/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/sqrt1-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:11:10,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:11:10,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:11:10,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 05:11:10,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:11:10,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:11:10,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:11:10,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:11:10,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:11:10,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:11:10,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:11:10,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:11:10,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:11:10,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:11:10,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:11:10,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:11:10,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 05:11:10,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:11:10,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:11:10,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:11:10,754 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 05:11:10,795 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:11:10,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:11:10,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 05:11:10,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 05:11:10,797 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 05:11:10,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:11:10,798 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:11:10,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:11:10,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:11:10,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:11:10,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:11:10,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:11:10,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:11:10,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:11:10,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:11:10,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:11:10,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:11:10,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:11:10,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:11:10,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:11:10,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:11:10,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:11:10,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 05:11:10,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 05:11:10,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:11:10,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 05:11:10,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 05:11:10,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 05:11:10,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:11:11,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:11:11,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:11:11,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:11:11,080 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:11:11,081 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:11:11,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2021-05-06 05:11:11,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/423434d76/f15335c98a034bd3aeb123c2b9f208a2/FLAG06a207f11 [2021-05-06 05:11:11,469 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:11:11,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2021-05-06 05:11:11,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/423434d76/f15335c98a034bd3aeb123c2b9f208a2/FLAG06a207f11 [2021-05-06 05:11:11,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/423434d76/f15335c98a034bd3aeb123c2b9f208a2 [2021-05-06 05:11:11,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:11:11,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 05:11:11,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:11:11,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:11:11,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:11:11,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:11:11" (1/1) ... [2021-05-06 05:11:11,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1676131a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:11, skipping insertion in model container [2021-05-06 05:11:11,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:11:11" (1/1) ... [2021-05-06 05:11:11,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:11:11,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:11:12,023 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/sqrt1-ll_unwindbound50.c[520,533] [2021-05-06 05:11:12,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:11:12,042 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:11:12,050 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/sqrt1-ll_unwindbound50.c[520,533] [2021-05-06 05:11:12,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:11:12,075 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:11:12,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:12 WrapperNode [2021-05-06 05:11:12,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:11:12,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:11:12,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:11:12,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:11:12,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:12" (1/1) ... [2021-05-06 05:11:12,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:12" (1/1) ... [2021-05-06 05:11:12,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:12" (1/1) ... [2021-05-06 05:11:12,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:12" (1/1) ... [2021-05-06 05:11:12,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:12" (1/1) ... [2021-05-06 05:11:12,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:12" (1/1) ... [2021-05-06 05:11:12,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:12" (1/1) ... [2021-05-06 05:11:12,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:11:12,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:11:12,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:11:12,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:11:12,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:12" (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 05:11:12,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:11:12,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:11:12,189 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:11:12,189 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:11:12,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:11:12,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:11:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:11:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:11:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:11:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:11:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 05:11:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:11:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:11:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:11:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:11:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:11:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:11:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:11:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:11:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:11:12,391 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:11:12,391 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:11:12,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:11:12 BoogieIcfgContainer [2021-05-06 05:11:12,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:11:12,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:11:12,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:11:12,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:11:12,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:11:11" (1/3) ... [2021-05-06 05:11:12,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33eb2d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:11:12, skipping insertion in model container [2021-05-06 05:11:12,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:12" (2/3) ... [2021-05-06 05:11:12,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33eb2d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:11:12, skipping insertion in model container [2021-05-06 05:11:12,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:11:12" (3/3) ... [2021-05-06 05:11:12,397 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound50.c [2021-05-06 05:11:12,400 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:11:12,402 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:11:12,412 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:11:12,426 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:11:12,426 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 05:11:12,426 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 05:11:12,426 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:11:12,426 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:11:12,426 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:11:12,427 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:11:12,427 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:11:12,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 05:11:12,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 05:11:12,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:12,439 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:12,440 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:12,443 INFO L82 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2021-05-06 05:11:12,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:12,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140519346] [2021-05-06 