/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/egcd3-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:59:32,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:59:32,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:59:32,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:59:32,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:59:32,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:59:32,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:59:32,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:59:32,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:59:32,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:59:32,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:59:32,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:59:32,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:59:32,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:59:32,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:59:32,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:59:32,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:59:32,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:59:32,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:59:32,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:59:32,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:59:32,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:59:32,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:59:32,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:59:32,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:59:32,249 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:59:32,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:59:32,249 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:59:32,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:59:32,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:59:32,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:59:32,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:59:32,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:59:32,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:59:32,250 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:59:32,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:59:32,251 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:59:32,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:59:32,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:59:32,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:59:32,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:59:32,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:59:32,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:59:32,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:59:32,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:59:32,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:59:32,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:59:32,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:59:32,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:59:32,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:59:32,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:59:32,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:59:32,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:59:32,506 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:59:32,507 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:59:32,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2021-05-02 14:59:32,554 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7b557b74/e312dc6fe57043a5bb0902b9088d232e/FLAGf4e1a7137 [2021-05-02 14:59:32,882 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:59:32,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2021-05-02 14:59:32,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7b557b74/e312dc6fe57043a5bb0902b9088d232e/FLAGf4e1a7137 [2021-05-02 14:59:33,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7b557b74/e312dc6fe57043a5bb0902b9088d232e [2021-05-02 14:59:33,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:59:33,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:59:33,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:59:33,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:59:33,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:59:33,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:59:33" (1/1) ... [2021-05-02 14:59:33,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@511cb620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:33, skipping insertion in model container [2021-05-02 14:59:33,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:59:33" (1/1) ... [2021-05-02 14:59:33,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:59:33,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:59:33,384 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/egcd3-ll_unwindbound20.c[490,503] [2021-05-02 14:59:33,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:59:33,404 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:59:33,416 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/egcd3-ll_unwindbound20.c[490,503] [2021-05-02 14:59:33,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:59:33,446 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:59:33,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:33 WrapperNode [2021-05-02 14:59:33,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:59:33,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:59:33,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:59:33,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:59:33,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:33" (1/1) ... [2021-05-02 14:59:33,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:33" (1/1) ... [2021-05-02 14:59:33,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:33" (1/1) ... [2021-05-02 14:59:33,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:33" (1/1) ... [2021-05-02 14:59:33,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:33" (1/1) ... [2021-05-02 14:59:33,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:33" (1/1) ... [2021-05-02 14:59:33,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:33" (1/1) ... [2021-05-02 14:59:33,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:59:33,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:59:33,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:59:33,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:59:33,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:59:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:59:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:59:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:59:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:59:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:59:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:59:33,554 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:59:33,554 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:59:33,554 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:59:33,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:59:33,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:59:33,555 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:59:33,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:59:33,555 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:59:33,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:59:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:59:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:59:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:59:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:59:33,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:59:33,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:59:33,794 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 14:59:33,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:59:33 BoogieIcfgContainer [2021-05-02 14:59:33,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:59:33,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:59:33,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:59:33,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:59:33,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:59:33" (1/3) ... [2021-05-02 14:59:33,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f04b2f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:59:33, skipping insertion in model container [2021-05-02 14:59:33,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:33" (2/3) ... [2021-05-02 14:59:33,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f04b2f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:59:33, skipping insertion in model container [2021-05-02 14:59:33,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:59:33" (3/3) ... [2021-05-02 14:59:33,800 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.c [2021-05-02 14:59:33,820 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:59:33,822 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:59:33,832 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:59:33,848 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:59:33,848 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:59:33,849 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:59:33,849 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:59:33,849 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:59:33,849 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:59:33,849 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:59:33,849 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:59:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:59:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 14:59:33,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:33,868 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:33,868 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2021-05-02 14:59:33,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:33,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740073896] [2021-05-02 14:59:33,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:34,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:59:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:34,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:59:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:34,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:59:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:34,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:34,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740073896] [2021-05-02 14:59:34,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740073896] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:34,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:34,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:59:34,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924600476] [2021-05-02 14:59:34,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:59:34,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:34,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:59:34,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:59:34,063 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:34,198 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2021-05-02 14:59:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:59:34,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 14:59:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:34,204 INFO L225 Difference]: With dead ends: 74 [2021-05-02 14:59:34,204 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 14:59:34,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:59:34,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 14:59:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 14:59:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:59:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-02 14:59:34,246 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-02 14:59:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:34,246 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-02 14:59:34,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:34,247 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-02 14:59:34,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:59:34,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:34,248 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] [2021-05-02 14:59:34,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:59:34,249 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:34,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:34,249 INFO L82 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2021-05-02 14:59:34,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:34,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765014307] [2021-05-02 14:59:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:34,278 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:34,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040947131] [2021-05-02 14:59:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:34,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:59:34,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:34,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:34,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:34,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:34,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:34,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:34,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:34,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765014307] [2021-05-02 14:59:34,453 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:34,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040947131] [2021-05-02 14:59:34,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040947131] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:34,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:34,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:59:34,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687208355] [2021-05-02 14:59:34,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 14:59:34,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:34,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 14:59:34,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:59:34,455 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:34,466 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-05-02 14:59:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 14:59:34,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 14:59:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:34,467 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:59:34,467 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 14:59:34,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:59:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 14:59:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 14:59:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:59:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-02 14:59:34,472 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-02 14:59:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:34,473 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-02 14:59:34,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-02 14:59:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 14:59:34,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:34,474 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:34,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:59:34,677 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:34,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:34,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2021-05-02 14:59:34,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:34,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020444235] [2021-05-02 14:59:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:34,690 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:34,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602360735] [2021-05-02 14:59:34,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:59:34,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:34,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:59:34,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:34,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020444235] [2021-05-02 14:59:34,792 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:34,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602360735] [2021-05-02 14:59:34,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602360735] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:34,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:34,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 14:59:34,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230469722] [2021-05-02 14:59:34,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:59:34,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:34,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:59:34,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:59:34,794 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:59:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:34,864 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-05-02 14:59:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:59:34,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-02 14:59:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:34,868 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:59:34,868 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 14:59:34,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:59:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 14:59:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-02 14:59:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:59:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-02 14:59:34,882 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-02 14:59:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:34,883 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-02 14:59:34,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:59:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-02 14:59:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:59:34,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:34,884 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:35,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:35,103 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:35,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2021-05-02 14:59:35,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:35,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075313438] [2021-05-02 14:59:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:35,121 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:35,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623580955] [2021-05-02 14:59:35,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:35,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:59:35,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:35,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:35,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:35,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075313438] [2021-05-02 14:59:35,251 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:35,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623580955] [2021-05-02 14:59:35,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623580955] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:35,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:35,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:59:35,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275029313] [2021-05-02 14:59:35,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:59:35,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:35,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:59:35,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:59:35,253 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:35,277 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2021-05-02 14:59:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:59:35,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 14:59:35,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:35,280 INFO L225 Difference]: With dead ends: 62 [2021-05-02 14:59:35,280 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 14:59:35,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:59:35,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 14:59:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 14:59:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:59:35,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 14:59:35,292 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-02 14:59:35,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:35,292 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 14:59:35,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 14:59:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:59:35,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:35,293 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:35,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:35,501 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:35,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:35,502 INFO L82 PathProgramCache]: Analyzing trace with hash 795698770, now seen corresponding path program 1 times [2021-05-02 14:59:35,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:35,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237401544] [2021-05-02 