/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/mannadiv_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:12:13,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:12:13,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:12:13,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:12:13,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:12:13,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:12:13,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:12:13,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:12:13,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:12:13,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:12:13,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:12:13,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:12:13,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:12:13,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:12:13,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:12:13,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:12:13,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:12:13,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:12:13,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:12:13,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:12:13,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 04:12:13,514 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:12:13,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:12:13,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:12:13,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:12:13,517 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:12:13,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:12:13,517 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:12:13,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:12:13,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:12:13,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:12:13,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:12:13,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:12:13,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:12:13,519 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:12:13,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:12:13,519 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:12:13,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:12:13,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:12:13,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:12:13,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:12:13,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:12:13,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:12:13,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:12:13,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:12:13,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:12:13,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:12:13,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:12:13,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:12:13,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:12:13,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:12:13,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:12:13,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:12:13,862 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:12:13,862 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:12:13,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-05-06 04:12:13,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522eb3518/1e4987b9292448aeb5a7c2e9c20cb4cd/FLAGe822a1dc6 [2021-05-06 04:12:14,371 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:12:14,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-05-06 04:12:14,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522eb3518/1e4987b9292448aeb5a7c2e9c20cb4cd/FLAGe822a1dc6 [2021-05-06 04:12:14,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522eb3518/1e4987b9292448aeb5a7c2e9c20cb4cd [2021-05-06 04:12:14,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:12:14,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:12:14,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:12:14,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:12:14,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:12:14,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:12:14" (1/1) ... [2021-05-06 04:12:14,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@102fcba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:14, skipping insertion in model container [2021-05-06 04:12:14,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:12:14" (1/1) ... [2021-05-06 04:12:14,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:12:14,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:12:14,891 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/mannadiv_unwindbound20.c[573,586] [2021-05-06 04:12:14,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:12:14,908 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:12:14,947 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/mannadiv_unwindbound20.c[573,586] [2021-05-06 04:12:14,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:12:14,965 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:12:14,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:14 WrapperNode [2021-05-06 04:12:14,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:12:14,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:12:14,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:12:14,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:12:14,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:14" (1/1) ... [2021-05-06 04:12:14,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:14" (1/1) ... [2021-05-06 04:12:14,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:14" (1/1) ... [2021-05-06 04:12:14,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:14" (1/1) ... [2021-05-06 04:12:14,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:14" (1/1) ... [2021-05-06 04:12:14,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:14" (1/1) ... [2021-05-06 04:12:14,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:14" (1/1) ... [2021-05-06 04:12:14,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:12:14,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:12:14,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:12:14,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:12:14,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:12:15,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:12:15,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:12:15,039 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:12:15,040 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:12:15,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:12:15,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:12:15,040 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:12:15,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:12:15,041 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:12:15,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:12:15,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 04:12:15,042 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:12:15,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:12:15,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:12:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:12:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:12:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:12:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:12:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:12:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:12:15,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:12:15,223 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:12:15,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:12:15 BoogieIcfgContainer [2021-05-06 04:12:15,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:12:15,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:12:15,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:12:15,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:12:15,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:12:14" (1/3) ... [2021-05-06 04:12:15,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a5eaf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:12:15, skipping insertion in model container [2021-05-06 04:12:15,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:14" (2/3) ... [2021-05-06 04:12:15,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a5eaf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:12:15, skipping insertion in model container [2021-05-06 04:12:15,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:12:15" (3/3) ... [2021-05-06 04:12:15,230 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2021-05-06 04:12:15,235 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:12:15,238 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:12:15,252 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:12:15,270 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:12:15,270 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:12:15,270 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:12:15,270 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:12:15,270 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:12:15,270 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:12:15,270 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:12:15,270 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:12:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:12:15,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 04:12:15,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:15,287 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:15,287 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:15,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-06 04:12:15,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:15,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167346340] [2021-05-06 04:12:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:15,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:12:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:15,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:12:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:15,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 04:12:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:15,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:15,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167346340] [2021-05-06 04:12:15,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167346340] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:12:15,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:12:15,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:12:15,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092896894] [2021-05-06 04:12:15,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:12:15,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:15,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:12:15,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:12:15,551 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:12:15,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:15,627 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-05-06 04:12:15,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:12:15,629 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 [2021-05-06 04:12:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:15,635 INFO L225 Difference]: With dead ends: 54 [2021-05-06 04:12:15,635 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 04:12:15,637 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:12:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 04:12:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 04:12:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:12:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 