/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/geo3-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:00:06,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:00:06,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:00:06,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:00:06,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:00:06,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:00:06,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:00:06,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:00:06,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:00:06,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:00:06,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:00:06,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:00:06,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:00:06,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:00:06,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:00:06,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:00:06,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:00:06,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:00:06,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:00:06,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:00:06,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 03:00:06,589 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:00:06,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:00:06,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:00:06,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:00:06,591 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:00:06,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:00:06,591 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:00:06,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:00:06,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:00:06,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:00:06,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:00:06,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:00:06,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:00:06,592 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:00:06,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:00:06,592 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:00:06,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:00:06,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:00:06,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:00:06,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:00:06,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:00:06,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:00:06,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:00:06,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:00:06,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:00:06,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:00:06,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:00:06,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:00:06,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:00:06,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:00:06,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:00:06,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:00:06,848 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:00:06,864 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:00:06,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound10.c [2021-05-06 03:00:06,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d33ef463/3bc781782d564f00b90fb89721bd2356/FLAGa408be81b [2021-05-06 03:00:07,261 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:00:07,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound10.c [2021-05-06 03:00:07,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d33ef463/3bc781782d564f00b90fb89721bd2356/FLAGa408be81b [2021-05-06 03:00:07,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d33ef463/3bc781782d564f00b90fb89721bd2356 [2021-05-06 03:00:07,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:00:07,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:00:07,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:00:07,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:00:07,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:00:07,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:00:07" (1/1) ... [2021-05-06 03:00:07,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@688f5813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:07, skipping insertion in model container [2021-05-06 03:00:07,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:00:07" (1/1) ... [2021-05-06 03:00:07,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:00:07,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:00:07,773 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/geo3-ll_valuebound10.c[525,538] [2021-05-06 03:00:07,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:00:07,786 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:00:07,793 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/geo3-ll_valuebound10.c[525,538] [2021-05-06 03:00:07,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:00:07,815 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:00:07,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:07 WrapperNode [2021-05-06 03:00:07,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:00:07,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:00:07,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:00:07,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:00:07,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:07" (1/1) ... [2021-05-06 03:00:07,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:07" (1/1) ... [2021-05-06 03:00:07,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:07" (1/1) ... [2021-05-06 03:00:07,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:07" (1/1) ... [2021-05-06 03:00:07,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:07" (1/1) ... [2021-05-06 03:00:07,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:07" (1/1) ... [2021-05-06 03:00:07,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:07" (1/1) ... [2021-05-06 03:00:07,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:00:07,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:00:07,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:00:07,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:00:07,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:00:07,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:00:07,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:00:07,919 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:00:07,920 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:00:07,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:00:07,920 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:00:07,920 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:00:07,920 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:00:07,920 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:00:07,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:00:07,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 03:00:07,921 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:00:07,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:00:07,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:00:07,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:00:07,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:00:07,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:00:07,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:00:07,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:00:07,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:00:08,148 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:00:08,148 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 03:00:08,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:00:08 BoogieIcfgContainer [2021-05-06 03:00:08,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:00:08,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:00:08,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:00:08,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:00:08,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:00:07" (1/3) ... [2021-05-06 03:00:08,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@489fbf8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:00:08, skipping insertion in model container [2021-05-06 03:00:08,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:07" (2/3) ... [2021-05-06 03:00:08,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@489fbf8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:00:08, skipping insertion in model container [2021-05-06 03:00:08,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:00:08" (3/3) ... [2021-05-06 03:00:08,162 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_valuebound10.c [2021-05-06 03:00:08,166 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:00:08,168 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:00:08,178 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:00:08,191 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:00:08,191 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:00:08,191 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:00:08,191 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:00:08,192 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:00:08,192 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:00:08,192 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:00:08,192 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:00:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2021-05-06 03:00:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 03:00:08,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:08,205 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:08,205 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:08,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:08,208 INFO L82 PathProgramCache]: Analyzing trace with hash -779299010, now seen corresponding path program 1 times [2021-05-06 03:00:08,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:08,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195517327] [2021-05-06 03:00:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:08,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:00:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:08,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:00:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:08,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:00:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:08,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-06 03:00:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:00:08,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:08,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195517327] [2021-05-06 03:00:08,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195517327] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:00:08,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:00:08,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:00:08,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660884183] [2021-05-06 03:00:08,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:00:08,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:08,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:00:08,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:00:08,379 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:00:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:08,450 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2021-05-06 03:00:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:00:08,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 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 [2021-05-06 03:00:08,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:08,456 INFO L225 Difference]: With dead ends: 55 [2021-05-06 03:00:08,457 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 03:00:08,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:00:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 03:00:08,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 03:00:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 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) [2021-05-06 03:00:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 03:00:08,482 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 29 [2021-05-06 03:00:08,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:08,482 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 03:00:08,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:00:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 03:00:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 03:00:08,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:08,484 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:08,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:00:08,484 