/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:35:36,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:35:36,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:35:36,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:35:36,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:35:36,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:35:36,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:35:36,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:35:36,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:35:36,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:35:36,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:35:36,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:35:36,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:35:36,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:35:36,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:35:36,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:35:36,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:35:36,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:35:36,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:35:36,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:35:36,178 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:35:36,207 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:35:36,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:35:36,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:35:36,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:35:36,209 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:35:36,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:35:36,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:35:36,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:35:36,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:35:36,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:35:36,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:35:36,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:35:36,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:35:36,236 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:35:36,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:35:36,236 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:35:36,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:35:36,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:35:36,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:35:36,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:35:36,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:35:36,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:35:36,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:35:36,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:35:36,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:35:36,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:35:36,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:35:36,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:35:36,238 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:35:36,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:35:36,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:35:36,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:35:36,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:35:36,491 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:35:36,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2021-05-06 02:35:36,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b6bfeb1/1981163c1b9344bf88a963a26883a1b7/FLAG0ce462e0b [2021-05-06 02:35:36,875 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:35:36,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2021-05-06 02:35:36,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b6bfeb1/1981163c1b9344bf88a963a26883a1b7/FLAG0ce462e0b [2021-05-06 02:35:37,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b6bfeb1/1981163c1b9344bf88a963a26883a1b7 [2021-05-06 02:35:37,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:35:37,317 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:35:37,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:35:37,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:35:37,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:35:37,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:35:37" (1/1) ... [2021-05-06 02:35:37,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32779826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:37, skipping insertion in model container [2021-05-06 02:35:37,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:35:37" (1/1) ... [2021-05-06 02:35:37,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:35:37,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:35:37,426 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2021-05-06 02:35:37,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:35:37,444 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:35:37,459 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2021-05-06 02:35:37,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:35:37,491 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:35:37,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:37 WrapperNode [2021-05-06 02:35:37,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:35:37,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:35:37,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:35:37,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:35:37,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:37" (1/1) ... [2021-05-06 02:35:37,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:37" (1/1) ... [2021-05-06 02:35:37,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:37" (1/1) ... [2021-05-06 02:35:37,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:37" (1/1) ... [2021-05-06 02:35:37,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:37" (1/1) ... [2021-05-06 02:35:37,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:37" (1/1) ... [2021-05-06 02:35:37,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:37" (1/1) ... [2021-05-06 02:35:37,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:35:37,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:35:37,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:35:37,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:35:37,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:35:37,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:35:37,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:35:37,566 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:35:37,566 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:35:37,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:35:37,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:35:37,566 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:35:37,566 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:35:37,567 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:35:37,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:35:37,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:35:37,567 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:35:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:35:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:35:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:35:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:35:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:35:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:35:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:35:37,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:35:37,860 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:35:37,860 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 02:35:37,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:35:37 BoogieIcfgContainer [2021-05-06 02:35:37,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:35:37,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:35:37,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:35:37,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:35:37,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:35:37" (1/3) ... [2021-05-06 02:35:37,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b14099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:35:37, skipping insertion in model container [2021-05-06 02:35:37,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:35:37" (2/3) ... [2021-05-06 02:35:37,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b14099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:35:37, skipping insertion in model container [2021-05-06 02:35:37,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:35:37" (3/3) ... [2021-05-06 02:35:37,866 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2021-05-06 02:35:37,869 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:35:37,872 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:35:37,884 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:35:37,900 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:35:37,901 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:35:37,901 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:35:37,901 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:35:37,901 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:35:37,901 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:35:37,901 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:35:37,901 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:35:37,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:35:37,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 02:35:37,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:37,916 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 02:35:37,916 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:37,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:37,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2021-05-06 02:35:37,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:37,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037549146] [2021-05-06 02:35:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:38,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:35:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:38,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:35:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:38,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:35:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:38,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:38,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037549146] [2021-05-06 