/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/geo2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:49:09,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:49:09,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:49:09,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:49:09,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:49:09,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:49:09,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:49:09,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:49:09,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:49:09,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:49:09,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:49:09,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:49:09,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:49:09,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:49:09,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:49:09,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:49:09,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:49:09,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:49:09,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:49:09,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:49:09,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:49:09,623 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:49:09,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:49:09,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:49:09,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:49:09,625 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:49:09,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:49:09,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:49:09,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:49:09,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:49:09,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:49:09,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:49:09,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:49:09,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:49:09,627 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:49:09,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:49:09,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:49:09,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:49:09,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:49:09,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:49:09,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:49:09,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:49:09,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:49:09,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:49:09,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:49:09,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:49:09,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:49:09,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:49:09,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:49:09,628 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:49:09,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:49:09,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:49:09,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:49:09,906 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:49:09,907 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:49:09,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound10.c [2021-05-06 02:49:09,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5904bcc8e/d35d1081cba64d94965d533b71facf66/FLAGb55ec9740 [2021-05-06 02:49:10,294 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:49:10,294 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound10.c [2021-05-06 02:49:10,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5904bcc8e/d35d1081cba64d94965d533b71facf66/FLAGb55ec9740 [2021-05-06 02:49:10,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5904bcc8e/d35d1081cba64d94965d533b71facf66 [2021-05-06 02:49:10,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:49:10,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:49:10,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:49:10,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:49:10,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:49:10,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:49:10" (1/1) ... [2021-05-06 02:49:10,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c881de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:10, skipping insertion in model container [2021-05-06 02:49:10,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:49:10" (1/1) ... [2021-05-06 02:49:10,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:49:10,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:49:10,401 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/geo2-ll_valuebound10.c[525,538] [2021-05-06 02:49:10,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:49:10,424 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:49:10,433 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/geo2-ll_valuebound10.c[525,538] [2021-05-06 02:49:10,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:49:10,454 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:49:10,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:10 WrapperNode [2021-05-06 02:49:10,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:49:10,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:49:10,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:49:10,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:49:10,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:10" (1/1) ... [2021-05-06 02:49:10,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:10" (1/1) ... [2021-05-06 02:49:10,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:10" (1/1) ... [2021-05-06 02:49:10,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:10" (1/1) ... [2021-05-06 02:49:10,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:10" (1/1) ... [2021-05-06 02:49:10,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:10" (1/1) ... [2021-05-06 02:49:10,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:10" (1/1) ... [2021-05-06 02:49:10,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:49:10,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:49:10,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:49:10,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:49:10,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:49:10,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:49:10,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:49:10,595 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:49:10,595 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:49:10,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:49:10,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:49:10,595 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:49:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:49:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:49:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:49:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:49:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:49:10,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:49:10,597 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:49:10,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:49:10,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:49:10,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:49:10,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:49:10,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:49:10,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:49:10,780 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:49:10,781 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:49:10,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:49:10 BoogieIcfgContainer [2021-05-06 02:49:10,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:49:10,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:49:10,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:49:10,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:49:10,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:49:10" (1/3) ... [2021-05-06 02:49:10,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b17f71e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:49:10, skipping insertion in model container [2021-05-06 02:49:10,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:10" (2/3) ... [2021-05-06 02:49:10,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b17f71e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:49:10, skipping insertion in model container [2021-05-06 02:49:10,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:49:10" (3/3) ... [2021-05-06 02:49:10,801 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound10.c [2021-05-06 02:49:10,805 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:49:10,807 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:49:10,816 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:49:10,829 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:49:10,829 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:49:10,829 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:49:10,829 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:49:10,829 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:49:10,830 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:49:10,830 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:49:10,830 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:49:10,861 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:49:10,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:49:10,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:10,865 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:49:10,865 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:10,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:10,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1276201559, now seen corresponding path program 1 times [2021-05-06 02:49:10,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:10,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657108561] [2021-05-06 02:49:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:11,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:49:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:11,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:49:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:11,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:49:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:49:11,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:11,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657108561] [2021-05-06 02:49:11,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657108561] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:49:11,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:49:11,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:49:11,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816085754] [2021-05-06 02:49:11,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:49:11,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:11,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:49:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:49:11,111 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2021-05-06 02:49:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:11,188 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2021-05-06 02:49:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:49:11,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 23 [2021-05-06 02:49:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:11,194 INFO L225 Difference]: With dead ends: 51 [2021-05-06 02:49:11,194 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 02:49:11,196 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:49:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 02:49:11,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 02:49:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:49:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-06 02:49:11,227 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2021-05-06 