04:12:15,669 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-06 04:12:15,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:15,670 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 04:12:15,670 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) [2021-05-06 04:12:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 04:12:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 04:12:15,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:15,671 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:15,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:12:15,672 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:15,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-06 04:12:15,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:15,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024979712] [2021-05-06 04:12:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:15,693 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:15,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767896450] [2021-05-06 04:12:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:15,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:12:15,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:15,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:15,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:15,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:15,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:15,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:15,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:15,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024979712] [2021-05-06 04:12:15,951 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:15,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767896450] [2021-05-06 04:12:15,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767896450] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:12:15,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:12:15,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:12:15,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815008103] [2021-05-06 04:12:15,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:12:15,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:15,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:12:15,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:12:15,957 INFO L87 Difference]: Start difference. First operand 25 states and 29 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) [2021-05-06 04:12:15,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:15,977 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-06 04:12:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:12:15,978 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 [2021-05-06 04:12:15,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:15,980 INFO L225 Difference]: With dead ends: 34 [2021-05-06 04:12:15,980 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 04:12:15,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:12:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 04:12:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 04:12:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:12:15,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 04:12:15,999 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-06 04:12:16,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:16,000 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 04:12:16,000 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) [2021-05-06 04:12:16,000 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 04:12:16,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 04:12:16,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:16,001 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:16,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:12:16,222 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:16,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:16,223 INFO L82 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2021-05-06 04:12:16,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:16,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129282690] [2021-05-06 04:12:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:16,245 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:16,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800835245] [2021-05-06 04:12:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 04:12:16,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:16,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:16,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:16,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 04:12:16,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:16,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129282690] [2021-05-06 04:12:16,481 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:16,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800835245] [2021-05-06 04:12:16,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800835245] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:12:16,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:12:16,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 04:12:16,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103865225] [2021-05-06 04:12:16,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:12:16,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:16,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:12:16,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:12:16,485 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-05-06 04:12:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:16,574 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-06 04:12:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:12:16,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 23 [2021-05-06 04:12:16,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:16,576 INFO L225 Difference]: With dead ends: 37 [2021-05-06 04:12:16,577 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 04:12:16,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:12:16,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 04:12:16,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-06 04:12:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:12:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-06 04:12:16,590 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-06 04:12:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:16,590 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-06 04:12:16,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-05-06 04:12:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-06 04:12:16,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 04:12:16,591 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:16,592 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] [2021-05-06 04:12:16,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:16,815 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:16,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2021-05-06 04:12:16,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:16,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591315365] [2021-05-06 04:12:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:16,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:16,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637895059] [2021-05-06 04:12:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:16,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 04:12:16,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:16,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:16,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:16,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:16,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:16,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591315365] [2021-05-06 04:12:16,997 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:16,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637895059] [2021-05-06 04:12:16,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637895059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:16,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:16,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:12:16,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892680311] [2021-05-06 04:12:16,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:12:16,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:16,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:12:16,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:12:16,999 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:12:17,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:17,071 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-06 04:12:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:12:17,072 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 04:12:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:17,075 INFO L225 Difference]: With dead ends: 39 [2021-05-06 04:12:17,075 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 04:12:17,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:12:17,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 04:12:17,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-05-06 04:12:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:12:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-06 04:12:17,091 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-06 04:12:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:17,091 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-06 04:12:17,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:12:17,092 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-06 04:12:17,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 04:12:17,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:17,093 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] [2021-05-06 04:12:17,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:17,317 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:17,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2021-05-06 04:12:17,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:17,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653465822] [2021-05-06 04:12:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:17,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:17,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972090138] [2021-05-06 04:12:17,329 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 [2021-05-06 04:12:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:17,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:12:17,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:17,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:17,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:17,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653465822] [2021-05-06 04:12:17,477 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:17,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972090138] [2021-05-06 04:12:17,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972090138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:17,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:17,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 04:12:17,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427533679] [2021-05-06 04:12:17,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:12:17,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:17,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:12:17,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:12:17,485 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:12:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:17,520 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-05-06 04:12:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:12:17,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-06 