02:35:38,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037549146] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:38,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:38,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:35:38,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276489751] [2021-05-06 02:35:38,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:35:38,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:38,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:35:38,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:35:38,129 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:38,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:38,306 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2021-05-06 02:35:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:35:38,307 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 02:35:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:38,312 INFO L225 Difference]: With dead ends: 74 [2021-05-06 02:35:38,312 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 02:35:38,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:35:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 02:35:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-06 02:35:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 02:35:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-06 02:35:38,381 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-06 02:35:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:38,381 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-06 02:35:38,381 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 02:35:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-06 02:35:38,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:35:38,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:38,382 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:38,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:35:38,383 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:38,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:38,383 INFO L82 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2021-05-06 02:35:38,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:38,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859752319] [2021-05-06 02:35:38,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:38,406 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:38,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777404000] [2021-05-06 02:35:38,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:38,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:35:38,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:38,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:38,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:38,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:38,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:38,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:38,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:38,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859752319] [2021-05-06 02:35:38,635 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:38,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777404000] [2021-05-06 02:35:38,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777404000] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:38,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:38,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:35:38,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867876598] [2021-05-06 02:35:38,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:35:38,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:38,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:35:38,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:35:38,638 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:38,658 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-05-06 02:35:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:35:38,658 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 02:35:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:38,659 INFO L225 Difference]: With dead ends: 44 [2021-05-06 02:35:38,659 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 02:35:38,660 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:35:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 02:35:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 02:35:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 02:35:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 02:35:38,666 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-06 02:35:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:38,666 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 02:35:38,667 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 02:35:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 02:35:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 02:35:38,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:38,667 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:38,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:35:38,873 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:38,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:38,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2021-05-06 02:35:38,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:38,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098997293] [2021-05-06 02:35:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:38,886 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:38,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037146129] [2021-05-06 02:35:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:38,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:35:38,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:39,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:39,047 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 02:35:39,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:39,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098997293] [2021-05-06 02:35:39,047 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:39,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037146129] [2021-05-06 02:35:39,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037146129] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:39,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:39,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 02:35:39,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357710241] [2021-05-06 02:35:39,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:35:39,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:39,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:35:39,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:35:39,049 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:35:39,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:39,144 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-05-06 02:35:39,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:35:39,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-06 02:35:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:39,149 INFO L225 Difference]: With dead ends: 57 [2021-05-06 02:35:39,149 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 02:35:39,150 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:39,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 02:35:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-06 02:35:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 02:35:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-06 02:35:39,158 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-06 02:35:39,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:39,158 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-06 02:35:39,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:35:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-06 02:35:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 02:35:39,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:39,159 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 02:35:39,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:39,375 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:39,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2021-05-06 02:35:39,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:39,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285243537] [2021-05-06 02:35:39,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:39,392 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:39,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842842357] [2021-05-06 02:35:39,392 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 02:35:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:39,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:35:39,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:39,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:39,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:39,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:39,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:39,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:39,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:39,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:39,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:39,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285243537] [2021-05-06 02:35:39,594 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842842357] [2021-05-06 02:35:39,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842842357] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:39,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:39,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:35:39,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920535253] [2021-05-06 02:35:39,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:35:39,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:39,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:35:39,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:35:39,596 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:39,628 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2021-05-06 02:35:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:35:39,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 02:35:39,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:39,632 INFO L225 Difference]: With dead ends: 62 [2021-05-06 02:35:39,632 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 02:35:39,632 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:35:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 