14:59:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:35,519 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:35,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264377556] [2021-05-02 14:59:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:35,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:59:35,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:35,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:35,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:35,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237401544] [2021-05-02 14:59:35,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:35,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264377556] [2021-05-02 14:59:35,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264377556] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:35,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:35,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:59:35,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616441519] [2021-05-02 14:59:35,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:59:35,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:35,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:59:35,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:59:35,674 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:35,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:35,756 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2021-05-02 14:59:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:59:35,757 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 14:59:35,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:35,757 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:59:35,757 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 14:59:35,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:59:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 14:59:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 14:59:35,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:59:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-02 14:59:35,762 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-02 14:59:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:35,762 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-02 14:59:35,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-02 14:59:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 14:59:35,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:35,763 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:35,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:35,969 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:35,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:35,969 INFO L82 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2021-05-02 14:59:35,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:35,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135591324] [2021-05-02 14:59:35,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:35,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:35,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802002852] [2021-05-02 14:59:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:36,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:59:36,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:36,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:36,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:36,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135591324] [2021-05-02 14:59:36,120 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:36,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802002852] [2021-05-02 14:59:36,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802002852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:36,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:36,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:59:36,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220845424] [2021-05-02 14:59:36,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:59:36,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:36,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:59:36,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:59:36,121 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:36,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:36,157 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2021-05-02 14:59:36,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:59:36,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-05-02 14:59:36,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:36,160 INFO L225 Difference]: With dead ends: 67 [2021-05-02 14:59:36,160 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 14:59:36,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:59:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 14:59:36,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 14:59:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:59:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-02 14:59:36,166 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-02 14:59:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:36,166 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-02 14:59:36,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-02 14:59:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 14:59:36,167 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:36,167 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:36,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:59:36,382 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:36,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:36,383 INFO L82 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2021-05-02 14:59:36,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:36,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863330700] [2021-05-02 14:59:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:36,390 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:36,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015685676] [2021-05-02 14:59:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:36,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:59:36,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:36,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:59:36,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:36,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863330700] [2021-05-02 14:59:36,506 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:36,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015685676] [2021-05-02 14:59:36,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015685676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:36,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:36,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:59:36,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088330400] [2021-05-02 14:59:36,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:59:36,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:36,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:59:36,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:59:36,507 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:36,646 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2021-05-02 14:59:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:59:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 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 31 [2021-05-02 14:59:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:36,647 INFO L225 Difference]: With dead ends: 138 [2021-05-02 14:59:36,647 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 14:59:36,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:59:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 14:59:36,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-02 14:59:36,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:59:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-02 14:59:36,657 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-02 14:59:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:36,657 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-02 14:59:36,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-02 14:59:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:59:36,658 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:36,658 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:36,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:36,875 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:36,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:36,875 INFO L82 PathProgramCache]: Analyzing trace with hash 495607521, now seen corresponding path program 1 times [2021-05-02 14:59:36,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:36,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696178036] [2021-05-02 14:59:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:36,883 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:36,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681852667] [2021-05-02 14:59:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:36,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:59:36,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:36,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:36,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:59:37,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:37,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696178036] [2021-05-02 14:59:37,030 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:37,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681852667] [2021-05-02 14:59:37,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681852667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:37,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:37,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:59:37,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106218628] [2021-05-02 14:59:37,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:59:37,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:37,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:59:37,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:59:37,031 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:59:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:37,110 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2021-05-02 14:59:37,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:59:37,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 14:59:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:37,112 INFO L225 Difference]: With dead ends: 95 [2021-05-02 14:59:37,112 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 14:59:37,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:59:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 14:59:37,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 14:59:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:59:37,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-02 14:59:37,120 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-02 14:59:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:37,120 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-02 14:59:37,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:59:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-02 14:59:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 14:59:37,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:37,121 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:37,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:37,336 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 1 times [2021-05-02 14:59:37,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:37,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054475055] [2021-05-02 14:59:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:37,345 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:37,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666036493] [2021-05-02 14:59:37,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:37,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:59:37,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:37,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:37,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:37,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054475055] [2021-05-02 14:59:37,478 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:37,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666036493] [2021-05-02 14:59:37,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666036493] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:37,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:37,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 14:59:37,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587803714] [2021-05-02 14:59:37,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:59:37,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:37,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:59:37,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:59:37,480 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:37,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:37,506 INFO L93 Difference]: Finished difference Result 135 states and 184 transitions. [2021-05-02 14:59:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:59:37,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-05-02 14:59:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:37,507 INFO L225 Difference]: With dead ends: 135 [2021-05-02 14:59:37,507 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 14:59:37,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:59:37,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 14:59:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-02 14:59:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:59:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-02 14:59:37,524 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-02 14:59:37,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:37,524 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-02 14:59:37,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:37,524 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-02 14:59:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 14:59:37,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:37,525 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:37,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:59:37,729 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:37,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:37,729 INFO L82 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 1 times [2021-05-02 14:59:37,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:37,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898129060] [2021-05-02 14:59:37,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:37,737 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:37,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682973445] [2021-05-02 14:59:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:37,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:59:37,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:37,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:37,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:37,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898129060] [2021-05-02 14:59:37,859 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:37,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682973445] [2021-05-02 14:59:37,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682973445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:37,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:37,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:59:37,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990803448] [2021-05-02 14:59:37,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:59:37,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:37,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:59:37,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:59:37,860 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:37,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:37,908 INFO L93 Difference]: Finished difference Result 171 states and 233 transitions. [2021-05-02 14:59:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:59:37,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 14:59:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:37,909 INFO L225 Difference]: With dead ends: 171 [2021-05-02 14:59:37,909 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 14:59:37,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:59:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 14:59:37,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-02 14:59:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 14:59:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-02 14:59:37,916 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-02 14:59:37,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:37,917 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-02 14:59:37,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:37,917 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-02 14:59:37,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 14:59:37,917 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:37,917 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:38,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:38,129 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:38,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2021-05-02 14:59:38,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:38,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211402203] [2021-05-02 14:59:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:38,140 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:38,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515206078] [2021-05-02 14:59:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:38,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:59:38,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:38,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:59:38,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:38,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211402203] [2021-05-02 14:59:38,294 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:38,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515206078] [2021-05-02 14:59:38,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515206078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:38,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:38,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:59:38,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939472885] [2021-05-02 14:59:38,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:59:38,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:38,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:59:38,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:59:38,296 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:38,397 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2021-05-02 14:59:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:59:38,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 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 36 [2021-05-02 14:59:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:38,400 INFO L225 Difference]: With dead ends: 154 [2021-05-02 14:59:38,400 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 14:59:38,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:59:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 14:59:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-02 14:59:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 14:59:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-02 14:59:38,412 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-02 14:59:38,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:38,412 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-02 14:59:38,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-02 14:59:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 14:59:38,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:38,413 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:38,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:38,628 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:38,629 INFO L82 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 2 times [2021-05-02 14:59:38,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:38,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112162855] [2021-05-02 14:59:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:38,640 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:38,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241308845] [2021-05-02 14:59:38,640 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:38,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:38,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:38,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:59:38,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:38,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:38,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:38,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112162855] [2021-05-02 14:59:38,760 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:38,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241308845] [2021-05-02 