04:12:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:17,523 INFO L225 Difference]: With dead ends: 43 [2021-05-06 04:12:17,523 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 04:12:17,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:12:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 04:12:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 04:12:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:12:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 04:12:17,537 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-06 04:12:17,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:17,537 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 04:12:17,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:12:17,538 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 04:12:17,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 04:12:17,539 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:17,539 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 04:12:17,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:17,749 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:17,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:17,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 2 times [2021-05-06 04:12:17,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:17,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79444301] [2021-05-06 04:12:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:17,766 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:17,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637518022] [2021-05-06 04:12:17,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:17,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:12:17,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:17,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 04:12:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:17,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:17,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:17,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79444301] [2021-05-06 04:12:17,967 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:17,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637518022] [2021-05-06 04:12:17,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637518022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:17,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:17,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:12:17,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014585008] [2021-05-06 04:12:17,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:12:17,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:17,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:12:17,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:12:17,969 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 04:12:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:18,025 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-06 04:12:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:12:18,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 04:12:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:18,026 INFO L225 Difference]: With dead ends: 52 [2021-05-06 04:12:18,026 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 04:12:18,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:12:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 04:12:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 04:12:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:12:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-06 04:12:18,034 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-06 04:12:18,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:18,035 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-06 04:12:18,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 04:12:18,035 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-06 04:12:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 04:12:18,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:18,035 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:18,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 04:12:18,236 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:18,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:18,236 INFO L82 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 3 times [2021-05-06 04:12:18,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:18,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59075671] [2021-05-06 04:12:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:18,246 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:18,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830816595] [2021-05-06 04:12:18,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:18,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:12:18,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:18,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:12:18,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:18,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:18,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:18,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59075671] [2021-05-06 04:12:18,436 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:18,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830816595] [2021-05-06 04:12:18,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830816595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:18,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:18,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:12:18,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074957595] [2021-05-06 04:12:18,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:12:18,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:18,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:12:18,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:12:18,437 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 04:12:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:18,502 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-05-06 04:12:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:12:18,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-06 04:12:18,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:18,504 INFO L225 Difference]: With dead ends: 61 [2021-05-06 04:12:18,504 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 04:12:18,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:12:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 04:12:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 04:12:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:12:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-06 04:12:18,511 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-06 04:12:18,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:18,511 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-06 04:12:18,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 04:12:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-06 04:12:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 04:12:18,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:18,513 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:18,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:18,721 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:18,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:18,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 4 times [2021-05-06 04:12:18,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:18,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590758291] [2021-05-06 04:12:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:18,728 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:18,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791322348] [2021-05-06 04:12:18,729 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:18,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:12:18,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:18,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 04:12:18,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:18,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:18,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:18,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590758291] [2021-05-06 04:12:18,915 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:18,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791322348] [2021-05-06 04:12:18,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791322348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:18,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:18,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:12:18,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933111143] [2021-05-06 04:12:18,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:12:18,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:18,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:12:18,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:12:18,917 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 04:12:19,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:19,007 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-05-06 04:12:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 04:12:19,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-06 04:12:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:19,012 INFO L225 Difference]: With dead ends: 70 [2021-05-06 04:12:19,012 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 04:12:19,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:12:19,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 04:12:19,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 04:12:19,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:12:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-06 04:12:19,020 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-06 04:12:19,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:19,020 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-06 04:12:19,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 04:12:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-06 04:12:19,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 04:12:19,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:19,021 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:19,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:19,245 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:19,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 5 times [2021-05-06 04:12:19,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:19,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602785638] [2021-05-06 04:12:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:19,255 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:19,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934333242] [2021-05-06 04:12:19,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:19,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:12:19,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:19,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 04:12:19,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:19,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:19,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:19,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602785638] [2021-05-06 04:12:19,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:19,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934333242] [2021-05-06 04:12:19,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934333242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:19,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:19,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:12:19,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743940961] [2021-05-06 04:12:19,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:12:19,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:19,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:12:19,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:12:19,494 