02:35:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 02:35:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 02:35:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-06 02:35:39,642 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-06 02:35:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:39,642 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-06 02:35:39,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-06 02:35:39,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 02:35:39,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:39,643 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:39,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:39,851 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:39,851 INFO L82 PathProgramCache]: Analyzing trace with hash 795698770, now seen corresponding path program 1 times [2021-05-06 02:35:39,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:39,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698805666] [2021-05-06 02:35:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:39,866 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:39,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601883851] [2021-05-06 02:35:39,866 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 02:35:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:39,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:35:39,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:39,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,020 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 02:35:40,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:40,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698805666] [2021-05-06 02:35:40,021 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:40,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601883851] [2021-05-06 02:35:40,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601883851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:40,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:40,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 02:35:40,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035580411] [2021-05-06 02:35:40,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:35:40,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:40,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:35:40,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:40,022 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 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 02:35:40,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:40,119 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2021-05-06 02:35:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:35:40,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 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 29 [2021-05-06 02:35:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:40,121 INFO L225 Difference]: With dead ends: 58 [2021-05-06 02:35:40,121 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 02:35:40,123 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:35:40,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 02:35:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 02:35:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:35:40,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-06 02:35:40,138 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-06 02:35:40,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:40,138 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-06 02:35:40,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 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 02:35:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-06 02:35:40,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 02:35:40,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:40,141 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:40,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:40,342 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:40,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:40,342 INFO L82 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2021-05-06 02:35:40,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:40,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88868916] [2021-05-06 02:35:40,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:40,353 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:40,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409096696] [2021-05-06 02:35:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:40,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:35:40,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:40,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:40,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:40,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88868916] [2021-05-06 02:35:40,494 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:40,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409096696] [2021-05-06 02:35:40,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409096696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:40,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:40,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:35:40,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643323397] [2021-05-06 02:35:40,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:35:40,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:40,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:35:40,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:35:40,496 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:40,532 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2021-05-06 02:35:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:35:40,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-05-06 02:35:40,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:40,534 INFO L225 Difference]: With dead ends: 67 [2021-05-06 02:35:40,534 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 02:35:40,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:35:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 02:35:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 02:35:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:35:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-06 02:35:40,557 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-06 02:35:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:40,557 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-06 02:35:40,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-06 02:35:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 02:35:40,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:40,558 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:40,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:35:40,759 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:40,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:40,759 INFO L82 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2021-05-06 02:35:40,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:40,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512269897] [2021-05-06 02:35:40,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:40,768 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:40,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242201884] [2021-05-06 02:35:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:40,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:35:40,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:40,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:35:40,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:40,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512269897] [2021-05-06 02:35:40,927 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:40,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242201884] [2021-05-06 02:35:40,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242201884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:40,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:40,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:35:40,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143856326] [2021-05-06 02:35:40,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:35:40,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:40,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:35:40,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:40,928 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:41,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:41,064 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2021-05-06 02:35:41,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:35:41,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-06 02:35:41,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:41,066 INFO L225 Difference]: With dead ends: 138 [2021-05-06 02:35:41,066 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 02:35:41,066 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:35:41,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 02:35:41,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-06 02:35:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:35:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-06 02:35:41,074 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-06 02:35:41,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:41,074 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-06 02:35:41,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-06 02:35:41,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:35:41,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:41,075 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:41,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:41,289 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:41,289 INFO L82 PathProgramCache]: Analyzing trace with hash 495607521, now seen corresponding path program 1 times [2021-05-06 02:35:41,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:41,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76258141] [2021-05-06 02:35:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:41,303 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:41,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878600347] [2021-05-06 02:35:41,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:41,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:35:41,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:41,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:35:41,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:41,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76258141] [2021-05-06 