14:59:38,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241308845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:38,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:38,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:59:38,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930628778] [2021-05-02 14:59:38,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:59:38,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:38,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:59:38,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:59:38,761 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:38,825 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2021-05-02 14:59:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:59:38,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-05-02 14:59:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:38,827 INFO L225 Difference]: With dead ends: 189 [2021-05-02 14:59:38,827 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 14:59:38,828 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:59:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 14:59:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-02 14:59:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 14:59:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-02 14:59:38,839 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-02 14:59:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:38,840 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-02 14:59:38,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-02 14:59:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:59:38,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:38,841 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:39,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:59:39,055 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:39,056 INFO L82 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2021-05-02 14:59:39,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:39,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68763307] [2021-05-02 14:59:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:39,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:39,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245761830] [2021-05-02 14:59:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:39,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:59:39,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:39,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 14:59:39,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:39,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68763307] [2021-05-02 14:59:39,206 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:39,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245761830] [2021-05-02 14:59:39,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245761830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:39,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:39,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:59:39,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316970617] [2021-05-02 14:59:39,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:59:39,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:39,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:59:39,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:59:39,207 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:59:39,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:39,330 INFO L93 Difference]: Finished difference Result 195 states and 258 transitions. [2021-05-02 14:59:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:59:39,330 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 14:59:39,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:39,335 INFO L225 Difference]: With dead ends: 195 [2021-05-02 14:59:39,335 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 14:59:39,336 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:59:39,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 14:59:39,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 14:59:39,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 14:59:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-02 14:59:39,347 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-02 14:59:39,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:39,347 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-02 14:59:39,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:59:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-02 14:59:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:59:39,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:39,348 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:39,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:59:39,563 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:39,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:39,563 INFO L82 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2021-05-02 14:59:39,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:39,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701518041] [2021-05-02 14:59:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:39,570 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:39,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781596483] [2021-05-02 14:59:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:39,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:59:39,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:39,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:59:39,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:39,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701518041] [2021-05-02 14:59:39,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:39,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781596483] [2021-05-02 14:59:39,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781596483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:39,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:39,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:59:39,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12260072] [2021-05-02 14:59:39,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:59:39,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:39,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:59:39,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:59:39,743 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:59:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:39,922 INFO L93 Difference]: Finished difference Result 200 states and 260 transitions. [2021-05-02 14:59:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:59:39,922 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-05-02 14:59:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:39,923 INFO L225 Difference]: With dead ends: 200 [2021-05-02 14:59:39,923 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 14:59:39,923 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:59:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 14:59:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2021-05-02 14:59:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 142 states have (on average 1.295774647887324) internal successors, (184), 144 states have internal predecessors, (184), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 14:59:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 256 transitions. [2021-05-02 14:59:39,932 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 256 transitions. Word has length 41 [2021-05-02 14:59:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:39,932 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 256 transitions. [2021-05-02 14:59:39,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:59:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 256 transitions. [2021-05-02 14:59:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 14:59:39,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:39,933 INFO L523 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:40,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:59:40,147 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:40,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2021-05-02 14:59:40,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:40,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808247701] [2021-05-02 14:59:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:40,163 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:40,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099517476] [2021-05-02 14:59:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:40,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:59:40,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:40,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 14:59:40,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:40,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808247701] [2021-05-02 14:59:40,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:40,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099517476] [2021-05-02 14:59:40,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099517476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:40,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:40,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:59:40,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346765260] [2021-05-02 14:59:40,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:59:40,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:40,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:59:40,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:59:40,288 INFO L87 Difference]: Start difference. First operand 196 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:59:40,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:40,350 INFO L93 Difference]: Finished difference Result 260 states and 359 transitions. [2021-05-02 14:59:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:59:40,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-05-02 14:59:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:40,351 INFO L225 Difference]: With dead ends: 260 [2021-05-02 14:59:40,351 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 14:59:40,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:59:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 14:59:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 230. [2021-05-02 14:59:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 155 states have (on average 1.2967741935483872) internal successors, (201), 162 states have internal predecessors, (201), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 14:59:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 313 transitions. [2021-05-02 14:59:40,362 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 313 transitions. Word has length 44 [2021-05-02 14:59:40,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:40,362 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 313 transitions. [2021-05-02 14:59:40,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:59:40,363 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 313 transitions. [2021-05-02 14:59:40,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 14:59:40,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:40,363 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:40,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:40,578 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:40,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:40,578 INFO L82 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 1 times [2021-05-02 14:59:40,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:40,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089118653] [2021-05-02 14:59:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:40,583 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:40,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510119517] [2021-05-02 14:59:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:40,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:59:40,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:40,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:40,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:40,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089118653] [2021-05-02 14:59:40,713 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:40,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510119517] [2021-05-02 14:59:40,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510119517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:40,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:40,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:59:40,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481388591] [2021-05-02 14:59:40,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:59:40,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:40,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:59:40,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:59:40,714 INFO L87 Difference]: Start difference. First operand 230 states and 313 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:40,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:40,780 INFO L93 Difference]: Finished difference Result 379 states and 536 transitions. [2021-05-02 14:59:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:59:40,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-05-02 14:59:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:40,781 INFO L225 Difference]: With dead ends: 379 [2021-05-02 14:59:40,781 INFO L226 Difference]: Without dead ends: 241 [2021-05-02 14:59:40,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:59:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-02 14:59:40,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2021-05-02 14:59:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 162 states have (on average 1.2839506172839505) internal successors, (208), 168 states have internal predecessors, (208), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 14:59:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 320 transitions. [2021-05-02 14:59:40,794 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 320 transitions. Word has length 42 [2021-05-02 14:59:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:40,794 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 320 transitions. [2021-05-02 14:59:40,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 320 transitions. [2021-05-02 14:59:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:59:40,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:40,794 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:41,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:59:41,009 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:41,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1912500411, now seen corresponding path program 2 times [2021-05-02 14:59:41,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:41,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327353889] [2021-05-02 14:59:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:41,014 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:41,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658513995] [2021-05-02 14:59:41,014 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:41,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:41,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:41,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:59:41,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:41,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 14:59:41,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:41,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327353889] [2021-05-02 14:59:41,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:41,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658513995] [2021-05-02 14:59:41,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658513995] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:41,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:41,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:59:41,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438930170] [2021-05-02 14:59:41,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:59:41,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:41,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:59:41,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:59:41,116 INFO L87 Difference]: Start difference. First operand 237 states and 320 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-05-02 14:59:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:41,206 INFO L93 Difference]: Finished difference Result 445 states and 659 transitions. [2021-05-02 14:59:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:59:41,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 43 [2021-05-02 14:59:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:41,208 INFO L225 Difference]: With dead ends: 445 [2021-05-02 14:59:41,208 INFO L226 Difference]: Without dead ends: 375 [2021-05-02 14:59:41,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:59:41,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-02 14:59:41,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 261. [2021-05-02 14:59:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 192 states have internal predecessors, (242), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 14:59:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 354 transitions. [2021-05-02 14:59:41,225 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 354 transitions. Word has length 43 [2021-05-02 14:59:41,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:41,225 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 354 transitions. [2021-05-02 14:59:41,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-05-02 14:59:41,225 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 354 transitions. [2021-05-02 14:59:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 14:59:41,225 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:41,225 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:41,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:59:41,440 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:41,440 INFO L82 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2021-05-02 14:59:41,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:41,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208758234] [2021-05-02 14:59:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:41,445 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:41,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146207549] [2021-05-02 14:59:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:41,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 14:59:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:41,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 14:59:41,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:41,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208758234] [2021-05-02 14:59:41,583 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:41,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146207549] [2021-05-02 14:59:41,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146207549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:41,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:41,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:59:41,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186762305] [2021-05-02 14:59:41,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:59:41,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:41,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:59:41,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:59:41,585 INFO L87 Difference]: Start difference. First operand 261 states and 354 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 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) [2021-05-02 14:59:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:41,801 INFO L93 Difference]: Finished difference Result 337 states and 476 transitions. [2021-05-02 14:59:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:59:41,801 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 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 46 [2021-05-02 14:59:41,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:41,803 INFO L225 Difference]: With dead ends: 337 [2021-05-02 14:59:41,803 INFO L226 Difference]: Without dead ends: 335 [2021-05-02 14:59:41,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:59:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-02 14:59:41,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 292. [2021-05-02 14:59:41,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 200 states have (on average 1.315) internal successors, (263), 208 states have internal predecessors, (263), 73 states have call successors, (73), 19 states have call predecessors, (73), 18 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 14:59:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 407 transitions. [2021-05-02 14:59:41,820 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 407 transitions. Word has length 46 [2021-05-02 14:59:41,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:41,820 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 407 transitions. [2021-05-02 14:59:41,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 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) [2021-05-02 14:59:41,820 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 