/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 17:41:15,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:41:15,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:41:15,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:41:15,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:41:15,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:41:15,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:41:15,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:41:15,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:41:15,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:41:15,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:41:15,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:41:15,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:41:15,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:41:15,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:41:15,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:41:15,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:41:15,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:41:15,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:41:15,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:41:15,633 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 [2021-02-19 17:41:15,679 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:41:15,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:41:15,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:41:15,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:41:15,685 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:41:15,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:41:15,686 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:41:15,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:41:15,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:41:15,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:41:15,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:41:15,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:41:15,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:41:15,688 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:41:15,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:41:15,688 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:41:15,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:41:15,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:41:15,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:41:15,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:41:15,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:41:15,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:41:15,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:41:15,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:41:15,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:41:15,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:41:15,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:41:15,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:41:15,692 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:41:16,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:41:16,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:41:16,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:41:16,188 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:41:16,188 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:41:16,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2021-02-19 17:41:16,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d5b01eb4/7a67cdc84a9e432b833a031e57f98f80/FLAG023ecf7d0 [2021-02-19 17:41:17,070 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:41:17,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c [2021-02-19 17:41:17,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d5b01eb4/7a67cdc84a9e432b833a031e57f98f80/FLAG023ecf7d0 [2021-02-19 17:41:17,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d5b01eb4/7a67cdc84a9e432b833a031e57f98f80 [2021-02-19 17:41:17,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:41:17,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:41:17,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:41:17,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:41:17,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:41:17,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:41:17" (1/1) ... [2021-02-19 17:41:17,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bfa402b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:17, skipping insertion in model container [2021-02-19 17:41:17,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:41:17" (1/1) ... [2021-02-19 17:41:17,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:41:17,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:41:17,736 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c[2207,2220] [2021-02-19 17:41:17,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:41:17,772 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:41:17,829 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c[2207,2220] [2021-02-19 17:41:17,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:41:17,863 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:41:17,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:17 WrapperNode [2021-02-19 17:41:17,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:41:17,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:41:17,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:41:17,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:41:17,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:17" (1/1) ... [2021-02-19 17:41:17,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:17" (1/1) ... [2021-02-19 17:41:17,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:17" (1/1) ... [2021-02-19 17:41:17,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:17" (1/1) ... [2021-02-19 17:41:17,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:17" (1/1) ... [2021-02-19 17:41:17,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:17" (1/1) ... [2021-02-19 17:41:17,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:17" (1/1) ... [2021-02-19 17:41:17,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:41:17,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:41:17,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:41:17,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:41:17,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:17" (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 [2021-02-19 17:41:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:41:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:41:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:41:18,091 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:41:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:41:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:41:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:41:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:41:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-19 17:41:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:41:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:41:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:41:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:41:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:41:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:41:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:41:18,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:41:18,602 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-19 17:41:18,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:41:18 BoogieIcfgContainer [2021-02-19 17:41:18,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:41:18,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:41:18,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:41:18,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:41:18,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:41:17" (1/3) ... [2021-02-19 17:41:18,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba46d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:41:18, skipping insertion in model container [2021-02-19 