05:11:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:12,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:11:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:11:12,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:12,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140519346] [2021-05-06 05:11:12,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140519346] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:12,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:12,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:11:12,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623026192] [2021-05-06 05:11:12,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:11:12,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:12,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:11:12,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:11:12,642 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:11:12,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:12,767 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-05-06 05:11:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:11:12,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 05:11:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:12,774 INFO L225 Difference]: With dead ends: 47 [2021-05-06 05:11:12,774 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 05:11:12,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:11:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 05:11:12,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 05:11:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 05:11:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-06 05:11:12,807 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-06 05:11:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:12,807 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-06 05:11:12,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:11:12,807 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-06 05:11:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 05:11:12,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:12,809 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:12,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:11:12,809 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:12,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:12,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2021-05-06 05:11:12,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:12,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11544038] [2021-05-06 05:11:12,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:12,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:11:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:11:12,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:12,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11544038] [2021-05-06 05:11:12,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11544038] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:12,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:12,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 05:11:12,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305371626] [2021-05-06 05:11:12,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:11:12,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:12,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:11:12,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:11:12,957 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:11:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:13,043 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-05-06 05:11:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:13,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 05:11:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:13,045 INFO L225 Difference]: With dead ends: 32 [2021-05-06 05:11:13,045 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 05:11:13,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:13,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 05:11:13,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 05:11:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 05:11:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-06 05:11:13,063 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-06 05:11:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:13,064 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-06 05:11:13,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:11:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-06 05:11:13,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 05:11:13,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:13,066 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:13,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:11:13,066 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:13,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:13,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2021-05-06 05:11:13,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:13,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109844091] [2021-05-06 05:11:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:13,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:11:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:11:13,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:13,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109844091] [2021-05-06 05:11:13,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109844091] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:13,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:13,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:11:13,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417782856] [2021-05-06 05:11:13,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:13,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:13,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:13,193 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:11:13,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:13,415 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-06 05:11:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:11:13,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 05:11:13,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:13,416 INFO L225 Difference]: With dead ends: 36 [2021-05-06 05:11:13,416 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 05:11:13,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:11:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 05:11:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-06 05:11:13,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 05:11:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 05:11:13,423 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-06 05:11:13,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:13,423 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 05:11:13,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:11:13,424 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 05:11:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:11:13,424 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:13,424 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:13,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 05:11:13,425 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:13,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:13,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 1 times [2021-05-06 05:11:13,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:13,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441383074] [2021-05-06 05:11:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:13,465 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:13,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731218540] [2021-05-06 05:11:13,465 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 05:11:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:13,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:11:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:13,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:11:13,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:13,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441383074] [2021-05-06 05:11:13,620 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:13,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731218540] [2021-05-06 05:11:13,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731218540] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:13,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:13,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:11:13,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003215769] [2021-05-06 05:11:13,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:11:13,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:13,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:11:13,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:11:13,622 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:11:13,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:13,667 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-06 05:11:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:11:13,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-06 05:11:13,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:13,668 INFO L225 Difference]: With dead ends: 40 [2021-05-06 05:11:13,668 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 05:11:13,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 05:11:13,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-06 05:11:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 05:11:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 05:11:13,675 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2021-05-06 05:11:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:13,675 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 05:11:13,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:11:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 05:11:13,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:11:13,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:13,676 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:13,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:13,885 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:13,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:13,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1129080132, now