407 transitions. [2021-05-02 14:59:41,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 14:59:41,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:41,821 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:42,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:59:42,033 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:42,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:42,033 INFO L82 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2021-05-02 14:59:42,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:42,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425114760] [2021-05-02 14:59:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:42,038 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:42,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879825062] [2021-05-02 14:59:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:42,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 14:59:42,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:42,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:42,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:42,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:42,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:42,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:42,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:42,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:42,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:42,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:42,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:42,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:42,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:59:42,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:42,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425114760] [2021-05-02 14:59:42,406 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:42,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879825062] [2021-05-02 14:59:42,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879825062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:42,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:42,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:59:42,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415921265] [2021-05-02 14:59:42,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:59:42,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:42,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:59:42,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:59:42,408 INFO L87 Difference]: Start difference. First operand 292 states and 407 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:42,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:42,861 INFO L93 Difference]: Finished difference Result 421 states and 594 transitions. [2021-05-02 14:59:42,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:59:42,862 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2021-05-02 14:59:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:42,863 INFO L225 Difference]: With dead ends: 421 [2021-05-02 14:59:42,863 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 14:59:42,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 348.6ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 14:59:42,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 14:59:42,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2021-05-02 14:59:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 217 states have (on average 1.3133640552995391) internal successors, (285), 226 states have internal predecessors, (285), 81 states have call successors, (81), 21 states have call predecessors, (81), 20 states have return successors, (79), 71 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 14:59:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2021-05-02 14:59:42,881 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 58 [2021-05-02 14:59:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:42,881 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2021-05-02 14:59:42,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2021-05-02 14:59:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 14:59:42,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:42,882 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:43,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:43,097 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:43,097 INFO L82 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 1 times [2021-05-02 14:59:43,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:43,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022234500] [2021-05-02 14:59:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:43,104 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:43,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068076088] [2021-05-02 14:59:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:43,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:59:43,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:43,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:43,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:43,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022234500] [2021-05-02 14:59:43,292 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:43,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068076088] [2021-05-02 14:59:43,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068076088] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:43,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:43,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:59:43,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65898821] [2021-05-02 14:59:43,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:59:43,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:43,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:59:43,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:59:43,294 INFO L87 Difference]: Start difference. First operand 319 states and 445 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:43,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:43,428 INFO L93 Difference]: Finished difference Result 508 states and 703 transitions. [2021-05-02 14:59:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:59:43,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2021-05-02 14:59:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:43,431 INFO L225 Difference]: With dead ends: 508 [2021-05-02 14:59:43,431 INFO L226 Difference]: Without dead ends: 376 [2021-05-02 14:59:43,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:59:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-02 14:59:43,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 363. [2021-05-02 14:59:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 249 states have (on average 1.2811244979919678) internal successors, (319), 257 states have internal predecessors, (319), 85 states have call successors, (85), 29 states have call predecessors, (85), 28 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 14:59:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 487 transitions. [2021-05-02 14:59:43,456 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 487 transitions. Word has length 63 [2021-05-02 14:59:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:43,456 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 487 transitions. [2021-05-02 14:59:43,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:43,456 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 487 transitions. [2021-05-02 14:59:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 14:59:43,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:43,458 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:43,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:43,673 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:43,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 1 times [2021-05-02 14:59:43,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:43,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384956711] [2021-05-02 14:59:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:43,702 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:43,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624941936] [2021-05-02 14:59:43,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:43,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:59:43,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:43,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:43,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:43,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384956711] [2021-05-02 14:59:43,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:43,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624941936] [2021-05-02 14:59:43,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624941936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:43,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:43,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:59:43,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827510787] [2021-05-02 14:59:43,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:59:43,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:43,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:59:43,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:59:43,904 INFO L87 Difference]: Start difference. First operand 363 states and 487 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:44,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:44,055 INFO L93 Difference]: Finished difference Result 457 states and 595 transitions. [2021-05-02 14:59:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:59:44,056 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-05-02 14:59:44,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:44,057 INFO L225 Difference]: With dead ends: 457 [2021-05-02 14:59:44,057 INFO L226 Difference]: Without dead ends: 450 [2021-05-02 14:59:44,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:59:44,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-02 14:59:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 430. [2021-05-02 14:59:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 295 states have (on average 1.264406779661017) internal successors, (373), 307 states have internal predecessors, (373), 98 states have call successors, (98), 37 states have call predecessors, (98), 36 states have return successors, (95), 85 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-02 14:59:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 566 transitions. [2021-05-02 14:59:44,092 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 566 transitions. Word has length 64 [2021-05-02 14:59:44,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:44,092 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 566 transitions. [2021-05-02 14:59:44,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 566 transitions. [2021-05-02 14:59:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 14:59:44,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:44,093 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:44,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 14:59:44,293 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:44,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:44,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 1 times [2021-05-02 14:59:44,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:44,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233808209] [2021-05-02 14:59:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:44,299 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:44,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044997412] [2021-05-02 14:59:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:44,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:59:44,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:44,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-02 14:59:44,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:44,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233808209] [2021-05-02 14:59:44,524 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:44,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044997412] [2021-05-02 14:59:44,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044997412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:44,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:44,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:59:44,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516943582] [2021-05-02 14:59:44,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:59:44,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:44,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:59:44,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:59:44,525 INFO L87 Difference]: Start difference. First operand 430 states and 566 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 14:59:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:44,751 INFO L93 Difference]: Finished difference Result 460 states and 605 transitions. [2021-05-02 14:59:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:59:44,765 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-05-02 14:59:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:44,766 INFO L225 Difference]: With dead ends: 460 [2021-05-02 14:59:44,766 INFO L226 Difference]: Without dead ends: 458 [2021-05-02 14:59:44,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:59:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-02 14:59:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 440. [2021-05-02 14:59:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 301 states have (on average 1.2624584717607974) internal successors, (380), 313 states have internal predecessors, (380), 101 states have call successors, (101), 38 states have call predecessors, (101), 37 states have return successors, (98), 88 states have call predecessors, (98), 98 states have call successors, (98) [2021-05-02 14:59:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 579 transitions. [2021-05-02 14:59:44,801 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 579 transitions. Word has length 67 [2021-05-02 14:59:44,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:44,801 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 579 transitions. [2021-05-02 14:59:44,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 14:59:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 579 transitions. [2021-05-02 14:59:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 14:59:44,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:44,802 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:45,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:59:45,002 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:45,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 2 times [2021-05-02 14:59:45,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:45,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903169523] [2021-05-02 14:59:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:45,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:45,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937865682] [2021-05-02 14:59:45,008 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:45,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:45,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:45,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 14:59:45,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:45,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:45,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:45,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903169523] [2021-05-02 14:59:45,167 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:45,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937865682] [2021-05-02 14:59:45,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937865682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:45,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:45,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:59:45,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958530176] [2021-05-02 14:59:45,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:59:45,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:45,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:59:45,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:59:45,168 INFO L87 Difference]: Start difference. First operand 440 states and 579 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:59:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:45,569 INFO L93 Difference]: Finished difference Result 783 states and 1150 transitions. [2021-05-02 14:59:45,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:59:45,570 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-05-02 14:59:45,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:45,574 INFO L225 Difference]: With dead ends: 783 [2021-05-02 14:59:45,574 INFO L226 Difference]: Without dead ends: 776 [2021-05-02 14:59:45,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:59:45,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-05-02 14:59:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 502. [2021-05-02 14:59:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 347 states have (on average 1.2881844380403458) internal successors, (447), 359 states have internal predecessors, (447), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 14:59:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 678 transitions. [2021-05-02 14:59:45,617 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 678 transitions. Word has length 65 [2021-05-02 14:59:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:45,617 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 678 transitions. [2021-05-02 14:59:45,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:59:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 678 transitions. [2021-05-02 14:59:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 14:59:45,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:45,618 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:45,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:45,839 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:45,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:45,840 INFO L82 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 1 times [2021-05-02 14:59:45,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:45,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030392471] [2021-05-02 14:59:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:45,850 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:45,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661309786] [2021-05-02 14:59:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:45,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:59:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:45,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:45,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:46,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:46,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030392471] [2021-05-02 14:59:46,032 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:46,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661309786] [2021-05-02 14:59:46,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661309786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:46,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:46,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:59:46,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138350665] [2021-05-02 14:59:46,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:59:46,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:46,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:59:46,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:59:46,033 INFO L87 Difference]: Start difference. First operand 502 states and 678 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:46,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:46,198 INFO L93 Difference]: Finished difference Result 755 states and 1057 transitions. [2021-05-02 14:59:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:59:46,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-05-02 14:59:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:46,200 INFO L225 Difference]: With dead ends: 755 [2021-05-02 14:59:46,201 INFO L226 Difference]: Without dead ends: 504 [2021-05-02 14:59:46,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:59:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-02 14:59:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 502. [2021-05-02 14:59:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 347 states have (on average 1.2795389048991355) internal successors, (444), 359 states have internal predecessors, (444), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 14:59:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 675 transitions. [2021-05-02 14:59:46,227 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 675 transitions. Word has length 65 [2021-05-02 14:59:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:46,228 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 675 transitions. [2021-05-02 14:59:46,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 675 transitions. [2021-05-02 14:59:46,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:59:46,228 