17:41:18,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:17" (2/3) ... [2021-02-19 17:41:18,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba46d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:41:18, skipping insertion in model container [2021-02-19 17:41:18,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:41:18" (3/3) ... [2021-02-19 17:41:18,618 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2021-02-19 17:41:18,631 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:41:18,674 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:41:18,726 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:41:18,818 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:41:18,819 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:41:18,819 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:41:18,819 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:41:18,820 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:41:18,820 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:41:18,821 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:41:18,821 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:41:18,855 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-02-19 17:41:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:41:18,866 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:18,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:18,869 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:18,883 INFO L82 PathProgramCache]: Analyzing trace with hash -663266717, now seen corresponding path program 1 times [2021-02-19 17:41:18,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:18,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709625594] [2021-02-19 17:41:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:19,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:19,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:19,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:19,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:19,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:19,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:19,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:19,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:19,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:19,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709625594] [2021-02-19 17:41:19,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:19,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:19,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897111656] [2021-02-19 17:41:19,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:19,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:19,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:19,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:19,400 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2021-02-19 17:41:19,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:19,595 INFO L93 Difference]: Finished difference Result 58 states and 91 transitions. [2021-02-19 17:41:19,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:19,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-02-19 17:41:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:19,611 INFO L225 Difference]: With dead ends: 58 [2021-02-19 17:41:19,612 INFO L226 Difference]: Without dead ends: 43 [2021-02-19 17:41:19,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-19 17:41:19,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2021-02-19 17:41:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-19 17:41:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 50 transitions. [2021-02-19 17:41:19,672 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 50 transitions. Word has length 16 [2021-02-19 17:41:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:19,673 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 50 transitions. [2021-02-19 17:41:19,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:19,673 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 50 transitions. [2021-02-19 17:41:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:41:19,675 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:19,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:19,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:41:19,676 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:19,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1472613343, now seen corresponding path program 1 times [2021-02-19 17:41:19,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:19,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673050909] [2021-02-19 17:41:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:19,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:19,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:19,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:19,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:19,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:19,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:19,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:19,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:19,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:19,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673050909] [2021-02-19 17:41:19,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:19,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:19,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954235804] [2021-02-19 17:41:19,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:19,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:19,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:19,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:19,798 INFO L87 Difference]: Start difference. First operand 31 states and 50 transitions. Second operand 4 states. [2021-02-19 17:41:19,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:19,957 INFO L93 Difference]: Finished difference Result 68 states and 113 transitions. [2021-02-19 17:41:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:19,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-02-19 17:41:19,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:19,962 INFO L225 Difference]: With dead ends: 68 [2021-02-19 17:41:19,962 INFO L226 Difference]: Without dead ends: 43 [2021-02-19 17:41:19,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:19,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-19 17:41:19,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-02-19 17:41:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-19 17:41:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 66 transitions. [2021-02-19 17:41:19,988 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 66 transitions. Word has length 16 [2021-02-19 17:41:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:19,989 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 66 transitions. [2021-02-19 17:41:19,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 66 transitions. [2021-02-19 17:41:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:41:19,990 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:19,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:19,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:41:19,992 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:19,996 INFO L82 PathProgramCache]: Analyzing trace with hash 913783256, now seen corresponding path program 1 times [2021-02-19 17:41:19,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:19,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510154260] [2021-02-19 17:41:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:20,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:20,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:20,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:20,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510154260] [2021-02-19 17:41:20,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:20,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:20,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205940604] [2021-02-19 