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:08,485 INFO L82 PathProgramCache]: Analyzing trace with hash -963850242, now seen corresponding path program 1 times [2021-05-06 03:00:08,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:08,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796104987] [2021-05-06 03:00:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:08,499 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:08,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753223681] [2021-05-06 03:00:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:08,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:00:08,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:08,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:00:08,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:08,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796104987] [2021-05-06 03:00:08,760 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:08,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753223681] [2021-05-06 03:00:08,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753223681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:00:08,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:00:08,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:00:08,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358677008] [2021-05-06 03:00:08,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:00:08,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:08,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:00:08,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:00:08,762 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:00:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:08,803 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-06 03:00:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:00:08,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 03:00:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:08,805 INFO L225 Difference]: With dead ends: 36 [2021-05-06 03:00:08,805 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:00:08,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:00:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:00:08,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:00:08,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 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) [2021-05-06 03:00:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-06 03:00:08,811 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2021-05-06 03:00:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:08,812 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-06 03:00:08,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:00:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-06 03:00:08,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:00:08,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:08,813 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:09,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 03:00:09,023 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:09,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:09,024 INFO L82 PathProgramCache]: Analyzing trace with hash -425626518, now seen corresponding path program 1 times [2021-05-06 03:00:09,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:09,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706372656] [2021-05-06 03:00:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:09,044 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:09,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290124165] [2021-05-06 03:00:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:09,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 03:00:09,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:09,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:09,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:09,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:00:09,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:09,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706372656] [2021-05-06 03:00:09,345 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:09,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290124165] [2021-05-06 03:00:09,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290124165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:00:09,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:00:09,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:00:09,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801224067] [2021-05-06 03:00:09,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:00:09,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:09,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:00:09,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:00:09,349 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:00:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:09,725 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-05-06 03:00:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:00:09,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 03:00:09,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:09,726 INFO L225 Difference]: With dead ends: 43 [2021-05-06 03:00:09,726 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 03:00:09,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:00:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 03:00:09,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 03:00:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 03:00:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-05-06 03:00:09,734 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2021-05-06 03:00:09,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:09,734 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-05-06 03:00:09,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:00:09,734 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-05-06 03:00:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 03:00:09,735 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:09,735 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:09,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:09,949 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:09,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:09,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1540046462, now seen corresponding path program 2 times [2021-05-06 03:00:09,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:09,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284865145] [2021-05-06 03:00:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:09,966 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:09,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008035480] [2021-05-06 03:00:09,966 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 [2021-05-06 03:00:10,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:00:10,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:00:10,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 03:00:10,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:10,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:10,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:10,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 03:00:10,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:10,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284865145] [2021-05-06 03:00:10,364 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:10,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008035480] [2021-05-06 03:00:10,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008035480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:00:10,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:00:10,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:00:10,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465445004] [2021-05-06 03:00:10,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:00:10,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:10,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:00:10,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:00:10,366 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:00:10,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:10,512 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-06 03:00:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:00:10,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2021-05-06 03:00:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:10,513 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:00:10,514 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 03:00:10,514 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:00:10,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 03:00:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 03:00:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 7 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 03:00:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-05-06 03:00:10,520 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 43 [2021-05-06 03:00:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:10,520 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-05-06 03:00:10,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:00:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-05-06 03:00:10,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 03:00:10,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:10,521 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:10,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:10,722 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:10,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1099019754, now seen corresponding path program 3 times [2021-05-06 03:00:10,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:10,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620979877] [2021-05-06 03:00:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:10,731 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:10,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401042690] [2021-05-06 03:00:10,732 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:11,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 03:00:11,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:00:11,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 03:00:11,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:16,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:16,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:16,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:16,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 03:00:16,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:16,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620979877] [2021-05-06 03:00:16,905 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:16,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401042690] [2021-05-06 03:00:16,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401042690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:00:16,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:00:16,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:00:16,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818497107] [2021-05-06 03:00:16,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:00:16,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:16,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:00:16,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:00:16,906 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:00:23,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:23,682 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-05-06 03:00:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:00:23,683 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2021-05-06 03:00:23,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:23,683 INFO L225 Difference]: With dead ends: 47 [2021-05-06 03:00:23,683 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 03:00:23,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 5194.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:00:23,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 03:00:23,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 03:00:23,684 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 03:00:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 03:00:23,684 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2021-05-06 03:00:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:23,684 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 03:00:23,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:00:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 03:00:23,684 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 03:00:23,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:23,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.