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:46,229 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:46,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 14:59:46,443 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:46,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:46,444 INFO L82 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 1 times [2021-05-02 14:59:46,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:46,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439295352] [2021-05-02 14:59:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:46,448 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:46,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597413791] [2021-05-02 14:59:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:46,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 14:59:46,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:46,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 14:59:46,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:46,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439295352] [2021-05-02 14:59:46,599 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:46,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597413791] [2021-05-02 14:59:46,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597413791] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:46,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:46,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:59:46,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886367467] [2021-05-02 14:59:46,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:59:46,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:46,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:59:46,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:59:46,600 INFO L87 Difference]: Start difference. First operand 502 states and 675 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:59:46,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:46,650 INFO L93 Difference]: Finished difference Result 860 states and 1209 transitions. [2021-05-02 14:59:46,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:59:46,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-05-02 14:59:46,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:46,656 INFO L225 Difference]: With dead ends: 860 [2021-05-02 14:59:46,657 INFO L226 Difference]: Without dead ends: 584 [2021-05-02 14:59:46,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:59:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-02 14:59:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 528. [2021-05-02 14:59:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 373 states have (on average 1.2868632707774799) internal successors, (480), 379 states have internal predecessors, (480), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 14:59:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 711 transitions. [2021-05-02 14:59:46,681 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 711 transitions. Word has length 69 [2021-05-02 14:59:46,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:46,681 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 711 transitions. [2021-05-02 14:59:46,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:59:46,681 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 711 transitions. [2021-05-02 14:59:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:59:46,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:46,682 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:46,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:46,896 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:46,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:46,897 INFO L82 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 2 times [2021-05-02 14:59:46,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:46,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892689652] [2021-05-02 14:59:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:46,903 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:46,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984975159] [2021-05-02 14:59:46,904 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:46,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:46,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:46,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:59:46,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:46,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:46,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:47,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:47,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892689652] [2021-05-02 14:59:47,081 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:47,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984975159] [2021-05-02 14:59:47,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984975159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:47,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:47,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:59:47,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662216660] [2021-05-02 14:59:47,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:59:47,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:47,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:59:47,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:59:47,082 INFO L87 Difference]: Start difference. First operand 528 states and 711 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:47,259 INFO L93 Difference]: Finished difference Result 857 states and 1194 transitions. [2021-05-02 14:59:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:59:47,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-05-02 14:59:47,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:47,263 INFO L225 Difference]: With dead ends: 857 [2021-05-02 14:59:47,263 INFO L226 Difference]: Without dead ends: 551 [2021-05-02 14:59:47,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:59:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-05-02 14:59:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 540. [2021-05-02 14:59:47,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 383 states have (on average 1.279373368146214) internal successors, (490), 386 states have internal predecessors, (490), 118 states have call successors, (118), 39 states have call predecessors, (118), 38 states have return successors, (115), 114 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-02 14:59:47,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 723 transitions. [2021-05-02 14:59:47,298 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 723 transitions. Word has length 69 [2021-05-02 14:59:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:47,300 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 723 transitions. [2021-05-02 14:59:47,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 723 transitions. [2021-05-02 14:59:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 14:59:47,301 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:47,301 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:47,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 14:59:47,509 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:47,509 INFO L82 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 2 times [2021-05-02 14:59:47,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:47,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148226889] [2021-05-02 14:59:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:47,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:47,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465229229] [2021-05-02 14:59:47,514 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:47,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:47,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:47,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:59:47,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:47,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:47,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:47,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148226889] [2021-05-02 14:59:47,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:47,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465229229] [2021-05-02 14:59:47,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465229229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:47,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:47,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:59:47,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890632434] [2021-05-02 14:59:47,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:59:47,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:47,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:59:47,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:59:47,706 INFO L87 Difference]: Start difference. First operand 540 states and 723 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:47,948 INFO L93 Difference]: Finished difference Result 852 states and 1151 transitions. [2021-05-02 14:59:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:59:47,949 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-05-02 14:59:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:47,952 INFO L225 Difference]: With dead ends: 852 [2021-05-02 14:59:47,952 INFO L226 Difference]: Without dead ends: 660 [2021-05-02 14:59:47,953 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:59:47,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-05-02 14:59:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 627. [2021-05-02 14:59:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 441 states have (on average 1.256235827664399) internal successors, (554), 445 states have internal predecessors, (554), 135 states have call successors, (135), 51 states have call predecessors, (135), 50 states have return successors, (131), 130 states have call predecessors, (131), 131 states have call successors, (131) [2021-05-02 14:59:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 820 transitions. [2021-05-02 14:59:47,991 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 820 transitions. Word has length 70 [2021-05-02 14:59:47,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:47,992 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 820 transitions. [2021-05-02 14:59:47,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 820 transitions. [2021-05-02 14:59:47,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 14:59:47,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:47,993 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:48,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 14:59:48,213 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 1 times [2021-05-02 14:59:48,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:48,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145173698] [2021-05-02 14:59:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:48,265 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:48,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73833380] [2021-05-02 14:59:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:48,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 14:59:48,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:48,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:59:48,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:48,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145173698] [2021-05-02 14:59:48,776 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:48,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73833380] [2021-05-02 14:59:48,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73833380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:48,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:48,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:59:48,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950979380] [2021-05-02 14:59:48,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:59:48,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:48,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:59:48,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:59:48,777 INFO L87 Difference]: Start difference. First operand 627 states and 820 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:59:50,196 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 14:59:50,473 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-02 14:59:50,692 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 14:59:51,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:51,401 INFO L93 Difference]: Finished difference Result 800 states and 1079 transitions. [2021-05-02 14:59:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 14:59:51,413 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 70 [2021-05-02 14:59:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:51,417 INFO L225 Difference]: With dead ends: 800 [2021-05-02 14:59:51,417 INFO L226 Difference]: Without dead ends: 798 [2021-05-02 14:59:51,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1692.9ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 14:59:51,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-05-02 14:59:51,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 749. [2021-05-02 14:59:51,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 530 states have (on average 1.288679245283019) internal successors, (683), 534 states have internal predecessors, (683), 167 states have call successors, (167), 52 states have call predecessors, (167), 51 states have return successors, (163), 162 states have call predecessors, (163), 163 states have call successors, (163) [2021-05-02 14:59:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1013 transitions. [2021-05-02 14:59:51,474 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1013 transitions. Word has length 70 [2021-05-02 14:59:51,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:51,475 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1013 transitions. [2021-05-02 14:59:51,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:59:51,475 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1013 transitions. [2021-05-02 14:59:51,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:59:51,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:51,477 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:51,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 14:59:51,681 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:51,681 INFO L82 PathProgramCache]: Analyzing trace with hash -528746969, now seen corresponding path program 1 times [2021-05-02 14:59:51,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:51,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659158245] [2021-05-02 14:59:51,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:51,686 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:51,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689024363] [2021-05-02 14:59:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:51,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 14:59:51,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:51,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-02 14:59:51,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:51,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659158245] [2021-05-02 14:59:51,945 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:51,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689024363] [2021-05-02 14:59:51,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689024363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:51,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:51,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:59:51,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243388838] [2021-05-02 14:59:51,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:59:51,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:51,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:59:51,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:59:51,946 INFO L87 Difference]: Start difference. First operand 749 states and 1013 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:59:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:52,376 INFO L93 Difference]: Finished difference Result 1024 states and 1449 transitions. [2021-05-02 14:59:52,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 14:59:52,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 74 [2021-05-02 14:59:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:52,380 INFO L225 Difference]: With dead ends: 1024 [2021-05-02 14:59:52,380 INFO L226 Difference]: Without dead ends: 1022 [2021-05-02 14:59:52,381 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 197.0ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-05-02 14:59:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-05-02 14:59:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 779. [2021-05-02 14:59:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 545 states have (on average 1.2862385321100918) internal successors, (701), 552 states have internal predecessors, (701), 179 states have call successors, (179), 55 states have call predecessors, (179), 54 states have return successors, (175), 171 states have call predecessors, (175), 175 states have call successors, (175) [2021-05-02 14:59:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1055 transitions. [2021-05-02 14:59:52,420 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1055 transitions. Word has length 74 [2021-05-02 14:59:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:52,422 INFO L480 AbstractCegarLoop]: Abstraction has 779 states and 1055 transitions. [2021-05-02 14:59:52,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:59:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1055 transitions. [2021-05-02 14:59:52,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 14:59:52,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:52,423 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:52,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 14:59:52,637 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:52,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:52,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2070693174, now seen corresponding path program 2 times [2021-05-02 14:59:52,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:52,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497067366] [2021-05-02 14:59:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:52,644 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:52,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763531016] [2021-05-02 14:59:52,644 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:52,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:52,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:52,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:59:52,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:52,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 14:59:52,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:52,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497067366] [2021-05-02 14:59:52,880 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:52,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763531016] [2021-05-02 14:59:52,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763531016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:52,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:52,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:59:52,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887204408] [2021-05-02 14:59:52,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:59:52,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:52,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:59:52,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:59:52,881 INFO L87 Difference]: Start difference. First operand 779 states and 1055 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:59:53,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:53,193 INFO L93 Difference]: Finished difference Result 978 states and 1364 transitions. [2021-05-02 14:59:53,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:59:53,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2021-05-02 14:59:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:53,197 INFO L225 Difference]: With dead ends: 978 [2021-05-02 14:59:53,197 INFO L226 Difference]: Without dead ends: 976 [2021-05-02 14:59:53,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-05-02 14:59:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-05-02 14:59:53,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 897. [2021-05-02 14:59:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 621 states have (on average 1.317230273752013) internal successors, (818), 628 states have internal predecessors, (818), 219 states have call successors, (219), 57 states have call predecessors, (219), 56 states have return successors, (215), 211 states have call predecessors, (215), 215 states have call successors, (215) [2021-05-02 14:59:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1252 transitions. [2021-05-02 14:59:53,243 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1252 transitions. Word has length 73 [2021-05-02 14:59:53,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:53,244 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1252 