02:35:41,462 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:41,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878600347] [2021-05-06 02:35:41,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878600347] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:41,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:41,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 02:35:41,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490995696] [2021-05-06 02:35:41,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:35:41,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:41,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:35:41,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:41,463 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:35:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:41,532 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2021-05-06 02:35:41,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:35:41,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-05-06 02:35:41,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:41,534 INFO L225 Difference]: With dead ends: 95 [2021-05-06 02:35:41,534 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 02:35:41,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:35:41,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 02:35:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 02:35:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:35:41,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-06 02:35:41,540 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-06 02:35:41,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:41,540 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-06 02:35:41,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:35:41,541 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-06 02:35:41,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 02:35:41,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:41,541 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:41,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:41,749 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:41,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:41,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 1 times [2021-05-06 02:35:41,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:41,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321042226] [2021-05-06 02:35:41,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:41,758 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:41,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262413955] [2021-05-06 02:35:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:41,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:35:41,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:41,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:41,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:41,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321042226] [2021-05-06 02:35:41,872 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:41,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262413955] [2021-05-06 02:35:41,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262413955] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:41,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:41,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 02:35:41,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051836091] [2021-05-06 02:35:41,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:35:41,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:41,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:35:41,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:35:41,873 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:41,900 INFO L93 Difference]: Finished difference Result 135 states and 184 transitions. [2021-05-06 02:35:41,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:35:41,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-05-06 02:35:41,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:41,902 INFO L225 Difference]: With dead ends: 135 [2021-05-06 02:35:41,902 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 02:35:41,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:35:41,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 02:35:41,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-06 02:35:41,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:35:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-06 02:35:41,908 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-06 02:35:41,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:41,908 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-06 02:35:41,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:41,908 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-06 02:35:41,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 02:35:41,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:41,909 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:42,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:35:42,126 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:42,126 INFO L82 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 1 times [2021-05-06 02:35:42,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:42,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562619102] [2021-05-06 02:35:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:42,135 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:42,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486887665] [2021-05-06 02:35:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:42,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:35:42,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:42,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:42,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:42,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562619102] [2021-05-06 02:35:42,266 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:42,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486887665] [2021-05-06 02:35:42,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486887665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:42,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:42,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:35:42,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050243851] [2021-05-06 02:35:42,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:35:42,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:42,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:35:42,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:35:42,267 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:42,318 INFO L93 Difference]: Finished difference Result 171 states and 233 transitions. [2021-05-06 02:35:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:35:42,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-06 02:35:42,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:42,320 INFO L225 Difference]: With dead ends: 171 [2021-05-06 02:35:42,320 INFO L226 Difference]: Without dead ends: 120 [2021-05-06 02:35:42,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-06 02:35:42,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-06 02:35:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 02:35:42,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-06 02:35:42,328 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-06 02:35:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:42,329 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-06 02:35:42,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:42,329 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-06 02:35:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 02:35:42,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:42,329 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:42,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:42,545 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2021-05-06 02:35:42,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:42,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339978569] [2021-05-06 02:35:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:42,552 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:42,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314983267] [2021-05-06 02:35:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:42,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:35:42,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:42,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:35:42,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:42,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339978569] [2021-05-06 02:35:42,710 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:42,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314983267] [2021-05-06 02:35:42,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314983267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:42,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:42,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:35:42,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527328333] [2021-05-06 02:35:42,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:35:42,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:42,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:35:42,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:35:42,711 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:42,807 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2021-05-06 02:35:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:35:42,807 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-06 02:35:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:42,808 INFO L225 Difference]: With dead ends: 154 [2021-05-06 02:35:42,808 INFO L226 Difference]: Without dead ends: 152 [2021-05-06 02:35:42,809 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:35:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-06 02:35:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-06 02:35:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-06 02:35:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-06 02:35:42,817 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-06 02:35:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:42,818 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-06 