30,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:09:30,062 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 17:12:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:12:18,287 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-05-02 17:12:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:12:18,288 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2021-05-02 17:12:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:12:18,290 INFO L225 Difference]: With dead ends: 56 [2021-05-02 17:12:18,290 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:12:18,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:12:18,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:12:18,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 17:12:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:12:18,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 17:12:18,299 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-02 17:12:18,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:12:18,299 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 17:12:18,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 17:12:18,300 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 17:12:18,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 17:12:18,301 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:12:18,301 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:12:18,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:12:18,525 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:12:18,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:12:18,525 INFO L82 PathProgramCache]: Analyzing trace with hash 380668603, now seen corresponding path program 3 times [2021-05-02 17:12:18,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:12:18,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702343666] [2021-05-02 17:12:18,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:12:18,535 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:12:18,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938808789] [2021-05-02 17:12:18,535 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 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