transitions. [2021-05-02 14:59:53,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:59:53,244 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1252 transitions. [2021-05-02 14:59:53,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 14:59:53,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:53,244 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:53,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:53,459 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:53,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:53,459 INFO L82 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 3 times [2021-05-02 14:59:53,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:53,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918164250] [2021-05-02 14:59:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:53,466 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:53,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899327133] [2021-05-02 14:59:53,467 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:53,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:59:53,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:53,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 14:59:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:53,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 14:59:53,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:53,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918164250] [2021-05-02 14:59:53,933 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:53,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899327133] [2021-05-02 14:59:53,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899327133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:53,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:53,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:59:53,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220429603] [2021-05-02 14:59:53,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 14:59:53,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:53,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 14:59:53,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:59:53,934 INFO L87 Difference]: Start difference. First operand 897 states and 1252 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:59:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:54,707 INFO L93 Difference]: Finished difference Result 979 states and 1364 transitions. [2021-05-02 14:59:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:59:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 75 [2021-05-02 14:59:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:54,709 INFO L225 Difference]: With dead ends: 979 [2021-05-02 14:59:54,710 INFO L226 Difference]: Without dead ends: 977 [2021-05-02 14:59:54,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 466.3ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:59:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-05-02 14:59:54,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 957. [2021-05-02 14:59:54,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 660 states have (on average 1.3212121212121213) internal successors, (872), 668 states have internal predecessors, (872), 236 states have call successors, (236), 61 states have call predecessors, (236), 60 states have return successors, (232), 227 states have call predecessors, (232), 232 states have call successors, (232) [2021-05-02 14:59:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1340 transitions. [2021-05-02 14:59:54,762 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1340 transitions. Word has length 75 [2021-05-02 14:59:54,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:54,762 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 1340 transitions. [2021-05-02 14:59:54,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:59:54,762 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1340 transitions. [2021-05-02 14:59:54,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 14:59:54,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:54,763 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:54,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:54,976 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:54,976 INFO L82 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 3 times [2021-05-02 14:59:54,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:54,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61354820] [2021-05-02 14:59:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:54,982 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:54,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914921313] [2021-05-02 14:59:54,982 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:55,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:59:55,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:55,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:59:55,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:55,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:55,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:55,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61354820] [2021-05-02 14:59:55,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:55,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914921313] [2021-05-02 14:59:55,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914921313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:55,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:55,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:59:55,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409073271] [2021-05-02 14:59:55,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:59:55,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:55,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:59:55,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:59:55,193 INFO L87 Difference]: Start difference. First operand 957 states and 1340 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:55,431 INFO L93 Difference]: Finished difference Result 1736 states and 2484 transitions. [2021-05-02 14:59:55,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:59:55,431 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-05-02 14:59:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:55,434 INFO L225 Difference]: With dead ends: 1736 [2021-05-02 14:59:55,434 INFO L226 Difference]: Without dead ends: 1138 [2021-05-02 14:59:55,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:59:55,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-05-02 14:59:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1108. [2021-05-02 14:59:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 764 states have (on average 1.2905759162303665) internal successors, (986), 773 states have internal predecessors, (986), 268 states have call successors, (268), 76 states have call predecessors, (268), 75 states have return successors, (263), 258 states have call predecessors, (263), 263 states have call successors, (263) [2021-05-02 14:59:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1517 transitions. [2021-05-02 14:59:55,498 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1517 transitions. Word has length 76 [2021-05-02 14:59:55,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:55,498 INFO L480 AbstractCegarLoop]: Abstraction has 1108 states and 1517 transitions. [2021-05-02 14:59:55,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1517 transitions. [2021-05-02 14:59:55,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 14:59:55,498 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:55,499 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:55,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:55,713 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:55,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:55,713 INFO L82 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 1 times [2021-05-02 14:59:55,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:55,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069266158] [2021-05-02 14:59:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:55,718 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:55,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148441678] [2021-05-02 14:59:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:55,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 14:59:55,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:55,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:56,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:56,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 14:59:56,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:56,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069266158] [2021-05-02 14:59:56,125 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:56,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148441678] [2021-05-02 14:59:56,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148441678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:56,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:56,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:59:56,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934802877] [2021-05-02 14:59:56,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:59:56,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:56,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:59:56,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:59:56,127 INFO L87 Difference]: Start difference. First operand 1108 states and 1517 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:56,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:56,784 INFO L93 Difference]: Finished difference Result 1180 states and 1616 transitions. [2021-05-02 14:59:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:59:56,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 81 [2021-05-02 14:59:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:56,788 INFO L225 Difference]: With dead ends: 1180 [2021-05-02 14:59:56,788 INFO L226 Difference]: Without dead ends: 1177 [2021-05-02 14:59:56,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 378.1ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-02 14:59:56,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-05-02 14:59:56,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1162. [2021-05-02 14:59:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 798 states have (on average 1.2907268170426065) internal successors, (1030), 805 states have internal predecessors, (1030), 283 states have call successors, (283), 81 states have call predecessors, (283), 80 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-05-02 14:59:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1592 transitions. [2021-05-02 14:59:56,850 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1592 transitions. Word has length 81 [2021-05-02 14:59:56,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:56,851 INFO L480 AbstractCegarLoop]: Abstraction has 1162 states and 1592 transitions. [2021-05-02 14:59:56,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1592 transitions. [2021-05-02 14:59:56,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:59:56,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:56,852 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:57,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 14:59:57,065 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 1 times [2021-05-02 14:59:57,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:57,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490742402] [2021-05-02 14:59:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:57,069 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:57,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269321607] [2021-05-02 14:59:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:59:57,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:57,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 14:59:57,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:57,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490742402] [2021-05-02 14:59:57,279 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:57,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269321607] [2021-05-02 14:59:57,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269321607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:57,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:57,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:59:57,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074951374] [2021-05-02 14:59:57,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:59:57,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:57,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:59:57,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:59:57,280 INFO L87 Difference]: Start difference. First operand 1162 states and 1592 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:57,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:57,475 INFO L93 Difference]: Finished difference Result 1175 states and 1601 transitions. [2021-05-02 14:59:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:59:57,476 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 14:59:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:57,479 INFO L225 Difference]: With dead ends: 1175 [2021-05-02 14:59:57,479 INFO L226 Difference]: Without dead ends: 1168 [2021-05-02 14:59:57,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:59:57,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-05-02 14:59:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1162. [2021-05-02 14:59:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 798 states have (on average 1.2882205513784462) internal successors, (1028), 805 states have internal predecessors, (1028), 283 states have call successors, (283), 81 states have call predecessors, (283), 80 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-05-02 14:59:57,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1590 transitions. [2021-05-02 14:59:57,539 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1590 transitions. Word has length 87 [2021-05-02 14:59:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:57,540 INFO L480 AbstractCegarLoop]: Abstraction has 1162 states and 1590 transitions. [2021-05-02 14:59:57,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:57,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1590 transitions. [2021-05-02 14:59:57,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 14:59:57,540 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:57,541 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:57,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:57,755 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:57,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:57,756 INFO L82 PathProgramCache]: Analyzing trace with hash -790944287, now seen corresponding path program 2 times [2021-05-02 14:59:57,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:57,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930686261] [2021-05-02 14:59:57,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:57,759 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:57,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117314958] [2021-05-02 14:59:57,760 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:57,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:57,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:57,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:59:57,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:57,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-02 14:59:57,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:57,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930686261] [2021-05-02 14:59:57,995 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:57,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117314958] [2021-05-02 14:59:57,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117314958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:57,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:57,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:59:57,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669574212] [2021-05-02 14:59:57,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:59:57,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:57,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:59:57,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:59:57,996 INFO L87 Difference]: Start difference. First operand 1162 states and 1590 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:59:58,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:58,242 INFO L93 Difference]: Finished difference Result 1203 states and 1644 transitions. [2021-05-02 14:59:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:59:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 90 [2021-05-02 14:59:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:58,245 INFO L225 Difference]: With dead ends: 1203 [2021-05-02 14:59:58,245 INFO L226 Difference]: Without dead ends: 1201 [2021-05-02 14:59:58,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:59:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-05-02 14:59:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1177. [2021-05-02 14:59:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 807 states have (on average 1.2862453531598512) internal successors, (1038), 814 states have internal predecessors, (1038), 287 states have call successors, (287), 83 states have call predecessors, (287), 82 states have return successors, (283), 279 states have call predecessors, (283), 283 states have call successors, (283) [2021-05-02 14:59:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1608 transitions. [2021-05-02 14:59:58,306 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1608 transitions. Word has length 90 [2021-05-02 14:59:58,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:58,307 INFO L480 AbstractCegarLoop]: Abstraction has 1177 states and 1608 transitions. [2021-05-02 14:59:58,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:59:58,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1608 transitions. [2021-05-02 14:59:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 14:59:58,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:58,308 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:58,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 14:59:58,521 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:58,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:58,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 2 times [2021-05-02 14:59:58,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:58,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081152109] [2021-05-02 14:59:58,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:58,525 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:58,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731432774] [2021-05-02 14:59:58,525 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:58,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:58,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:58,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 101 conjunts are in the unsatisfiable core [2021-05-02 14:59:58,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:58,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 51 proven. 