02:35:42,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-06 02:35:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:35:42,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:42,818 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:43,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:43,033 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:43,033 INFO L82 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 2 times [2021-05-06 02:35:43,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:43,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870270669] [2021-05-06 02:35:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:43,040 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:43,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708935003] [2021-05-06 02:35:43,040 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 02:35:43,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:35:43,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:35:43,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:35:43,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:43,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:43,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:43,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870270669] [2021-05-06 02:35:43,182 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:43,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708935003] [2021-05-06 02:35:43,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708935003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:43,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:43,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:35:43,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671328342] [2021-05-06 02:35:43,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:35:43,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:35:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:43,184 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:43,252 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2021-05-06 02:35:43,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:35:43,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-05-06 02:35:43,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:43,253 INFO L225 Difference]: With dead ends: 189 [2021-05-06 02:35:43,253 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 02:35:43,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:35:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 02:35:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-06 02:35:43,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 02:35:43,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-06 02:35:43,263 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-06 02:35:43,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:43,263 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-06 02:35:43,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:43,263 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-06 02:35:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:35:43,263 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:43,264 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:43,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:35:43,477 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:43,477 INFO L82 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2021-05-06 02:35:43,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:43,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934934115] [2021-05-06 02:35:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:43,486 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:43,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28643844] [2021-05-06 02:35:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:43,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:35:43,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:43,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 02:35:43,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:43,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934934115] [2021-05-06 02:35:43,623 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:43,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28643844] [2021-05-06 02:35:43,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28643844] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:43,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:43,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 02:35:43,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240307115] [2021-05-06 02:35:43,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:35:43,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:43,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:35:43,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:35:43,626 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:35:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:43,723 INFO L93 Difference]: Finished difference Result 195 states and 258 transitions. [2021-05-06 02:35:43,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:35:43,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 02:35:43,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:43,727 INFO L225 Difference]: With dead ends: 195 [2021-05-06 02:35:43,728 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 02:35:43,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:35:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 02:35:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 02:35:43,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 02:35:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-06 02:35:43,738 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-06 02:35:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:43,739 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-06 02:35:43,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:35:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-06 02:35:43,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 02:35:43,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:43,739 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:43,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:35:43,959 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:43,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:43,959 INFO L82 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2021-05-06 02:35:43,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:43,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443607034] [2021-05-06 02:35:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:43,965 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:43,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425786166] [2021-05-06 02:35:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:44,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:35:44,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:44,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:44,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:44,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443607034] [2021-05-06 02:35:44,159 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:44,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425786166] [2021-05-06 02:35:44,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425786166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:44,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:44,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:35:44,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145348011] [2021-05-06 02:35:44,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:35:44,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:44,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:35:44,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:35:44,162 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:35:44,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:44,333 INFO L93 Difference]: Finished difference Result 204 states and 263 transitions. [2021-05-06 02:35:44,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:35:44,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-05-06 02:35:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:44,334 INFO L225 Difference]: With dead ends: 204 [2021-05-06 02:35:44,334 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 02:35:44,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:35:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 02:35:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-05-06 02:35:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 145 states have (on average 1.289655172413793) internal successors, (187), 147 states have internal predecessors, (187), 37 states have call successors, (37), 18 states have call predecessors, (37), 17 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 02:35:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 259 transitions. [2021-05-06 02:35:44,364 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 259 transitions. Word has length 41 [2021-05-06 02:35:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:44,365 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 259 transitions. [2021-05-06 02:35:44,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:35:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 259 transitions. [2021-05-06 02:35:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:35:44,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:44,366 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:44,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:35:44,583 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:44,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:44,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2021-05-06 02:35:44,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:44,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302098288] [2021-05-06 02:35:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:44,590 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:44,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441366614] [2021-05-06 02:35:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:44,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:35:44,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:44,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:35:44,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:44,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302098288] [2021-05-06 