seen corresponding path program 1 times [2021-05-06 05:11:13,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:13,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229719158] [2021-05-06 05:11:13,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:13,892 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:13,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267764929] [2021-05-06 05:11:13,892 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 05:11:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:13,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:11:13,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:14,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:14,022 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 05:11:14,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:14,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229719158] [2021-05-06 05:11:14,023 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:14,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267764929] [2021-05-06 05:11:14,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267764929] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:14,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:14,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:11:14,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414327837] [2021-05-06 05:11:14,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:11:14,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:14,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:11:14,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:11:14,024 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:11:14,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:14,056 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-06 05:11:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:11:14,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 05:11:14,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:14,058 INFO L225 Difference]: With dead ends: 44 [2021-05-06 05:11:14,058 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 05:11:14,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 05:11:14,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 05:11:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:11:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-06 05:11:14,072 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-06 05:11:14,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:14,072 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-06 05:11:14,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:11:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-06 05:11:14,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 05:11:14,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:14,073 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:14,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:14,289 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:14,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1326533350, now seen corresponding path program 1 times [2021-05-06 05:11:14,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:14,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157406990] [2021-05-06 05:11:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:14,296 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:14,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784555784] [2021-05-06 05:11:14,296 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 05:11:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:14,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:11:14,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:14,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:14,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:14,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:14,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:14,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:14,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:14,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:14,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:11:14,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:14,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157406990] [2021-05-06 05:11:14,439 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:14,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784555784] [2021-05-06 05:11:14,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784555784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:14,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:14,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 05:11:14,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726962810] [2021-05-06 05:11:14,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:11:14,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:14,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:11:14,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:11:14,440 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 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 05:11:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:14,474 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-05-06 05:11:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:14,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 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 30 [2021-05-06 05:11:14,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:14,475 INFO L225 Difference]: With dead ends: 50 [2021-05-06 05:11:14,475 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 05:11:14,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 05:11:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 05:11:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:11:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-05-06 05:11:14,488 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2021-05-06 05:11:14,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:14,488 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-05-06 05:11:14,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 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 05:11:14,489 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-05-06 05:11:14,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 05:11:14,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:14,489 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] [2021-05-06 05:11:14,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:14,696 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:14,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1324865054, now seen corresponding path program 1 times [2021-05-06 05:11:14,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:14,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6335921] [2021-05-06 05:11:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:14,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:14,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188113031] [2021-05-06 05:11:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:11:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:14,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:11:14,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:14,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:11:14,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:14,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6335921] [2021-05-06 05:11:14,841 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:14,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188113031] [2021-05-06 05:11:14,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188113031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:14,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:14,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:14,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824216113] [2021-05-06 05:11:14,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:14,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:14,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:14,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:14,842 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:11:14,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:14,901 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-05-06 05:11:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:14,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 05:11:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:14,906 INFO L225 Difference]: With dead ends: 54 [2021-05-06 05:11:14,906 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 05:11:14,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:14,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 05:11:14,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-05-06 05:11:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 05:11:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-05-06 05:11:14,917 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2021-05-06 05:11:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:14,918 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-05-06 05:11:14,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:11:14,919 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-05-06 05:11:14,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 05:11:14,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:14,919 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:15,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:15,129 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:15,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1080733609, now seen corresponding path program 2 times [2021-05-06 05:11:15,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:15,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357601154] [2021-05-06 05:11:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:15,135 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:15,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998248263] [2021-05-06 