42 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-05-02 14:59:59,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:59,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081152109] [2021-05-02 14:59:59,257 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:59,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731432774] [2021-05-02 14:59:59,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731432774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:59,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:59,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 14:59:59,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686666702] [2021-05-02 14:59:59,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 14:59:59,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:59,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 14:59:59,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:59:59,258 INFO L87 Difference]: Start difference. First operand 1177 states and 1608 transitions. Second operand has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 15:00:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:00,349 INFO L93 Difference]: Finished difference Result 1267 states and 1736 transitions. [2021-05-02 15:00:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 15:00:00,349 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 88 [2021-05-02 15:00:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:00,353 INFO L225 Difference]: With dead ends: 1267 [2021-05-02 15:00:00,353 INFO L226 Difference]: Without dead ends: 1264 [2021-05-02 15:00:00,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-02 15:00:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-05-02 15:00:00,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1243. [2021-05-02 15:00:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 845 states have (on average 1.2899408284023668) internal successors, (1090), 853 states have internal predecessors, (1090), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 15:00:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1708 transitions. [2021-05-02 15:00:00,435 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1708 transitions. Word has length 88 [2021-05-02 15:00:00,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:00,436 INFO L480 AbstractCegarLoop]: Abstraction has 1243 states and 1708 transitions. [2021-05-02 15:00:00,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 15:00:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1708 transitions. [2021-05-02 15:00:00,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 15:00:00,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:00,437 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:00,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:00,652 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:00,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 2 times [2021-05-02 15:00:00,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:00,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918904291] [2021-05-02 15:00:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:00,665 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:00,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005125934] [2021-05-02 15:00:00,665 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:00,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:00,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:00:00,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:00,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:00:00,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:00,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918904291] [2021-05-02 15:00:00,882 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:00,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005125934] [2021-05-02 15:00:00,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005125934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:00,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:00,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:00:00,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901058119] [2021-05-02 15:00:00,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:00:00,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:00,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:00:00,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:00,885 INFO L87 Difference]: Start difference. First operand 1243 states and 1708 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:01,101 INFO L93 Difference]: Finished difference Result 1280 states and 1744 transitions. [2021-05-02 15:00:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 15:00:01,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2021-05-02 15:00:01,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:01,106 INFO L225 Difference]: With dead ends: 1280 [2021-05-02 15:00:01,106 INFO L226 Difference]: Without dead ends: 1273 [2021-05-02 15:00:01,106 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-02 15:00:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-05-02 15:00:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1254. [2021-05-02 15:00:01,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 856 states have (on average 1.286214953271028) internal successors, (1101), 864 states have internal predecessors, (1101), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 15:00:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1719 transitions. [2021-05-02 15:00:01,197 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1719 transitions. Word has length 91 [2021-05-02 15:00:01,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:01,197 INFO L480 AbstractCegarLoop]: Abstraction has 1254 states and 1719 transitions. [2021-05-02 15:00:01,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:01,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1719 transitions. [2021-05-02 15:00:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 15:00:01,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:01,198 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:01,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 15:00:01,410 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:01,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:01,410 INFO L82 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 1 times [2021-05-02 15:00:01,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:01,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268349697] [2021-05-02 15:00:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:01,414 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:01,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525895520] [2021-05-02 15:00:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:01,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:00:01,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:01,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:00:01,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:01,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268349697] [2021-05-02 15:00:01,649 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:01,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525895520] [2021-05-02 15:00:01,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525895520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:01,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:01,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:00:01,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609918805] [2021-05-02 15:00:01,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:00:01,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:01,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:00:01,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:01,650 INFO L87 Difference]: Start difference. First operand 1254 states and 1719 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:01,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:01,873 INFO L93 Difference]: Finished difference Result 1568 states and 2190 transitions. [2021-05-02 15:00:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 15:00:01,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2021-05-02 15:00:01,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:01,878 INFO L225 Difference]: With dead ends: 1568 [2021-05-02 15:00:01,879 INFO L226 Difference]: Without dead ends: 1280 [2021-05-02 15:00:01,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-02 15:00:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-05-02 15:00:01,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1274. [2021-05-02 15:00:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 876 states have (on average 1.278538812785388) internal successors, (1120), 884 states have internal predecessors, (1120), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 15:00:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1738 transitions. [2021-05-02 15:00:01,991 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1738 transitions. Word has length 93 [2021-05-02 15:00:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:01,992 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 1738 transitions. [2021-05-02 15:00:01,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1738 transitions. [2021-05-02 15:00:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 15:00:01,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:01,993 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:02,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 15:00:02,209 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:02,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1287129886, now seen corresponding path program 2 times [2021-05-02 15:00:02,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:02,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319914954] [2021-05-02 15:00:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:02,214 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:02,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959879402] [2021-05-02 15:00:02,214 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:02,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:02,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:02,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 15:00:02,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:02,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-05-02 15:00:02,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:02,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319914954] [2021-05-02 15:00:02,473 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959879402] [2021-05-02 15:00:02,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959879402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:02,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:02,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:00:02,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514686884] [2021-05-02 15:00:02,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:00:02,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:02,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:00:02,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:02,475 INFO L87 Difference]: Start difference. First operand 1274 states and 1738 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 15:00:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:03,142 INFO L93 Difference]: Finished difference Result 1571 states and 2215 transitions. [2021-05-02 15:00:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 15:00:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 97 [2021-05-02 15:00:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:03,147 INFO L225 Difference]: With dead ends: 1571 [2021-05-02 15:00:03,147 INFO L226 Difference]: Without dead ends: 1569 [2021-05-02 15:00:03,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 15:00:03,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-05-02 15:00:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1310. [2021-05-02 15:00:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 894 states have (on average 1.2818791946308725) internal successors, (1146), 902 states have internal predecessors, (1146), 327 states have call successors, (327), 89 states have call predecessors, (327), 88 states have return successors, (323), 318 states have call predecessors, (323), 323 states have call successors, (323) [2021-05-02 15:00:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1796 transitions. [2021-05-02 15:00:03,223 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1796 transitions. Word has length 97 [2021-05-02 15:00:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:03,223 INFO L480 AbstractCegarLoop]: Abstraction has 1310 states and 1796 transitions. [2021-05-02 15:00:03,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 15:00:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1796 transitions. [2021-05-02 15:00:03,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 15:00:03,225 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:03,225 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:03,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:03,441 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:03,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:03,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 3 times [2021-05-02 15:00:03,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:03,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222087002] [2021-05-02 15:00:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:03,446 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:03,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713613137] [2021-05-02 15:00:03,447 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:03,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 15:00:03,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:03,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:00:03,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:03,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:00:03,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:03,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222087002] [2021-05-02 15:00:03,701 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:03,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713613137] [2021-05-02 15:00:03,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713613137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:03,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:03,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:00:03,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270895632] [2021-05-02 15:00:03,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:00:03,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:03,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:00:03,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:03,702 INFO L87 Difference]: Start difference. First operand 1310 states and 1796 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:04,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:04,012 INFO L93 Difference]: Finished difference Result 1873 states and 2591 transitions. [2021-05-02 15:00:04,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 15:00:04,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2021-05-02 15:00:04,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:04,017 INFO L225 Difference]: With dead ends: 1873 [2021-05-02 15:00:04,017 INFO L226 Difference]: Without dead ends: 1524 [2021-05-02 15:00:04,018 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:00:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-05-02 15:00:04,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1466. [2021-05-02 15:00:04,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 986 states have (on average 1.268762677484787) internal successors, (1251), 995 states have internal predecessors, (1251), 368 states have call successors, (368), 112 states have call predecessors, (368), 111 states have return successors, (363), 358 states have call predecessors, (363), 363 states have call successors, (363) [2021-05-02 15:00:04,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 1982 transitions. [2021-05-02 15:00:04,096 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 1982 transitions. Word has length 97 [2021-05-02 15:00:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:04,096 INFO L480 AbstractCegarLoop]: Abstraction has 1466 states and 1982 transitions. [2021-05-02 15:00:04,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 1982 transitions. [2021-05-02 15:00:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 15:00:04,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:04,097 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:04,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:04,313 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:04,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:04,313 INFO L82 PathProgramCache]: Analyzing trace with hash 516983514, now seen corresponding path program 4 times [2021-05-02 15:00:04,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:04,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040490178] [2021-05-02 15:00:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:04,318 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:04,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239873815] [2021-05-02 15:00:04,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:04,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:00:04,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:04,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 15:00:04,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:04,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 33 proven. 61 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 15:00:05,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:05,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040490178] [2021-05-02 15:00:05,013 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:05,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239873815] [2021-05-02 15:00:05,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239873815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:05,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:05,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 15:00:05,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223834233] [2021-05-02 15:00:05,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 15:00:05,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:05,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 15:00:05,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:00:05,014 INFO L87 Difference]: Start difference. First operand 1466 states and 1982 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 15:00:05,730 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-02 15:00:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:06,123 INFO L93 Difference]: Finished difference Result 1531 states and 2077 transitions. [2021-05-02 15:00:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 15:00:06,124 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 97 [2021-05-02 15:00:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:06,134 INFO L225 Difference]: With dead ends: 1531 [2021-05-02 15:00:06,134 INFO L226 Difference]: Without dead ends: 1529 [2021-05-02 15:00:06,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 739.1ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-05-02 15:00:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-05-02 15:00:06,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1507. [2021-05-02 15:00:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1010 states have (on average 1.2742574257425743) internal successors, (1287), 1019 states have internal predecessors, (1287), 384 states have call successors, (384), 113 states have call predecessors, (384), 112 states have return successors, (379), 374 states have call predecessors, (379), 379 states have call successors, (379) [2021-05-02 15:00:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2050 transitions. [2021-05-02 15:00:06,217 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2050 transitions. Word has length 97 [2021-05-02 15:00:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:06,217 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 2050 transitions. [2021-05-02 15:00:06,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 15:00:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2050 transitions. [2021-05-02 15:00:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 15:00:06,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:06,226 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:06,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:06,441 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:06,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 3 times [2021-05-02 15:00:06,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:06,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349481599] [2021-05-02 15:00:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:06,445 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:06,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376614706] [2021-05-02 15:00:06,446 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:06,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 15:00:06,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:06,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 15:00:06,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:06,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:00:06,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:06,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349481599] [2021-05-02 15:00:06,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:06,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376614706] [2021-05-02 15:00:06,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376614706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:06,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:06,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:00:06,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298271763] [2021-05-02 15:00:06,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:00:06,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:06,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:00:06,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:00:06,735 INFO L87 Difference]: Start difference. First operand 1507 states and 2050 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:07,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:07,086 INFO L93 Difference]: Finished difference Result 1843 states and 2466 transitions. [2021-05-02 15:00:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 15:00:07,087 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2021-05-02 15:00:07,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:07,092 INFO L225 Difference]: With dead ends: 1843 [2021-05-02 15:00:07,092 INFO L226 Difference]: Without dead ends: 1836 [2021-05-02 15:00:07,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-05-02 15:00:07,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-05-02 15:00:07,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1737. [2021-05-02 15:00:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1161 states have (on average 1.2609819121447028) internal successors, (1464), 1186 states have internal predecessors, (1464), 442 states have call successors, (442), 134 states have call predecessors, (442), 133 states have return successors, (436), 416 states have call predecessors, (436), 436 states have call successors, (436) [2021-05-02 15:00:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2342 transitions. [2021-05-02 15:00:07,226 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2342 transitions. Word has length 98 [2021-05-02 15:00:07,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:07,226 INFO L480 AbstractCegarLoop]: Abstraction has 1737 states and 2342 transitions. [2021-05-02 15:00:07,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:07,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2342 transitions. [2021-05-02 15:00:07,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 15:00:07,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:07,227 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:07,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 15:00:07,433 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:07,433 INFO L82 PathProgramCache]: Analyzing trace with hash 971780744, now seen corresponding path program 1 times [2021-05-02 15:00:07,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:07,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761042970] [2021-05-02 15:00:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:07,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:07,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054594296] [2021-05-02 15:00:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:07,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:00:07,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:07,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 31 proven. 