02:35:44,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:44,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441366614] [2021-05-06 02:35:44,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441366614] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:44,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:44,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:35:44,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589937138] [2021-05-06 02:35:44,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:35:44,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:44,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:35:44,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:35:44,708 INFO L87 Difference]: Start difference. First operand 200 states and 259 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:35:44,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:44,753 INFO L93 Difference]: Finished difference Result 264 states and 362 transitions. [2021-05-06 02:35:44,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:35:44,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-05-06 02:35:44,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:44,754 INFO L225 Difference]: With dead ends: 264 [2021-05-06 02:35:44,754 INFO L226 Difference]: Without dead ends: 262 [2021-05-06 02:35:44,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:35:44,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-06 02:35:44,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 234. [2021-05-06 02:35:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 158 states have (on average 1.2911392405063291) internal successors, (204), 165 states have internal predecessors, (204), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 02:35:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 316 transitions. [2021-05-06 02:35:44,769 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 316 transitions. Word has length 44 [2021-05-06 02:35:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:44,769 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 316 transitions. [2021-05-06 02:35:44,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:35:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 316 transitions. [2021-05-06 02:35:44,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:35:44,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:44,770 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:44,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:44,985 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:44,985 INFO L82 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 1 times [2021-05-06 02:35:44,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:44,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943396669] [2021-05-06 02:35:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:44,991 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:44,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849981976] [2021-05-06 02:35:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:45,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:35:45,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:45,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:35:45,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:45,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943396669] [2021-05-06 02:35:45,123 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:45,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849981976] [2021-05-06 02:35:45,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849981976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:45,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:45,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:35:45,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370841877] [2021-05-06 02:35:45,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:35:45,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:45,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:35:45,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:35:45,124 INFO L87 Difference]: Start difference. First operand 234 states and 316 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:45,191 INFO L93 Difference]: Finished difference Result 387 states and 542 transitions. [2021-05-06 02:35:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:35:45,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-05-06 02:35:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:45,193 INFO L225 Difference]: With dead ends: 387 [2021-05-06 02:35:45,193 INFO L226 Difference]: Without dead ends: 245 [2021-05-06 02:35:45,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:35:45,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-06 02:35:45,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2021-05-06 02:35:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 165 states have (on average 1.2787878787878788) internal successors, (211), 171 states have internal predecessors, (211), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 02:35:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 323 transitions. [2021-05-06 02:35:45,206 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 323 transitions. Word has length 42 [2021-05-06 02:35:45,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:45,206 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 323 transitions. [2021-05-06 02:35:45,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:35:45,206 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 323 transitions. [2021-05-06 02:35:45,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 02:35:45,207 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:45,207 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:45,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:35:45,421 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:45,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:45,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1912500411, now seen corresponding path program 2 times [2021-05-06 02:35:45,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:45,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475080338] [2021-05-06 02:35:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:45,427 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:45,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801116401] [2021-05-06 02:35:45,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:45,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:35:45,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:35:45,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:35:45,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:45,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-06 02:35:45,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:45,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475080338] [2021-05-06 02:35:45,532 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:45,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801116401] [2021-05-06 02:35:45,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801116401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:35:45,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:35:45,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:35:45,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416862310] [2021-05-06 02:35:45,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:35:45,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:45,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:35:45,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:35:45,533 INFO L87 Difference]: Start difference. First operand 241 states and 323 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:35:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:45,600 INFO L93 Difference]: Finished difference Result 449 states and 662 transitions. [2021-05-06 02:35:45,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:35:45,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-05-06 02:35:45,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:45,602 INFO L225 Difference]: With dead ends: 449 [2021-05-06 02:35:45,602 INFO L226 Difference]: Without dead ends: 379 [2021-05-06 02:35:45,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:35:45,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-06 02:35:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 265. [2021-05-06 02:35:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 189 states have (on average 1.2962962962962963) internal successors, (245), 195 states have internal predecessors, (245), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 02:35:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2021-05-06 02:35:45,619 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 43 [2021-05-06 02:35:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:45,619 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2021-05-06 02:35:45,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:35:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2021-05-06 02:35:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 02:35:45,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:45,619 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:45,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:35:45,830 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:45,831 INFO L82 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2021-05-06 02:35:45,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:45,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687864160] [2021-05-06 02:35:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:45,835 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:45,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895230523] [2021-05-06 02:35:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:35:45,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:45,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 02:35:45,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:45,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687864160] [2021-05-06 02:35:45,992 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:45,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895230523] [2021-05-06 02:35:45,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895230523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:45,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:45,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:35:45,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97814713] [2021-05-06 