05:11:15,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:15,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:11:15,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:15,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:11:15,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:15,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 05:11:15,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:15,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357601154] [2021-05-06 05:11:15,277 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:15,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998248263] [2021-05-06 05:11:15,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998248263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:15,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:15,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:15,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782108235] [2021-05-06 05:11:15,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:15,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:15,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:15,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:15,280 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 05:11:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:15,333 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-05-06 05:11:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:15,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-06 05:11:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:15,337 INFO L225 Difference]: With dead ends: 58 [2021-05-06 05:11:15,337 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 05:11:15,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 05:11:15,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 05:11:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 05:11:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-05-06 05:11:15,348 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 35 [2021-05-06 05:11:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:15,348 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-05-06 05:11:15,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 05:11:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-05-06 05:11:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 05:11:15,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:15,351 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:15,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:15,569 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:15,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1183106562, now seen corresponding path program 3 times [2021-05-06 05:11:15,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:15,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261266342] [2021-05-06 05:11:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:15,575 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:15,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602224859] [2021-05-06 05:11:15,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:15,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 05:11:15,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:15,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:11:15,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:15,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 05:11:15,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:15,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261266342] [2021-05-06 05:11:15,697 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:15,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602224859] [2021-05-06 05:11:15,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602224859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:15,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:15,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:15,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652344119] [2021-05-06 05:11:15,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:15,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:15,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:15,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:15,698 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:11:15,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:15,760 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-05-06 05:11:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:15,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-05-06 05:11:15,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:15,762 INFO L225 Difference]: With dead ends: 62 [2021-05-06 05:11:15,762 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 05:11:15,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:15,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 05:11:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 05:11:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:11:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-05-06 05:11:15,782 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 40 [2021-05-06 05:11:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:15,782 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-05-06 05:11:15,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:11:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-05-06 05:11:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 05:11:15,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:15,787 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:16,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:16,001 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:16,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1332643880, now seen corresponding path program 2 times [2021-05-06 05:11:16,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:16,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043735347] [2021-05-06 05:11:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:16,006 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:16,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410220489] [2021-05-06 05:11:16,007 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 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 05:11:16,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:11:16,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:16,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 05:11:16,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:16,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:16,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:16,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:16,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:16,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:16,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:16,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:16,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:16,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:16,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:16,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 05:11:16,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:16,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043735347] [2021-05-06 05:11:16,146 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:16,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410220489] [2021-05-06 05:11:16,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410220489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:16,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:16,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:16,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554357299] [2021-05-06 05:11:16,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:16,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:16,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:16,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:16,148 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:11:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:16,193 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-05-06 05:11:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:11:16,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-06 05:11:16,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:16,194 INFO L225 Difference]: With dead ends: 68 [2021-05-06 05:11:16,194 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 05:11:16,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 05:11:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-06 05:11:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:11:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-05-06 05:11:16,203 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 48 [2021-05-06 05:11:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:16,204 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-05-06 05:11:16,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:11:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-05-06 05:11:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 05:11:16,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:16,204 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:16,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 05:11:16,409 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:16,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:16,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1330975584, now seen corresponding path program 4 times [2021-05-06 05:11:16,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:16,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601481400] [2021-05-06 05:11:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:16,423 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:16,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780554027] [2021-05-06 05:11:16,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:11:16,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 05:11:16,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:16,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 05:11:16,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:16,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 05:11:16,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:16,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601481400] [2021-05-06 05:11:16,538 