17:41:20,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:20,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:20,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:20,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:20,134 INFO L87 Difference]: Start difference. First operand 41 states and 66 transitions. Second operand 4 states. [2021-02-19 17:41:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:20,320 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2021-02-19 17:41:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:20,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-19 17:41:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:20,325 INFO L225 Difference]: With dead ends: 64 [2021-02-19 17:41:20,327 INFO L226 Difference]: Without dead ends: 46 [2021-02-19 17:41:20,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:20,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-19 17:41:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-02-19 17:41:20,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-19 17:41:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 68 transitions. [2021-02-19 17:41:20,342 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 68 transitions. Word has length 17 [2021-02-19 17:41:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:20,342 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 68 transitions. [2021-02-19 17:41:20,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:20,343 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 68 transitions. [2021-02-19 17:41:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:41:20,344 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:20,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:20,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:41:20,345 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:20,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:20,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1593841626, now seen corresponding path program 1 times [2021-02-19 17:41:20,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:20,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968677905] [2021-02-19 17:41:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:20,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:20,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:20,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:20,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968677905] [2021-02-19 17:41:20,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:20,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:20,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977222027] [2021-02-19 17:41:20,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:20,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:20,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:20,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:20,457 INFO L87 Difference]: Start difference. First operand 44 states and 68 transitions. Second operand 4 states. [2021-02-19 17:41:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:20,623 INFO L93 Difference]: Finished difference Result 112 states and 180 transitions. [2021-02-19 17:41:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:20,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-19 17:41:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:20,629 INFO L225 Difference]: With dead ends: 112 [2021-02-19 17:41:20,629 INFO L226 Difference]: Without dead ends: 77 [2021-02-19 17:41:20,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:20,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-19 17:41:20,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-02-19 17:41:20,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-02-19 17:41:20,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 117 transitions. [2021-02-19 17:41:20,655 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 117 transitions. Word has length 17 [2021-02-19 17:41:20,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:20,656 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 117 transitions. [2021-02-19 17:41:20,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 117 transitions. [2021-02-19 17:41:20,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:41:20,659 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:20,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:20,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:41:20,660 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:20,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:20,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1891779044, now seen corresponding path program 1 times [2021-02-19 17:41:20,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:20,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579857965] [2021-02-19 17:41:20,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:20,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:20,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:20,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:20,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579857965] [2021-02-19 17:41:20,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:20,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:20,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591833615] [2021-02-19 17:41:20,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:20,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:20,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:20,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:20,735 INFO L87 Difference]: Start difference. First operand 75 states and 117 transitions. Second operand 4 states. [2021-02-19 17:41:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:20,844 INFO L93 Difference]: Finished difference Result 95 states and 147 transitions. [2021-02-19 17:41:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:20,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-19 17:41:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:20,855 INFO L225 Difference]: With dead ends: 95 [2021-02-19 17:41:20,855 INFO L226 Difference]: Without dead ends: 93 [2021-02-19 17:41:20,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-19 17:41:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2021-02-19 17:41:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-02-19 17:41:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 115 transitions. [2021-02-19 17:41:20,885 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 115 transitions. Word has length 17 [2021-02-19 17:41:20,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:20,886 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 115 transitions. [2021-02-19 17:41:20,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 115 transitions. [2021-02-19 17:41:20,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:41:20,887 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:20,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:20,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:41:20,888 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:20,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:20,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2130301802, now seen corresponding path program 1 times [2021-02-19 17:41:20,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:20,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17710177] [2021-02-19 17:41:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:20,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:20,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:20,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:20,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17710177] [2021-02-19 17:41:20,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:20,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:20,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479825405] [2021-02-19 17:41:20,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:20,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:20,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:20,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:20,959 INFO L87 Difference]: Start difference. First operand 75 states and 115 transitions. Second operand 4 states. [2021-02-19 17:41:21,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:21,072 INFO L93 Difference]: Finished difference Result 131 states and 203 transitions. [2021-02-19 17:41:21,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:21,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-19 17:41:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:21,075 INFO L225 Difference]: With dead ends: 131 [2021-02-19 17:41:21,075 INFO L226 Difference]: Without dead ends: 129 [2021-02-19 17:41:21,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:21,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-02-19 17:41:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2021-02-19 17:41:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-02-19 17:41:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 157 transitions. [2021-02-19 17:41:21,088 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 157 transitions. Word has length 18 [2021-02-19 17:41:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:21,089 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 157 transitions. [2021-02-19 17:41:21,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 157 transitions. [2021-02-19 17:41:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:41:21,090 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:21,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:21,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 17:41:21,091 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:21,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:21,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1355318868, now seen corresponding path program 1 times [2021-02-19 17:41:21,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:21,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746796004] [2021-02-19 17:41:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:21,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:21,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746796004] [2021-02-19 17:41:21,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:21,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:21,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115390756] [2021-02-19 17:41:21,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:21,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:21,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:21,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:21,157 INFO L87 Difference]: Start difference. First operand 103 states and 157 transitions. Second operand 4 states. [2021-02-19 17:41:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:21,257 INFO L93 Difference]: Finished difference Result 231 states and 355 transitions. [2021-02-19 17:41:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:21,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-19 17:41:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:21,259 INFO L225 Difference]: With dead ends: 231 [2021-02-19 17:41:21,259 INFO L226 Difference]: Without dead ends: 137 [2021-02-19 17:41:21,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:21,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-19 17:41:21,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-02-19 17:41:21,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-02-19 17:41:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 199 transitions. [2021-02-19 17:41:21,274 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 199 transitions. Word has length 18 [2021-02-19 17:41:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:21,274 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 199 transitions. [2021-02-19 17:41:21,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 199 transitions. [2021-02-19 17:41:21,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:41:21,276 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:21,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:21,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 17:41:21,277 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:21,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:21,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1614630737, now seen corresponding path program 1 times [2021-02-19 17:41:21,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:21,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684954950] [2021-02-19 17:41:21,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:21,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:21,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684954950] [2021-02-19 17:41:21,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:21,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:21,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644434713] [2021-02-19 17:41:21,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:21,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:21,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:21,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:21,362 INFO L87 Difference]: Start difference. First operand 135 states and 199 transitions. Second operand 4 states. [2021-02-19 17:41:21,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:21,455 INFO L93 Difference]: Finished difference Result 205 states and 301 transitions. [2021-02-19 17:41:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:21,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-19 17:41:21,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:21,456 INFO L225 Difference]: With dead ends: 205 [2021-02-19 17:41:21,457 INFO L226 Difference]: Without dead ends: 143 [2021-02-19 17:41:21,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:21,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-02-19 17:41:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-02-19 17:41:21,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-02-19 17:41:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 203 transitions. [2021-02-19 17:41:21,483 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 203 transitions. Word has length 19 [2021-02-19 17:41:21,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:21,483 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 203 transitions. [2021-02-19 17:41:21,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 203 transitions. [2021-02-19 17:41:21,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:41:21,485 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:21,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:21,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 17:41:21,485 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:21,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:21,486 INFO L82 PathProgramCache]: Analyzing trace with hash -934572367, now seen corresponding path program 1 times [2021-02-19 17:41:21,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:21,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929740605] [2021-02-19 17:41:21,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:21,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:21,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929740605] [2021-02-19 17:41:21,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:21,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:21,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291085791] [2021-02-19 17:41:21,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:21,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:21,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:21,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:21,547 INFO L87 Difference]: Start difference. First operand 141 states and 203 transitions. Second operand 4 states. [2021-02-19 17:41:21,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:21,665 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2021-02-19 17:41:21,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:21,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-19 17:41:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:21,668 INFO L225 