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 04:12:19,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:19,585 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-05-06 04:12:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 04:12:19,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2021-05-06 04:12:19,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:19,587 INFO L225 Difference]: With dead ends: 79 [2021-05-06 04:12:19,587 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 04:12:19,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:12:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 04:12:19,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 04:12:19,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:12:19,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-05-06 04:12:19,598 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2021-05-06 04:12:19,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:19,598 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-05-06 04:12:19,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 04:12:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-05-06 04:12:19,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 04:12:19,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:19,599 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:19,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 04:12:19,824 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:19,824 INFO L82 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 6 times [2021-05-06 04:12:19,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:19,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018919590] [2021-05-06 04:12:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:19,836 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:19,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783629908] [2021-05-06 04:12:19,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:19,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 04:12:19,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:19,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 04:12:19,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:19,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:19,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:20,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:20,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018919590] [2021-05-06 04:12:20,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:20,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783629908] [2021-05-06 04:12:20,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783629908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:20,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:20,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:12:20,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691647720] [2021-05-06 04:12:20,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:12:20,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:20,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:12:20,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:12:20,118 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 04:12:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:20,225 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-05-06 04:12:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 04:12:20,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2021-05-06 04:12:20,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:20,226 INFO L225 Difference]: With dead ends: 88 [2021-05-06 04:12:20,226 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 04:12:20,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:12:20,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 04:12:20,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-06 04:12:20,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:12:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-06 04:12:20,238 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2021-05-06 04:12:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:20,239 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-06 04:12:20,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 04:12:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-06 04:12:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 04:12:20,246 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:20,246 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:20,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:20,461 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:20,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:20,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 7 times [2021-05-06 04:12:20,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:20,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431226722] [2021-05-06 04:12:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:20,470 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:20,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136199564] [2021-05-06 04:12:20,470 INFO L93 rtionOrderModulation]: Changing assertion order to 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 [2021-05-06 04:12:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:20,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 04:12:20,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:20,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:20,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:20,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431226722] [2021-05-06 04:12:20,724 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:20,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136199564] [2021-05-06 04:12:20,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136199564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:20,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:20,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:12:20,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411404752] [2021-05-06 04:12:20,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:12:20,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:20,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:12:20,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:12:20,725 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 04:12:20,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:20,865 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2021-05-06 04:12:20,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 04:12:20,865 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2021-05-06 04:12:20,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:20,867 INFO L225 Difference]: With dead ends: 97 [2021-05-06 04:12:20,867 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 04:12:20,867 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:12:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 04:12:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-06 04:12:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:12:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-06 04:12:20,887 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2021-05-06 04:12:20,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:20,888 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-06 04:12:20,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 04:12:20,888 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-06 04:12:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 04:12:20,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:20,889 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:21,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:21,090 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:21,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:21,090 INFO L82 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 8 times [2021-05-06 04:12:21,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:21,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598380796] [2021-05-06 04:12:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:21,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:21,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694835146] [2021-05-06 04:12:21,099 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 [2021-05-06 04:12:21,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:12:21,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:21,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 04:12:21,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:21,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:21,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:21,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598380796] [2021-05-06 04:12:21,405 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:21,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694835146] [2021-05-06 04:12:21,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694835146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:21,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:21,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 04:12:21,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758527893] [2021-05-06 04:12:21,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 04:12:21,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:21,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 04:12:21,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:12:21,407 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 04:12:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:21,526 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2021-05-06 04:12:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 04:12:21,527 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2021-05-06 04:12:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:21,528 INFO L225 Difference]: With dead ends: 106 [2021-05-06 04:12:21,528 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 04:12:21,528 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:12:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 04:12:21,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 04:12:21,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:12:21,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-06 04:12:21,536 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2021-05-06 04:12:21,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:21,536 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-06 04:12:21,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 04:12:21,536 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-06 04:12:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 04:12:21,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:21,537 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:21,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 04:12:21,761 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:21,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 9 times [2021-05-06 04:12:21,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:21,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198858393] [2021-05-06 04:12:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:21,768 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:21,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819073490] [2021-05-06 04:12:21,768 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 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 [2021-05-06 04:12:21,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 04:12:21,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:21,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 04:12:21,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:21,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:21,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:22,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:22,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198858393] [2021-05-06 