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:16,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780554027] [2021-05-06 05:11:16,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780554027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:16,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:16,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:11:16,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352904230] [2021-05-06 05:11:16,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:11:16,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:16,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:11:16,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:16,539 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 05:11:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:16,584 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-05-06 05:11:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:11:16,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-05-06 05:11:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:16,585 INFO L225 Difference]: With dead ends: 65 [2021-05-06 05:11:16,585 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 05:11:16,586 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:11:16,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 05:11:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 05:11:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:11:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-05-06 05:11:16,589 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 48 [2021-05-06 05:11:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:16,590 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-05-06 05:11:16,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 05:11:16,590 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-05-06 05:11:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 05:11:16,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:16,590 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:16,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 05:11:16,809 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash 107606955, now seen corresponding path program 5 times [2021-05-06 05:11:16,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:16,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766761032] [2021-05-06 05:11:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:16,814 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:16,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700078387] [2021-05-06 05:11:16,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:11:16,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 05:11:16,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:16,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 05:11:16,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:16,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 05:11:17,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:17,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766761032] [2021-05-06 05:11:17,001 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:17,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700078387] [2021-05-06 05:11:17,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700078387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:17,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:17,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:11:17,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430010132] [2021-05-06 05:11:17,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:11:17,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:17,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:11:17,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:17,002 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 05:11:17,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:17,090 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-06 05:11:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:11:17,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-06 05:11:17,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:17,092 INFO L225 Difference]: With dead ends: 76 [2021-05-06 05:11:17,092 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 05:11:17,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 05:11:17,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-06 05:11:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 05:11:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-05-06 05:11:17,100 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 53 [2021-05-06 05:11:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:17,100 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-05-06 05:11:17,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 05:11:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-05-06 05:11:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 05:11:17,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:17,101 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:17,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:17,322 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:17,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:17,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1960424256, now seen corresponding path program 6 times [2021-05-06 05:11:17,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:17,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631552579] [2021-05-06 05:11:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:17,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:17,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401653843] [2021-05-06 05:11:17,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:11:17,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 05:11:17,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:17,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 05:11:17,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:17,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 05:11:17,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:17,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631552579] [2021-05-06 05:11:17,669 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:17,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401653843] [2021-05-06 05:11:17,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401653843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:17,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:17,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 05:11:17,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678017723] [2021-05-06 05:11:17,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 05:11:17,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:17,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 05:11:17,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:11:17,671 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 05:11:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:17,792 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-05-06 05:11:17,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:11:17,793 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2021-05-06 05:11:17,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:17,793 INFO L225 Difference]: With dead ends: 80 [2021-05-06 05:11:17,793 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 05:11:17,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:11:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 05:11:17,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 05:11:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 05:11:17,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-05-06 05:11:17,798 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 58 [2021-05-06 05:11:17,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:17,798 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-05-06 05:11:17,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 05:11:17,799 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-05-06 05:11:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 05:11:17,799 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:17,799 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:18,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:18,004 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:18,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:18,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1498675765, now seen corresponding path program 1 times [2021-05-06 05:11:18,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:18,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104414867] [2021-05-06 05:11:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:18,013 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:18,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36061571] [2021-05-06 05:11:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:11:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:18,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:11:18,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:18,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 05:11:18,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:18,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104414867] [2021-05-06 05:11:18,237 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:18,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36061571] [2021-05-06 05:11:18,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36061571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:18,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:18,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:11:18,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345993358] [2021-05-06 05:11:18,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:11:18,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:18,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:11:18,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:18,239 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:11:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:18,293 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-05-06 05:11:18,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:11:18,294 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 