Difference]: With dead ends: 237 [2021-02-19 17:41:21,668 INFO L226 Difference]: Without dead ends: 235 [2021-02-19 17:41:21,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-02-19 17:41:21,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 201. [2021-02-19 17:41:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-02-19 17:41:21,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 283 transitions. [2021-02-19 17:41:21,687 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 283 transitions. Word has length 19 [2021-02-19 17:41:21,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:21,687 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 283 transitions. [2021-02-19 17:41:21,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:21,688 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 283 transitions. [2021-02-19 17:41:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:41:21,695 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:21,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:21,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 17:41:21,696 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:21,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:21,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1743918993, now seen corresponding path program 1 times [2021-02-19 17:41:21,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:21,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482286166] [2021-02-19 17:41:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:21,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:21,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482286166] [2021-02-19 17:41:21,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:21,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:21,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750154677] [2021-02-19 17:41:21,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:21,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:21,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:21,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:21,800 INFO L87 Difference]: Start difference. First operand 201 states and 283 transitions. Second operand 4 states. [2021-02-19 17:41:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:21,902 INFO L93 Difference]: Finished difference Result 445 states and 621 transitions. [2021-02-19 17:41:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:21,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-19 17:41:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:21,904 INFO L225 Difference]: With dead ends: 445 [2021-02-19 17:41:21,904 INFO L226 Difference]: Without dead ends: 259 [2021-02-19 17:41:21,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-02-19 17:41:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2021-02-19 17:41:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2021-02-19 17:41:21,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 343 transitions. [2021-02-19 17:41:21,924 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 343 transitions. Word has length 19 [2021-02-19 17:41:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:21,927 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 343 transitions. [2021-02-19 17:41:21,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:21,927 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 343 transitions. [2021-02-19 17:41:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:41:21,929 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:21,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:21,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 17:41:21,929 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:21,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1093243721, now seen corresponding path program 1 times [2021-02-19 17:41:21,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:21,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503496443] [2021-02-19 17:41:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:21,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:22,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503496443] [2021-02-19 17:41:22,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:22,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:22,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108457391] [2021-02-19 17:41:22,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:22,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:22,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:22,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:22,007 INFO L87 Difference]: Start difference. First operand 257 states and 343 transitions. Second operand 4 states. [2021-02-19 17:41:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:22,118 INFO L93 Difference]: Finished difference Result 385 states and 509 transitions. [2021-02-19 17:41:22,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:22,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-19 17:41:22,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:22,121 INFO L225 Difference]: With dead ends: 385 [2021-02-19 17:41:22,121 INFO L226 Difference]: Without dead ends: 267 [2021-02-19 17:41:22,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-02-19 17:41:22,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2021-02-19 17:41:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2021-02-19 17:41:22,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 343 transitions. [2021-02-19 17:41:22,137 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 343 transitions. Word has length 20 [2021-02-19 17:41:22,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:22,137 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 343 transitions. [2021-02-19 17:41:22,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 343 transitions. [2021-02-19 17:41:22,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:41:22,138 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:22,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:22,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 17:41:22,139 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:22,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:22,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1773302091, now seen corresponding path program 1 times [2021-02-19 17:41:22,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:22,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57716825] [2021-02-19 17:41:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:22,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:22,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57716825] [2021-02-19 17:41:22,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:22,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:22,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146708674] [2021-02-19 17:41:22,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:22,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:22,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:22,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:22,199 INFO L87 Difference]: Start difference. First operand 265 states and 343 transitions. Second operand 4 states. [2021-02-19 17:41:22,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:22,298 INFO L93 Difference]: Finished difference Result 427 states and 544 transitions. [2021-02-19 17:41:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:22,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-19 17:41:22,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:22,301 INFO L225 Difference]: With dead ends: 427 [2021-02-19 17:41:22,301 INFO L226 Difference]: Without dead ends: 425 [2021-02-19 17:41:22,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-02-19 17:41:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 393. [2021-02-19 17:41:22,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2021-02-19 17:41:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 495 transitions. [2021-02-19 17:41:22,322 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 495 transitions. Word has length 