04:12:22,121 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:22,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819073490] [2021-05-06 04:12:22,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819073490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:22,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:22,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 04:12:22,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991419769] [2021-05-06 04:12:22,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 04:12:22,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:22,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 04:12:22,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:12:22,122 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 04:12:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:22,284 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2021-05-06 04:12:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 04:12:22,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2021-05-06 04:12:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:22,286 INFO L225 Difference]: With dead ends: 115 [2021-05-06 04:12:22,286 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 04:12:22,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:12:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 04:12:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-06 04:12:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:12:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-05-06 04:12:22,293 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2021-05-06 04:12:22,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:22,293 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-05-06 04:12:22,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 04:12:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-05-06 04:12:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 04:12:22,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:22,294 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:22,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 04:12:22,517 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 10 times [2021-05-06 04:12:22,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:22,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521455297] [2021-05-06 04:12:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:22,527 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:22,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42179356] [2021-05-06 04:12:22,527 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 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 [2021-05-06 04:12:22,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:12:22,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:22,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 04:12:22,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:22,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:22,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:22,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521455297] [2021-05-06 04:12:22,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:22,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42179356] [2021-05-06 04:12:22,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42179356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:22,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:22,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 04:12:22,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929524523] [2021-05-06 04:12:22,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 04:12:22,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:22,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 04:12:22,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:12:22,859 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 04:12:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:23,008 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2021-05-06 04:12:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 04:12:23,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2021-05-06 04:12:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:23,010 INFO L225 Difference]: With dead ends: 124 [2021-05-06 04:12:23,010 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 04:12:23,011 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-06 04:12:23,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 04:12:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-06 04:12:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:12:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2021-05-06 04:12:23,018 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2021-05-06 04:12:23,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:23,019 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2021-05-06 04:12:23,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 04:12:23,019 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2021-05-06 04:12:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 04:12:23,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:23,020 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:23,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 04:12:23,233 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:23,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 11 times [2021-05-06 04:12:23,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:23,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28243741] [2021-05-06 04:12:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:23,240 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:23,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170867244] [2021-05-06 04:12:23,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 04:12:23,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 04:12:23,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:23,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 04:12:23,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:23,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:23,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:23,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28243741] [2021-05-06 04:12:23,614 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:23,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170867244] [2021-05-06 04:12:23,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170867244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:23,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:23,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 04:12:23,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436695042] [2021-05-06 04:12:23,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 04:12:23,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:23,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 04:12:23,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:12:23,615 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 04:12:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:23,810 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-05-06 04:12:23,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 04:12:23,811 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2021-05-06 04:12:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:23,812 INFO L225 Difference]: With dead ends: 133 [2021-05-06 04:12:23,812 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 04:12:23,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-06 04:12:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 04:12:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-05-06 04:12:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:12:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2021-05-06 04:12:23,819 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2021-05-06 04:12:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:23,820 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2021-05-06 04:12:23,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 04:12:23,820 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2021-05-06 04:12:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-06 04:12:23,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:23,821 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:24,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:24,045 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:24,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:24,045 INFO L82 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 12 times [2021-05-06 04:12:24,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:24,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530833550] [2021-05-06 04:12:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:24,052 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:24,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974812352] [2021-05-06 04:12:24,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 04:12:24,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 04:12:24,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:24,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 04:12:24,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:24,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:24,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:24,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530833550] [2021-05-06 04:12:24,423 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:24,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974812352] [2021-05-06 04:12:24,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974812352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:24,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:24,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 04:12:24,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791440489] [2021-05-06 04:12:24,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 04:12:24,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:24,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 04:12:24,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:12:24,425 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 04:12:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:24,632 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2021-05-06 04:12:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 04:12:24,632 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2021-05-06 04:12:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:24,633 INFO L225 Difference]: With dead ends: 142 [2021-05-06 04:12:24,633 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 04:12:24,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-06 04:12:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 04:12:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 04:12:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:12:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-05-06 04:12:24,641 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2021-05-06 04:12:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:24,641 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-05-06 04:12:24,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 04:12:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-05-06 04:12:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 04:12:24,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:24,643 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:24,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 04:12:24,865 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:24,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:24,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 13 times [2021-05-06 04:12:24,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:24,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407810491] [2021-05-06 