05:11:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:18,295 INFO L225 Difference]: With dead ends: 94 [2021-05-06 05:11:18,295 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 05:11:18,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:11:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 05:11:18,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 05:11:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 05:11:18,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-05-06 05:11:18,299 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 71 [2021-05-06 05:11:18,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:18,299 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-05-06 05:11:18,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:11:18,299 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-05-06 05:11:18,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 05:11:18,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:18,300 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:18,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 05:11:18,513 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash -940246227, now seen corresponding path program 7 times [2021-05-06 05:11:18,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:18,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498143042] [2021-05-06 05:11:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:18,518 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:18,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075003394] [2021-05-06 05:11:18,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:11:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:18,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 05:11:18,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:18,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 05:11:18,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:18,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498143042] [2021-05-06 05:11:18,834 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:18,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075003394] [2021-05-06 05:11:18,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075003394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:18,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:18,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:11:18,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573025288] [2021-05-06 05:11:18,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:11:18,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:18,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:11:18,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:18,836 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:11:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:18,962 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2021-05-06 05:11:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:11:18,962 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 05:11:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:18,963 INFO L225 Difference]: With dead ends: 94 [2021-05-06 05:11:18,963 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 05:11:18,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:11:18,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 05:11:18,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-06 05:11:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 05:11:18,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-05-06 05:11:18,968 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 71 [2021-05-06 05:11:18,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:18,968 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-05-06 05:11:18,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:11:18,969 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-05-06 05:11:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 05:11:18,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:18,969 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:19,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 05:11:19,177 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:19,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:19,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1041167106, now seen corresponding path program 8 times [2021-05-06 05:11:19,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:19,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698390320] [2021-05-06 05:11:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:19,182 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:19,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063768518] [2021-05-06 05:11:19,182 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 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 05:11:19,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:11:19,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:19,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 05:11:19,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:19,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 05:11:19,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:19,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698390320] [2021-05-06 05:11:19,363 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:19,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063768518] [2021-05-06 05:11:19,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063768518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:19,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:19,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:11:19,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076153108] [2021-05-06 05:11:19,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:11:19,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:11:19,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:19,365 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 05:11:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:19,446 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-05-06 05:11:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:11:19,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 76 [2021-05-06 05:11:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:19,447 INFO L225 Difference]: With dead ends: 98 [2021-05-06 05:11:19,447 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 05:11:19,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:11:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 05:11:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 05:11:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 05:11:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-05-06 05:11:19,452 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 76 [2021-05-06 05:11:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:19,452 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-05-06 05:11:19,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 05:11:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-05-06 05:11:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 05:11:19,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:19,453 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:19,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 05:11:19,669 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:19,669 INFO L82 PathProgramCache]: Analyzing trace with hash 122742071, now seen corresponding path program 2 times [2021-05-06 05:11:19,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:19,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495365163] [2021-05-06 05:11:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:19,674 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:19,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120802747] [2021-05-06 05:11:19,674 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 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 05:11:19,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:11:19,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:19,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 05:11:19,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:19,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 05:11:19,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:19,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495365163] [2021-05-06 05:11:19,857 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:19,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120802747] [2021-05-06 05:11:19,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120802747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:19,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:19,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:11:19,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210241006] [2021-05-06 05:11:19,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:11:19,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:19,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:11:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:19,858 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 05:11:19,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:19,933 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2021-05-06 05:11:19,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 05:11:19,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 89 [2021-05-06 05:11:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:19,934 INFO L225 Difference]: With dead ends: 112 [2021-05-06 05:11:19,934 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 05:11:19,934 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:11:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 05:11:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 05:11:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 05:11:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-05-06 05:11:19,939 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 89 [2021-05-06 05:11:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:19,939 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-05-06 05:11:19,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 05:11:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-05-06 