02:49:11,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:11,228 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-06 02:49:11,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2021-05-06 02:49:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-06 02:49:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:49:11,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:11,229 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:49:11,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:49:11,230 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:11,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1874219407, now seen corresponding path program 1 times [2021-05-06 02:49:11,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:11,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417424201] [2021-05-06 02:49:11,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:11,260 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:11,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047412682] [2021-05-06 02:49:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:49:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:11,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:49:11,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:11,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:49:11,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:11,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417424201] [2021-05-06 02:49:11,454 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:11,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047412682] [2021-05-06 02:49:11,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047412682] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:49:11,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:49:11,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:49:11,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810427795] [2021-05-06 02:49:11,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:49:11,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:11,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:49:11,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:49:11,459 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:49:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:11,504 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 02:49:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:49:11,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 02:49:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:11,507 INFO L225 Difference]: With dead ends: 34 [2021-05-06 02:49:11,507 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 02:49:11,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:49:11,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 02:49:11,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 02:49:11,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:49:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-06 02:49:11,520 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2021-05-06 02:49:11,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:11,522 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-06 02:49:11,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:49:11,523 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-06 02:49:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 02:49:11,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:11,524 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, 1] [2021-05-06 02:49:11,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:49:11,736 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 156588053, now seen corresponding path program 1 times [2021-05-06 02:49:11,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:11,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61139911] [2021-05-06 02:49:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:11,745 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:11,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989052717] [2021-05-06 02:49:11,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:49:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:11,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:49:11,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:11,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:11,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:11,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:49:11,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:11,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61139911] [2021-05-06 02:49:11,930 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:11,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989052717] [2021-05-06 02:49:11,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989052717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:49:11,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:49:11,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:49:11,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603679461] [2021-05-06 02:49:11,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:49:11,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:11,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:49:11,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:49:11,932 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:49:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:11,984 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-06 02:49:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:49:11,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 02:49:11,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:11,985 INFO L225 Difference]: With dead ends: 41 [2021-05-06 02:49:11,985 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 02:49:11,985 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:49:11,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 02:49:11,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 02:49:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:49:11,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-06 02:49:11,990 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2021-05-06 02:49:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:11,991 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-06 02:49:11,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:49:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-06 02:49:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:49:11,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:11,991 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, 1] [2021-05-06 02:49:12,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:49:12,201 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:12,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1865789967, now seen corresponding path program 2 times [2021-05-06 02:49:12,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:12,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347511006] [2021-05-06 02:49:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:12,211 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:12,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735589573] [2021-05-06 02:49:12,211 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 02:49:12,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:49:12,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:49:12,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:49:12,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:12,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:12,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:12,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:12,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:12,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:12,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:12,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:12,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:12,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:12,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 02:49:12,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:12,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347511006] [2021-05-06 02:49:12,598 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:12,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735589573] [2021-05-06 02:49:12,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735589573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:49:12,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:49:12,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:49:12,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772697656] [2021-05-06 02:49:12,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:49:12,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:12,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:49:12,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:49:12,599 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:49:54,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:54,112 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-05-06 02:49:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:49:54,113 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-06 02:49:54,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:54,114 INFO L225 Difference]: With dead ends: 48 [2021-05-06 02:49:54,114 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 02:49:54,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:49:54,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 02:49:54,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 02:49:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 02:49:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-05-06 02:49:54,119 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2021-05-06 02:49:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:54,120 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-05-06 02:49:54,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:49:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-05-06 02:49:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:49:54,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:54,124 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, 1] [2021-05-06 02:49:54,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:49:54,327 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:54,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:54,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1145718933, now seen corresponding path program 3 times [2021-05-06 02:49:54,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:54,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983080441] [2021-05-06 02:49:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:54,335 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:54,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085104544] [2021-05-06 02:49:54,335 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 02:49:54,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 02:49:54,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:49:54,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:49:54,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:54,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-06 02:49:54,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:54,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983080441] [2021-05-06 02:49:54,679 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:54,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085104544] [2021-05-06 02:49:54,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085104544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:49:54,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:49:54,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:49:54,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599909595] [2021-05-06 02:49:54,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:49:54,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:54,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:49:54,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:49:54,681 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5)