04:12:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:24,872 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:24,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029869608] [2021-05-06 04:12:24,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-05-06 04:12:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:24,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 04:12:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:24,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:24,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:25,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:25,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407810491] [2021-05-06 04:12:25,260 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:25,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029869608] [2021-05-06 04:12:25,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029869608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:25,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:25,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 04:12:25,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835906840] [2021-05-06 04:12:25,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 04:12:25,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:25,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 04:12:25,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:12:25,262 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 04:12:25,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:25,497 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2021-05-06 04:12:25,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 04:12:25,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2021-05-06 04:12:25,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:25,499 INFO L225 Difference]: With dead ends: 151 [2021-05-06 04:12:25,499 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 04:12:25,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-06 04:12:25,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 04:12:25,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-06 04:12:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:12:25,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2021-05-06 04:12:25,507 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2021-05-06 04:12:25,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:25,507 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2021-05-06 04:12:25,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 04:12:25,507 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2021-05-06 04:12:25,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 04:12:25,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:25,508 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:25,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 04:12:25,731 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:25,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:25,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 14 times [2021-05-06 04:12:25,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:25,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302525276] [2021-05-06 04:12:25,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:25,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:25,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606342712] [2021-05-06 04:12:25,739 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 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 [2021-05-06 04:12:25,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:12:25,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:25,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 04:12:25,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:25,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:25,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:26,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:26,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302525276] [2021-05-06 04:12:26,139 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:26,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606342712] [2021-05-06 04:12:26,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606342712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:26,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:26,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 04:12:26,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082698277] [2021-05-06 04:12:26,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 04:12:26,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:26,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 04:12:26,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:12:26,141 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 04:12:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:26,388 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2021-05-06 04:12:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 04:12:26,388 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2021-05-06 04:12:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:26,389 INFO L225 Difference]: With dead ends: 160 [2021-05-06 04:12:26,389 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 04:12:26,390 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-06 04:12:26,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 04:12:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-06 04:12:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 04:12:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2021-05-06 04:12:26,397 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2021-05-06 04:12:26,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:26,398 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2021-05-06 04:12:26,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 04:12:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2021-05-06 04:12:26,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-06 04:12:26,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:26,399 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:26,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 04:12:26,600 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:26,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 15 times [2021-05-06 04:12:26,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:26,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439117463] [2021-05-06 04:12:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:26,607 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:26,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467174542] [2021-05-06 04:12:26,607 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 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 [2021-05-06 04:12:26,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 04:12:26,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:26,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 04:12:26,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:26,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:26,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:27,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:27,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439117463] [2021-05-06 04:12:27,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:27,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467174542] [2021-05-06 04:12:27,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467174542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:27,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:27,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 04:12:27,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025520841] [2021-05-06 04:12:27,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 04:12:27,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:27,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 04:12:27,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:12:27,046 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 04:12:27,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:27,331 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2021-05-06 04:12:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 04:12:27,332 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2021-05-06 04:12:27,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:27,333 INFO L225 Difference]: With dead ends: 169 [2021-05-06 04:12:27,333 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 04:12:27,334 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 290.2ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 04:12:27,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 04:12:27,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-06 04:12:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 04:12:27,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2021-05-06 04:12:27,342 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2021-05-06 04:12:27,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:27,342 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2021-05-06 04:12:27,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 04:12:27,343 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2021-05-06 04:12:27,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-06 04:12:27,344 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:27,344 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:27,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:27,568 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:27,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 16 times [2021-05-06 04:12:27,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:27,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747964730] [2021-05-06 04:12:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:27,574 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:27,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441808464] [2021-05-06 04:12:27,574 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 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 [2021-05-06 04:12:27,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:12:27,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 04:12:27,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:27,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:27,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:28,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:28,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747964730] [2021-05-06 04:12:28,042 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:28,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441808464] [2021-05-06 04:12:28,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441808464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:28,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:28,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 04:12:28,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650733991] [2021-05-06 04:12:28,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 04:12:28,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:28,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 04:12:28,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:12:28,044 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 04:12:28,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:28,292 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2021-05-06 04:12:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 04:12:28,292 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2021-05-06 04:12:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:28,293 INFO L225 Difference]: With dead ends: 178 [2021-05-06 04:12:28,293 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 04:12:28,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 04:12:28,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 