05:11:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 05:11:19,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:19,940 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:20,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:20,153 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:20,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1978787375, now seen corresponding path program 9 times [2021-05-06 05:11:20,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:20,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503878019] [2021-05-06 05:11:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:20,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:20,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121459711] [2021-05-06 05:11:20,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:11:20,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 05:11:20,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:20,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 05:11:20,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:20,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:20,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:20,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:20,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:20,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:20,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-05-06 05:11:20,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:20,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503878019] [2021-05-06 05:11:20,410 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:20,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121459711] [2021-05-06 05:11:20,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121459711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:20,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:20,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:11:20,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36650898] [2021-05-06 05:11:20,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:11:20,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:20,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:11:20,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:20,412 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 05:11:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:20,592 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-05-06 05:11:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:11:20,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2021-05-06 05:11:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:20,593 INFO L225 Difference]: With dead ends: 100 [2021-05-06 05:11:20,593 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:11:20,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:11:20,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:11:20,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:11:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 05:11:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:11:20,594 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 89 [2021-05-06 05:11:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:20,594 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:11:20,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 05:11:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:11:20,594 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:11:20,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 05:11:20,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 05:11:21,189 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-06 05:11:21,190 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-06 05:11:21,190 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-06 05:11:21,190 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:11:21,190 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 05:11:21,190 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:11:21,190 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:11:21,190 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (= ~counter~0 0) [2021-05-06 05:11:21,190 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 05:11:21,190 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:11:21,190 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:11:21,190 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-06 05:11:21,190 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:11:21,190 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:11:21,190 INFO L198 CegarLoopUtils]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-05-06 05:11:21,190 INFO L194 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:21,191 INFO L194 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:21,191 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 49) no Hoare annotation was computed. [2021-05-06 05:11:21,191 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-06 05:11:21,191 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 49) no Hoare annotation was computed. [2021-05-06 05:11:21,191 INFO L194 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~a~0 8) (* (* main_~a~0 main_~a~0) 4) 4)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:21,191 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:21,191 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 21 49) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:21,191 INFO L198 CegarLoopUtils]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2021-05-06 05:11:21,191 INFO L194 CegarLoopUtils]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:21,191 INFO L194 CegarLoopUtils]: At program point L30-4(lines 30 42) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:21,191 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (and (= main_~t~0 1) (= main_~s~0 1)) (not (= |old(~counter~0)| 0)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)))) [2021-05-06 05:11:21,191 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-06 05:11:21,191 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-06 05:11:21,191 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-06 05:11:21,191 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:11:21,191 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:11:21,192 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-06 05:11:21,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:11:21 BoogieIcfgContainer [2021-05-06 05:11:21,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:11:21,201 INFO L168 Benchmark]: Toolchain (without parser) took 9283.97 ms. Allocated memory was 172.0 MB in the beginning and 260.0 MB in the end (delta: 88.1 MB). Free memory was 136.5 MB in the beginning and 132.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 92.9 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:21,201 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 172.0 MB. Free memory is still 153.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:11:21,201 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.02 ms. Allocated memory is still 172.0 MB. Free memory was 136.3 MB in the beginning and 126.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:21,202 INFO L168 Benchmark]: Boogie Preprocessor took 58.88 ms. Allocated memory is still 172.0 MB. Free memory was 126.7 MB in the beginning and 155.2 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:21,202 INFO L168 Benchmark]: RCFGBuilder took 255.86 ms. Allocated memory is still 172.0 MB. Free memory was 155.2 MB in the beginning and 140.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:21,202 INFO L168 Benchmark]: TraceAbstraction took 8807.79 ms. Allocated memory was 172.0 MB in the beginning and 260.0 MB in the end (delta: 88.1 MB). Free memory was 140.5 MB in the beginning and 132.5 MB in the end (delta: 7.9 MB). Peak memory consumption was 97.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:21,202 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 172.0 MB. Free memory is still 153.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 155.02 ms. Allocated memory is still 172.0 MB. Free memory was 136.3 MB in the beginning and 126.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.88 ms. Allocated memory is still 172.0 MB. Free memory was 126.7 MB in the beginning and 155.2 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 255.86 ms. Allocated memory is still 172.0 MB. Free memory was 155.2 MB in the beginning and 140.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8807.79 ms. Allocated memory was 172.0 MB in the beginning and 260.0 MB in the end (delta: 88.1 MB). Free memory was 140.5 MB in the beginning and 132.5 MB in the end (delta: 7.9 MB). Peak memory consumption was 97.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8384.3ms, OverallIterations: 18, TraceHistogramMax: 14, EmptinessCheckTime: 21.4ms, AutomataDifference: 1600.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 380.1ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 557 SDtfs, 128 SDslu, 1703 SDs, 0 SdLazy, 1083 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 850.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 810 GetRequests, 699 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 716.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=17, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 155.8ms AutomataMinimizationTime, 18 MinimizatonAttempts, 9 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 63 PreInvPairs, 100 NumberOfFragments, 240 HoareAnnotationTreeSize, 63 FomulaSimplifications, 970 FormulaSimplificationTreeSizeReduction, 97.2ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 645 FormulaSimplificationTreeSizeReductionInter, 268.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 126.8ms SsaConstructionTime, 482.5ms SatisfiabilityAnalysisTime, 2166.4ms InterpolantComputationTime, 812 NumberOfCodeBlocks, 741 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 794 ConstructedInterpolants, 0 QuantifiedInterpolants, 2528 SizeOfPredicates, 36 NumberOfNonLiveVariables, 2665 ConjunctsInSsa, 221 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 1501/2065 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (s * 4 == t * t + t * 2 + 1 && a * 2 + 1 == t) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...