25 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-05-02 15:00:07,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:07,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761042970] [2021-05-02 15:00:07,721 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:07,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054594296] [2021-05-02 15:00:07,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054594296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:07,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:07,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:00:07,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298740620] [2021-05-02 15:00:07,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:00:07,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:07,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:00:07,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:00:07,722 INFO L87 Difference]: Start difference. First operand 1737 states and 2342 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 15:00:08,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:08,276 INFO L93 Difference]: Finished difference Result 2047 states and 2823 transitions. [2021-05-02 15:00:08,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 15:00:08,277 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 101 [2021-05-02 15:00:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:08,282 INFO L225 Difference]: With dead ends: 2047 [2021-05-02 15:00:08,282 INFO L226 Difference]: Without dead ends: 2045 [2021-05-02 15:00:08,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-05-02 15:00:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-05-02 15:00:08,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1881. [2021-05-02 15:00:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1224 states have (on average 1.2679738562091503) internal successors, (1552), 1266 states have internal predecessors, (1552), 518 states have call successors, (518), 139 states have call predecessors, (518), 138 states have return successors, (512), 475 states have call predecessors, (512), 512 states have call successors, (512) [2021-05-02 15:00:08,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2582 transitions. [2021-05-02 15:00:08,395 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2582 transitions. Word has length 101 [2021-05-02 15:00:08,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:08,395 INFO L480 AbstractCegarLoop]: Abstraction has 1881 states and 2582 transitions. [2021-05-02 15:00:08,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 15:00:08,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2582 transitions. [2021-05-02 15:00:08,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 15:00:08,396 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:08,396 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:08,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:08,613 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:08,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1348351390, now seen corresponding path program 1 times [2021-05-02 15:00:08,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:08,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961294805] [2021-05-02 15:00:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:08,617 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:08,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296008817] [2021-05-02 15:00:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:08,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:00:08,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:08,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 103 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:00:08,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:08,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961294805] [2021-05-02 15:00:08,882 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:08,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296008817] [2021-05-02 15:00:08,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296008817] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:08,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:08,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:00:08,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818252047] [2021-05-02 15:00:08,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:00:08,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:08,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:00:08,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:08,883 INFO L87 Difference]: Start difference. First operand 1881 states and 2582 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:09,215 INFO L93 Difference]: Finished difference Result 2680 states and 3826 transitions. [2021-05-02 15:00:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 15:00:09,233 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 99 [2021-05-02 15:00:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:09,262 INFO L225 Difference]: With dead ends: 2680 [2021-05-02 15:00:09,262 INFO L226 Difference]: Without dead ends: 1891 [2021-05-02 15:00:09,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:00:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-05-02 15:00:09,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1877. [2021-05-02 15:00:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1220 states have (on average 1.2532786885245901) internal successors, (1529), 1262 states have internal predecessors, (1529), 518 states have call successors, (518), 139 states have call predecessors, (518), 138 states have return successors, (512), 475 states have call predecessors, (512), 512 states have call successors, (512) [2021-05-02 15:00:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 2559 transitions. [2021-05-02 15:00:09,377 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 2559 transitions. Word has length 99 [2021-05-02 15:00:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:09,377 INFO L480 AbstractCegarLoop]: Abstraction has 1877 states and 2559 transitions. [2021-05-02 15:00:09,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 2559 transitions. [2021-05-02 15:00:09,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 15:00:09,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:09,379 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:09,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:09,593 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:09,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:09,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1350164207, now seen corresponding path program 3 times [2021-05-02 15:00:09,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:09,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706645963] [2021-05-02 15:00:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:09,597 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:09,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767194964] [2021-05-02 15:00:09,597 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:09,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 15:00:09,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:09,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 15:00:09,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:09,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:09,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:10,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:10,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:10,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-05-02 15:00:10,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706645963] [2021-05-02 15:00:10,241 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767194964] [2021-05-02 15:00:10,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767194964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:10,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:10,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:00:10,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141025215] [2021-05-02 15:00:10,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 15:00:10,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:10,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 15:00:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:00:10,242 INFO L87 Difference]: Start difference. First operand 1877 states and 2559 transitions. Second operand has 15 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:13,648 INFO L93 Difference]: Finished difference Result 2071 states and 2857 transitions. [2021-05-02 15:00:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 15:00:13,648 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 104 [2021-05-02 15:00:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:13,649 INFO L225 Difference]: With dead ends: 2071 [2021-05-02 15:00:13,649 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:00:13,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 453.2ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-02 15:00:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:00:13,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:00:13,654 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) [2021-05-02 15:00:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:00:13,654 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2021-05-02 15:00:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:13,654 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:00:13,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 15:00:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:00:13,654 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:00:13,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 15:00:13,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:00:14,730 WARN L205 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 726 DAG size of output: 220 [2021-05-02 15:00:15,112 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 82 [2021-05-02 15:00:15,646 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 715 DAG size of output: 271 [2021-05-02 15:00:15,933 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 82 [2021-05-02 15:00:16,200 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 82 [2021-05-02 15:00:17,069 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 568 DAG size of output: 106 [2021-05-02 15:00:17,610 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 15 [2021-05-02 15:00:18,328 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 11 [2021-05-02 15:00:18,760 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 15 [2021-05-02 15:00:18,779 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-02 15:00:18,780 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-02 15:00:18,780 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-02 15:00:18,780 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:00:18,780 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 15:00:18,780 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:00:18,780 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:00:18,780 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-02 15:00:18,780 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:00:18,780 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:00:18,780 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-02 15:00:18,780 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-02 15:00:18,780 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-02 15:00:18,780 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-02 15:00:18,780 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 75) no Hoare annotation was computed. [2021-05-02 15:00:18,780 INFO L198 CegarLoopUtils]: For program point L52(lines 48 58) no Hoare annotation was computed. [2021-05-02 15:00:18,780 INFO L198 CegarLoopUtils]: For program point L48-1(lines 48 58) no Hoare annotation was computed. [2021-05-02 15:00:18,780 INFO L194 CegarLoopUtils]: At program point L48-3(lines 48 58) the Hoare annotation is: (or (and (<= 1 main_~x~0) (<= 1 main_~y~0) (<= main_~v~0 main_~c~0)) (not (<= |old(~counter~0)| 0))) [2021-05-02 15:00:18,780 INFO L198 CegarLoopUtils]: For program point L48-4(lines 48 58) no Hoare annotation was computed. [2021-05-02 15:00:18,781 INFO L198 CegarLoopUtils]: For program point L73(line 73) no Hoare annotation was computed. [2021-05-02 15:00:18,781 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 15:00:18,781 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (= ~counter~0 |old(~counter~0)|))) [2021-05-02 15:00:18,781 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (or (and (<= 1 main_~x~0) (<= 1 main_~y~0) (<= main_~v~0 main_~c~0)) (not (<= |old(~counter~0)| 0))) [2021-05-02 15:00:18,781 INFO L194 CegarLoopUtils]: At program point L49-1(line 49) the Hoare annotation is: (or (and (<= 1 main_~x~0) (<= 1 main_~y~0) (<= main_~v~0 main_~c~0)) (not (<= |old(~counter~0)| 0))) [2021-05-02 15:00:18,781 INFO L198 CegarLoopUtils]: For program point L41-1(lines 41 61) no Hoare annotation was computed. [2021-05-02 15:00:18,781 INFO L194 CegarLoopUtils]: At program point L41-3(lines 41 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-02 15:00:18,781 INFO L198 CegarLoopUtils]: For program point L41-4(lines 41 61) no Hoare annotation was computed. [2021-05-02 15:00:18,781 INFO L198 CegarLoopUtils]: For program point L25(line 25) no Hoare annotation was computed. [2021-05-02 15:00:18,781 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (or (and (<= 1 main_~x~0) (<= 1 main_~y~0) (<= main_~v~0 main_~c~0)) (not (<= |old(~counter~0)| 0))) [2021-05-02 15:00:18,781 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 75) no Hoare annotation was computed. [2021-05-02 15:00:18,781 INFO L198 CegarLoopUtils]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-05-02 15:00:18,781 INFO L198 CegarLoopUtils]: For program point L34-1(lines 34 72) no Hoare annotation was computed. [2021-05-02 15:00:18,781 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 72) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-02 15:00:18,782 INFO L194 CegarLoopUtils]: At program point L34-4(lines 34 72) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-02 15:00:18,782 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 19 75) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 15:00:18,782 INFO L194 CegarLoopUtils]: At program point L51(line 51) the Hoare annotation is: (or (and (<= 1 main_~x~0) (<= 1 main_~y~0) (<= main_~v~0 main_~c~0)) (not (<= |old(~counter~0)| 0))) [2021-05-02 15:00:18,782 INFO L198 CegarLoopUtils]: For program point L35(lines 35 36) no Hoare annotation was computed. [2021-05-02 15:00:18,782 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-02 15:00:18,782 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-02 15:00:18,782 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-02 15:00:18,782 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-02 15:00:18,782 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-02 15:00:18,782 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-02 15:00:18,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:00:18 BoogieIcfgContainer [2021-05-02 15:00:18,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:00:18,794 INFO L168 Benchmark]: Toolchain (without parser) took 45507.61 ms. Allocated memory was 195.0 MB in the beginning and 608.2 MB in the end (delta: 413.1 MB). Free memory was 158.9 MB in the beginning and 376.4 MB in the end (delta: -217.4 MB). Peak memory consumption was 351.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:18,794 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 195.0 MB. Free memory is still 175.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:00:18,794 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.29 ms. Allocated memory is still 195.0 MB. Free memory was 158.8 MB in the beginning and 148.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:18,794 INFO L168 Benchmark]: Boogie Preprocessor took 55.71 ms. Allocated memory is still 195.0 MB. Free memory was 148.5 MB in the beginning and 176.9 MB in the end (delta: -28.4 MB). Peak memory consumption was 2.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:18,794 INFO L168 Benchmark]: RCFGBuilder took 292.43 ms. Allocated memory is still 195.0 MB. Free memory was 176.9 MB in the beginning and 158.6 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:18,795 INFO L168 Benchmark]: TraceAbstraction took 44997.61 ms. Allocated memory was 195.0 MB in the beginning and 608.2 MB in the end (delta: 413.1 MB). Free memory was 158.1 MB in the beginning and 376.4 MB in the end (delta: -218.3 MB). Peak memory consumption was 351.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:18,796 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 195.0 MB. Free memory is still 175.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 158.29 ms. Allocated memory is still 195.0 MB. Free memory was 158.8 MB in the beginning and 148.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.71 ms. Allocated memory is still 195.0 MB. Free memory was 148.5 MB in the beginning and 176.9 MB in the end (delta: -28.4 MB). Peak memory consumption was 2.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 292.43 ms. Allocated memory is still 195.0 MB. Free memory was 176.9 MB in the beginning and 158.6 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 44997.61 ms. Allocated memory was 195.0 MB in the beginning and 608.2 MB in the end (delta: 413.1 MB). Free memory was 158.1 MB in the beginning and 376.4 MB in the end (delta: -218.3 MB). Peak memory consumption was 351.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 40023.0ms, OverallIterations: 45, TraceHistogramMax: 13, EmptinessCheckTime: 38.5ms, AutomataDifference: 17567.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 4909.0ms, InitialAbstractionConstructionTime: 12.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2783 SDtfs, 4129 SDslu, 13816 SDs, 0 SdLazy, 10551 SolverSat, 2405 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 9043.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3047 GetRequests, 2371 SyntacticMatches, 5 SemanticMatches, 671 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 7578.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1881occurred in iteration=43, InterpolantAutomatonStates: 624, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1787.6ms AutomataMinimizationTime, 45 MinimizatonAttempts, 1825 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 16 LocationsWithAnnotation, 1584 PreInvPairs, 2451 NumberOfFragments, 179 HoareAnnotationTreeSize, 1584 FomulaSimplifications, 29499362 FormulaSimplificationTreeSizeReduction, 3229.9ms HoareSimplificationTime, 16 FomulaSimplificationsInter, 53058 FormulaSimplificationTreeSizeReductionInter, 1622.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 430.8ms SsaConstructionTime, 1202.8ms SatisfiabilityAnalysisTime, 8168.9ms InterpolantComputationTime, 2802 NumberOfCodeBlocks, 2661 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2757 ConstructedInterpolants, 0 QuantifiedInterpolants, 14440 SizeOfPredicates, 279 NumberOfNonLiveVariables, 10359 ConjunctsInSsa, 1093 ConjunctsInUnsatCore, 45 InterpolantComputations, 9 PerfectInterpolantSequences, 2753/3873 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || (1 <= x && 1 <= y) - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: ((1 <= x && 1 <= y) && v <= c) || !(\old(counter) <= 0) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || (1 <= x && 1 <= y) RESULT: Ultimate proved your program to be correct! Received shutdown request...