04:12:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 04:12:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 04:12:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2021-05-06 04:12:28,302 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2021-05-06 04:12:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:28,302 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2021-05-06 04:12:28,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 04:12:28,303 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2021-05-06 04:12:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-06 04:12:28,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:28,304 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:28,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:28,531 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:28,531 INFO L82 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 17 times [2021-05-06 04:12:28,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:28,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365597403] [2021-05-06 04:12:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:28,538 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:28,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296159820] [2021-05-06 04:12:28,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 04:12:28,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-06 04:12:28,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:28,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 04:12:28,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:28,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:28,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:29,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:29,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365597403] [2021-05-06 04:12:29,052 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:29,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296159820] [2021-05-06 04:12:29,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296159820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:29,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:29,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-06 04:12:29,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105113812] [2021-05-06 04:12:29,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 04:12:29,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:29,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 04:12:29,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-06 04:12:29,054 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 04:12:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:29,329 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2021-05-06 04:12:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 04:12:29,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2021-05-06 04:12:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:29,330 INFO L225 Difference]: With dead ends: 187 [2021-05-06 04:12:29,330 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 04:12:29,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 04:12:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 04:12:29,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-06 04:12:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 04:12:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2021-05-06 04:12:29,341 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2021-05-06 04:12:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:29,341 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2021-05-06 04:12:29,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 04:12:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2021-05-06 04:12:29,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-06 04:12:29,343 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:29,343 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:29,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 04:12:29,567 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:29,567 INFO L82 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 18 times [2021-05-06 04:12:29,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:29,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160041528] [2021-05-06 04:12:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:29,572 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:29,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083794882] [2021-05-06 04:12:29,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 04:12:29,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-06 04:12:29,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:29,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 04:12:29,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:29,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:29,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:30,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:30,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160041528] [2021-05-06 04:12:30,122 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:30,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083794882] [2021-05-06 04:12:30,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083794882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:30,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:30,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 04:12:30,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013898892] [2021-05-06 04:12:30,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 04:12:30,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:30,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 04:12:30,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:12:30,125 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 04:12:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:30,440 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2021-05-06 04:12:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 04:12:30,442 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2021-05-06 04:12:30,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:30,443 INFO L225 Difference]: With dead ends: 196 [2021-05-06 04:12:30,443 INFO L226 Difference]: Without dead ends: 191 [2021-05-06 04:12:30,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 04:12:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-06 04:12:30,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-05-06 04:12:30,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 04:12:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2021-05-06 04:12:30,453 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2021-05-06 04:12:30,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:30,453 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2021-05-06 04:12:30,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 04:12:30,454 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2021-05-06 04:12:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-06 04:12:30,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:30,455 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:30,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 04:12:30,669 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:30,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 19 times [2021-05-06 04:12:30,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:30,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521923403] [2021-05-06 04:12:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:30,677 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:30,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969036758] [2021-05-06 04:12:30,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-05-06 04:12:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:30,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 04:12:30,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:30,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:30,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:31,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:31,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521923403] [2021-05-06 04:12:31,212 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:31,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969036758] [2021-05-06 04:12:31,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969036758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:31,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:31,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 04:12:31,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135927878] [2021-05-06 04:12:31,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 04:12:31,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:31,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 04:12:31,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-06 04:12:31,214 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 04:12:31,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:31,526 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2021-05-06 04:12:31,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 04:12:31,526 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2021-05-06 04:12:31,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:31,529 INFO L225 Difference]: With dead ends: 205 [2021-05-06 04:12:31,529 INFO L226 Difference]: Without dead ends: 200 [2021-05-06 04:12:31,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 04:12:31,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-06 04:12:31,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-05-06 04:12:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 04:12:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2021-05-06 04:12:31,542 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2021-05-06 04:12:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:31,542 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2021-05-06 04:12:31,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 04:12:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2021-05-06 04:12:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-05-06 04:12:31,543 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:31,544 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:31,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:31,761 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:31,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 20 times [2021-05-06 04:12:31,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:31,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172180340] [2021-05-06 04:12:31,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:31,766 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:31,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647621243] [2021-05-06 04:12:31,767 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 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 [2021-05-06 04:12:31,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:12:31,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 04:12:31,867 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:12:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 04:12:31,909 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:12:32,143 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 04:12:32,143 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 04:12:32,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 04:12:32,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 04:12:32 BoogieIcfgContainer [2021-05-06 04:12:32,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 04:12:32,467 INFO L168 Benchmark]: Toolchain (without parser) took 17700.09 ms. Allocated memory was 181.4 MB in the beginning and 342.9 MB in the end (delta: 161.5 MB). Free memory was 145.1 MB in the beginning and 271.4 MB in the end (delta: -126.3 MB). Peak memory consumption was 36.3 MB. Max. memory is 8.0 GB. [2021-05-06 04:12:32,467 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 181.4 MB. Free memory is still 162.