02:35:45,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:35:45,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:45,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:35:45,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:35:45,993 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:35:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:46,217 INFO L93 Difference]: Finished difference Result 341 states and 479 transitions. [2021-05-06 02:35:46,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:35:46,218 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-06 02:35:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:46,219 INFO L225 Difference]: With dead ends: 341 [2021-05-06 02:35:46,219 INFO L226 Difference]: Without dead ends: 339 [2021-05-06 02:35:46,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:35:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-06 02:35:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 296. [2021-05-06 02:35:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 203 states have (on average 1.3103448275862069) internal successors, (266), 211 states have internal predecessors, (266), 73 states have call successors, (73), 20 states have call predecessors, (73), 19 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 02:35:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 410 transitions. [2021-05-06 02:35:46,238 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 410 transitions. Word has length 46 [2021-05-06 02:35:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:46,239 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 410 transitions. [2021-05-06 02:35:46,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:35:46,239 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 410 transitions. [2021-05-06 02:35:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 02:35:46,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:46,239 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:46,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:35:46,457 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:46,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:46,457 INFO L82 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2021-05-06 02:35:46,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:46,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747097115] [2021-05-06 02:35:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:46,462 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:46,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181977285] [2021-05-06 02:35:46,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:35:46,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 02:35:46,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:35:46,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:35:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:35:46,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:35:46,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747097115] [2021-05-06 02:35:46,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:35:46,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181977285] [2021-05-06 02:35:46,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181977285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:35:46,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:35:46,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:35:46,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431211367] [2021-05-06 02:35:46,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:35:46,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:35:46,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:35:46,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:35:46,710 INFO L87 Difference]: Start difference. First operand 296 states and 410 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:35:47,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:35:47,071 INFO L93 Difference]: Finished difference Result 343 states and 480 transitions. [2021-05-06 02:35:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:35:47,077 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-05-06 02:35:47,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:35:47,078 INFO L225 Difference]: With dead ends: 343 [2021-05-06 02:35:47,078 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 02:35:47,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:35:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 02:35:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2021-05-06 02:35:47,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 225 states have (on average 1.3155555555555556) internal successors, (296), 235 states have internal predecessors, (296), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2021-05-06 02:35:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 472 transitions. [2021-05-06 02:35:47,095 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 472 transitions. Word has length 58 [2021-05-06 02:35:47,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:35:47,095 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 472 transitions. [2021-05-06 02:35:47,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:35:47,095 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 472 transitions. [2021-05-06 02:35:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 02:35:47,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:35:47,096 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:35:47,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:47,309 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:35:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:35:47,309 INFO L82 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 1 times [2021-05-06 02:35:47,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:35:47,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823710473] [2021-05-06 02:35:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:35:47,314 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:35:47,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380384823] [2021-05-06 02:35:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 02:35:47,372 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:35:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 02:35:47,394 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:35:47,444 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 02:35:47,444 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 02:35:47,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:35:47,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:35:47 BoogieIcfgContainer [2021-05-06 02:35:47,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:35:47,678 INFO L168 Benchmark]: Toolchain (without parser) took 10361.84 ms. Allocated memory was 209.7 MB in the beginning and 352.3 MB in the end (delta: 142.6 MB). Free memory was 174.6 MB in the beginning and 213.9 MB in the end (delta: -39.3 MB). Peak memory consumption was 104.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:35:47,679 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 209.7 MB. Free memory is still 191.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:35:47,679 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.91 ms. Allocated memory is still 209.7 MB. Free memory was 174.4 MB in the beginning and 192.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-05-06 02:35:47,679 INFO L168 Benchmark]: Boogie Preprocessor took 21.62 ms. Allocated memory is still 209.7 MB. Free memory was 192.6 MB in the beginning and 191.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:35:47,679 INFO L168 Benchmark]: RCFGBuilder took 346.88 ms. Allocated memory is still 209.7 MB. Free memory was 191.1 MB in the beginning and 173.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:35:47,679 INFO L168 Benchmark]: TraceAbstraction took 9816.21 ms. Allocated memory was 209.7 MB in the beginning and 352.3 MB in the end (delta: 142.6 MB). Free memory was 172.8 MB in the beginning and 213.9 MB in the end (delta: -41.1 MB). Peak memory consumption was 102.9 MB. Max. memory is 8.0 GB. [2021-05-06 02:35:47,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 209.7 MB. Free memory is still 191.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 171.91 ms. Allocated memory is still 209.7 MB. Free memory was 174.4 MB in the beginning and 192.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.62 ms. Allocated memory is still 209.7 MB. Free memory was 192.6 MB in the beginning and 191.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 346.88 ms. Allocated memory is still 209.7 MB. Free memory was 191.1 MB in the beginning and 173.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9816.21 ms. Allocated memory was 209.7 MB in the beginning and 352.3 MB in the end (delta: 142.6 MB). Free memory was 172.8 MB in the beginning and 213.9 MB in the end (delta: -41.1 MB). Peak memory consumption was 102.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=17, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=2, b=3, counter=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] COND TRUE counter++<5 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] COND FALSE !(counter++<5) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=7] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9745.7ms, OverallIterations: 20, TraceHistogramMax: 5, EmptinessCheckTime: 16.4ms, AutomataDifference: 2020.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 945 SDtfs, 870 SDslu, 3456 SDs, 0 SdLazy, 1730 SolverSat, 394 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1042.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 696 GetRequests, 549 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 841.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=336occurred in iteration=19, InterpolantAutomatonStates: 150, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 265.3ms AutomataMinimizationTime, 19 MinimizatonAttempts, 271 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 162.1ms SsaConstructionTime, 453.2ms SatisfiabilityAnalysisTime, 1851.1ms InterpolantComputationTime, 742 NumberOfCodeBlocks, 742 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 660 ConstructedInterpolants, 0 QuantifiedInterpolants, 2655 SizeOfPredicates, 64 NumberOfNonLiveVariables, 3220 ConjunctsInSsa, 267 ConjunctsInUnsatCore, 19 InterpolantComputations, 10 PerfectInterpolantSequences, 174/242 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...