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:12:32,467 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.37 ms. Allocated memory is still 181.4 MB. Free memory was 144.9 MB in the beginning and 163.4 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-05-06 04:12:32,467 INFO L168 Benchmark]: Boogie Preprocessor took 20.02 ms. Allocated memory is still 181.4 MB. Free memory was 163.4 MB in the beginning and 162.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 04:12:32,467 INFO L168 Benchmark]: RCFGBuilder took 238.06 ms. Allocated memory is still 181.4 MB. Free memory was 161.8 MB in the beginning and 147.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 04:12:32,467 INFO L168 Benchmark]: TraceAbstraction took 17240.28 ms. Allocated memory was 181.4 MB in the beginning and 342.9 MB in the end (delta: 161.5 MB). Free memory was 146.6 MB in the beginning and 271.4 MB in the end (delta: -124.8 MB). Peak memory consumption was 38.3 MB. Max. memory is 8.0 GB. [2021-05-06 04:12:32,467 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 181.4 MB. Free memory is still 162.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 195.37 ms. Allocated memory is still 181.4 MB. Free memory was 144.9 MB in the beginning and 163.4 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.02 ms. Allocated memory is still 181.4 MB. Free memory was 163.4 MB in the beginning and 162.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 238.06 ms. Allocated memory is still 181.4 MB. Free memory was 161.8 MB in the beginning and 147.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17240.28 ms. Allocated memory was 181.4 MB in the beginning and 342.9 MB in the end (delta: 161.5 MB). Free memory was 146.6 MB in the beginning and 271.4 MB in the end (delta: -124.8 MB). Peak memory consumption was 38.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=25, counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L29] RET assume_abort_if_not(x1 >= 0) VAL [\old(counter)=0, counter=0, x1=21, x2=1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L30] RET assume_abort_if_not(x2 != 0) VAL [\old(counter)=0, counter=0, x1=21, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [\old(counter)=0, counter=0, x1=21, x2=1, y1=0, y2=0, y3=21] [L36] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, x1=21, x2=1, y1=0, y2=0, y3=21] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=1, x1=21, x2=1, y1=0, y2=0, y3=21] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=1, x1=21, x2=1, y1=0, y2=0, y3=21] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=1, x1=21, x2=1, y1=1, y2=0, y3=20] [L36] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, x1=21, x2=1, y1=1, y2=0, y3=20] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=2, x1=21, x2=1, y1=1, y2=0, y3=20] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=2, x1=21, x2=1, y1=1, y2=0, y3=20] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=2, x1=21, x2=1, y1=2, y2=0, y3=19] [L36] EXPR counter++ VAL [\old(counter)=0, counter=3, counter++=2, x1=21, x2=1, y1=2, y2=0, y3=19] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=3, x1=21, x2=1, y1=2, y2=0, y3=19] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=3, x1=21, x2=1, y1=2, y2=0, y3=19] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=3, x1=21, x2=1, y1=3, y2=0, y3=18] [L36] EXPR counter++ VAL [\old(counter)=0, counter=4, counter++=3, x1=21, x2=1, y1=3, y2=0, y3=18] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=4, x1=21, x2=1, y1=3, y2=0, y3=18] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=4, x1=21, x2=1, y1=3, y2=0, y3=18] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=4, x1=21, x2=1, y1=4, y2=0, y3=17] [L36] EXPR counter++ VAL [\old(counter)=0, counter=5, counter++=4, x1=21, x2=1, y1=4, y2=0, y3=17] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=5, x1=21, x2=1, y1=4, y2=0, y3=17] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=5, x1=21, x2=1, y1=4, y2=0, y3=17] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=5, x1=21, x2=1, y1=5, y2=0, y3=16] [L36] EXPR counter++ VAL [\old(counter)=0, counter=6, counter++=5, x1=21, x2=1, y1=5, y2=0, y3=16] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=6, x1=21, x2=1, y1=5, y2=0, y3=16] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=6, x1=21, x2=1, y1=5, y2=0, y3=16] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=6, x1=21, x2=1, y1=6, y2=0, y3=15] [L36] EXPR counter++ VAL [\old(counter)=0, counter=7, counter++=6, x1=21, x2=1, y1=6, y2=0, y3=15] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=7, x1=21, x2=1, y1=6, y2=0, y3=15] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=7, x1=21, x2=1, y1=6, y2=0, y3=15] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=7, x1=21, x2=1, y1=7, y2=0, y3=14] [L36] EXPR counter++ VAL [\old(counter)=0, counter=8, counter++=7, x1=21, x2=1, y1=7, y2=0, y3=14] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=8, x1=21, x2=1, y1=7, y2=0, y3=14] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=8, x1=21, x2=1, y1=7, y2=0, y3=14] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=8, x1=21, x2=1, y1=8, y2=0, y3=13] [L36] EXPR counter++ VAL [\old(counter)=0, counter=9, counter++=8, x1=21, x2=1, y1=8, y2=0, y3=13] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=9, x1=21, x2=1, y1=8, y2=0, y3=13] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=9, x1=21, x2=1, y1=8, y2=0, y3=13] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=9, x1=21, x2=1, y1=9, y2=0, y3=12] [L36] EXPR counter++ VAL [\old(counter)=0, counter=10, counter++=9, x1=21, x2=1, y1=9, y2=0, y3=12] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=10, x1=21, x2=1, y1=9, y2=0, y3=12] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=10, x1=21, x2=1, y1=9, y2=0, y3=12] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=10, x1=21, x2=1, y1=10, y2=0, y3=11] [L36] EXPR counter++ VAL [\old(counter)=0, counter=11, counter++=10, x1=21, x2=1, y1=10, y2=0, y3=11] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=11] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=11] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=11, x1=21, x2=1, y1=10, y2=0, y3=11] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=11, x1=21, x2=1, y1=10, y2=0, y3=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=11, x1=21, x2=1, y1=11, y2=0, y3=10] [L36] EXPR counter++ VAL [\old(counter)=0, counter=12, counter++=11, x1=21, x2=1, y1=11, y2=0, y3=10] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=12] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=12] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=12, x1=21, x2=1, y1=11, y2=0, y3=10] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=12, x1=21, x2=1, y1=11, y2=0, y3=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=12, x1=21, x2=1, y1=12, y2=0, y3=9] [L36] EXPR counter++ VAL [\old(counter)=0, counter=13, counter++=12, x1=21, x2=1, y1=12, y2=0, y3=9] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=13, x1=21, x2=1, y1=12, y2=0, y3=9] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=13, x1=21, x2=1, y1=12, y2=0, y3=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=13, x1=21, x2=1, y1=13, y2=0, y3=8] [L36] EXPR counter++ VAL [\old(counter)=0, counter=14, counter++=13, x1=21, x2=1, y1=13, y2=0, y3=8] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=14] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=14] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=14, x1=21, x2=1, y1=13, y2=0, y3=8] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=14, x1=21, x2=1, y1=13, y2=0, y3=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=14, x1=21, x2=1, y1=14, y2=0, y3=7] [L36] EXPR counter++ VAL [\old(counter)=0, counter=15, counter++=14, x1=21, x2=1, y1=14, y2=0, y3=7] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=15] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=15] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=15, x1=21, x2=1, y1=14, y2=0, y3=7] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=15, x1=21, x2=1, y1=14, y2=0, y3=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=15, x1=21, x2=1, y1=15, y2=0, y3=6] [L36] EXPR counter++ VAL [\old(counter)=0, counter=16, counter++=15, x1=21, x2=1, y1=15, y2=0, y3=6] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=16] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=16] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=16, x1=21, x2=1, y1=15, y2=0, y3=6] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=16, x1=21, x2=1, y1=15, y2=0, y3=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=16, x1=21, x2=1, y1=16, y2=0, y3=5] [L36] EXPR counter++ VAL [\old(counter)=0, counter=17, counter++=16, x1=21, x2=1, y1=16, y2=0, y3=5] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=17, x1=21, x2=1, y1=16, y2=0, y3=5] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=17, x1=21, x2=1, y1=16, y2=0, y3=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=17, x1=21, x2=1, y1=17, y2=0, y3=4] [L36] EXPR counter++ VAL [\old(counter)=0, counter=18, counter++=17, x1=21, x2=1, y1=17, y2=0, y3=4] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=18] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=18] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=18, x1=21, x2=1, y1=17, y2=0, y3=4] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=18, x1=21, x2=1, y1=17, y2=0, y3=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=18, x1=21, x2=1, y1=18, y2=0, y3=3] [L36] EXPR counter++ VAL [\old(counter)=0, counter=19, counter++=18, x1=21, x2=1, y1=18, y2=0, y3=3] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=19] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=19] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=19, x1=21, x2=1, y1=18, y2=0, y3=3] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=19, x1=21, x2=1, y1=18, y2=0, y3=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=19, x1=21, x2=1, y1=19, y2=0, y3=2] [L36] EXPR counter++ VAL [\old(counter)=0, counter=20, counter++=19, x1=21, x2=1, y1=19, y2=0, y3=2] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=20] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=20] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=20, x1=21, x2=1, y1=19, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=20, x1=21, x2=1, y1=19, y2=0, y3=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=20, x1=21, x2=1, y1=20, y2=0, y3=1] [L36] EXPR counter++ VAL [\old(counter)=0, counter=21, counter++=20, x1=21, x2=1, y1=20, y2=0, y3=1] [L36] COND FALSE !(counter++<20) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, \old(counter)=0, counter=21] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17100.8ms, OverallIterations: 24, TraceHistogramMax: 21, EmptinessCheckTime: 34.7ms, AutomataDifference: 3690.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 782 SDtfs, 1059 SDslu, 2457 SDs, 0 SdLazy, 1205 SolverSat, 446 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1175.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2405 GetRequests, 1967 SyntacticMatches, 0 SemanticMatches, 438 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 3290.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=200occurred in iteration=23, InterpolantAutomatonStates: 479, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 236.0ms AutomataMinimizationTime, 23 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 273.2ms SsaConstructionTime, 1108.1ms SatisfiabilityAnalysisTime, 5395.0ms InterpolantComputationTime, 2447 NumberOfCodeBlocks, 2447 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 2221 ConstructedInterpolants, 0 QuantifiedInterpolants, 6433 SizeOfPredicates, 215 NumberOfNonLiveVariables, 7175 ConjunctsInSsa, 504 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 473/11114 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...