20 [2021-02-19 17:41:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:22,323 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 495 transitions. [2021-02-19 17:41:22,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 495 transitions. [2021-02-19 17:41:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:41:22,324 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:22,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:22,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 17:41:22,324 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:22,325 INFO L82 PathProgramCache]: Analyzing trace with hash 963955465, now seen corresponding path program 1 times [2021-02-19 17:41:22,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:22,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481281270] [2021-02-19 17:41:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:22,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:22,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481281270] [2021-02-19 17:41:22,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:22,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:22,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236305951] [2021-02-19 17:41:22,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:22,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:22,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:22,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:22,397 INFO L87 Difference]: Start difference. First operand 393 states and 495 transitions. Second operand 4 states. [2021-02-19 17:41:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:22,498 INFO L93 Difference]: Finished difference Result 857 states and 1055 transitions. [2021-02-19 17:41:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:22,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-19 17:41:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:22,500 INFO L225 Difference]: With dead ends: 857 [2021-02-19 17:41:22,500 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 17:41:22,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 17:41:22,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 17:41:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-19 17:41:22,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 17:41:22,503 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-02-19 17:41:22,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:22,503 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 17:41:22,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:22,503 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 17:41:22,503 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 17:41:22,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-19 17:41:22,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-19 17:41:22,902 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 32 [2021-02-19 17:41:22,945 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-19 17:41:22,946 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-19 17:41:22,946 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-19 17:41:22,946 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:41:22,946 INFO L185 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)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-19 17:41:22,946 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:41:22,947 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:41:22,947 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-19 17:41:22,947 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-19 17:41:22,947 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:41:22,947 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 95) no Hoare annotation was computed. [2021-02-19 17:41:22,947 INFO L192 CegarLoopUtils]: At program point L85-1(lines 26 90) the Hoare annotation is: true [2021-02-19 17:41:22,947 INFO L189 CegarLoopUtils]: For program point L81(line 81) no Hoare annotation was computed. [2021-02-19 17:41:22,947 INFO L189 CegarLoopUtils]: For program point L65-1(lines 26 90) no Hoare annotation was computed. [2021-02-19 17:41:22,948 INFO L189 CegarLoopUtils]: For program point L28(lines 28 30) no Hoare annotation was computed. [2021-02-19 17:41:22,948 INFO L189 CegarLoopUtils]: For program point L86(line 86) no Hoare annotation was computed. [2021-02-19 17:41:22,948 INFO L185 CegarLoopUtils]: At program point L86-1(lines 7 95) the Hoare annotation is: false [2021-02-19 17:41:22,948 INFO L189 CegarLoopUtils]: For program point L70-1(lines 26 90) no Hoare annotation was computed. [2021-02-19 17:41:22,948 INFO L189 CegarLoopUtils]: For program point L66(line 66) no Hoare annotation was computed. [2021-02-19 17:41:22,948 INFO L192 CegarLoopUtils]: At program point L91(lines 7 95) the Hoare annotation is: true [2021-02-19 17:41:22,948 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 95) no Hoare annotation was computed. [2021-02-19 17:41:22,948 INFO L189 CegarLoopUtils]: For program point L75-1(lines 26 90) no Hoare annotation was computed. [2021-02-19 17:41:22,948 INFO L189 CegarLoopUtils]: For program point L71(line 71) no Hoare annotation was computed. [2021-02-19 17:41:22,949 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 93) no Hoare annotation was computed. [2021-02-19 17:41:22,949 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 95) the Hoare annotation is: true [2021-02-19 17:41:22,949 INFO L189 CegarLoopUtils]: For program point L59-1(lines 26 90) no Hoare annotation was computed. [2021-02-19 17:41:22,949 INFO L189 CegarLoopUtils]: For program point L55-1(lines 26 90) no Hoare annotation was computed. [2021-02-19 17:41:22,949 INFO L189 CegarLoopUtils]: For program point L51-1(lines 26 90) no Hoare annotation was computed. [2021-02-19 17:41:22,949 INFO L189 CegarLoopUtils]: For program point L80-1(lines 26 90) no Hoare annotation was computed. [2021-02-19 17:41:22,949 INFO L189 CegarLoopUtils]: For program point L47-1(lines 26 90) no Hoare annotation was computed. [2021-02-19 17:41:22,949 INFO L189 CegarLoopUtils]: For program point L76(line 76) no Hoare annotation was computed. [2021-02-19 17:41:22,950 INFO L189 CegarLoopUtils]: For program point L43(lines 43 45) no Hoare annotation was computed. [2021-02-19 17:41:22,950 INFO L189 CegarLoopUtils]: For program point L43-2(lines 26 90) no Hoare annotation was computed. [2021-02-19 17:41:22,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:41:22 BoogieIcfgContainer [2021-02-19 17:41:22,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:41:22,964 INFO L168 Benchmark]: Toolchain (without parser) took 5580.94 ms. Allocated memory was 169.9 MB in the beginning and 223.3 MB in the end (delta: 53.5 MB). Free memory was 146.0 MB in the beginning and 94.4 MB in the end (delta: 51.6 MB). Peak memory consumption was 106.2 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:22,965 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 169.9 MB. Free memory is still 140.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:41:22,965 INFO L168 Benchmark]: CACSL2BoogieTranslator took 465.07 ms. Allocated memory is still 169.9 MB. Free memory was 144.9 MB in the beginning and 135.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:22,966 INFO L168 Benchmark]: Boogie Preprocessor took 90.35 ms. Allocated memory is still 169.9 MB. Free memory was 135.4 MB in the beginning and 133.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:22,966 INFO L168 Benchmark]: RCFGBuilder took 647.12 ms. Allocated memory is still 169.9 MB. Free memory was 133.6 MB in the beginning and 117.5 MB in the end (delta: 16.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:22,967 INFO L168 Benchmark]: TraceAbstraction took 4354.78 ms. Allocated memory was 169.9 MB in the beginning and 223.3 MB in the end (delta: 53.5 MB). Free memory was 117.1 MB in the beginning and 94.4 MB in the end (delta: 22.7 MB). Peak memory consumption was 76.9 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:22,969 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 169.9 MB. Free memory is still 140.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 465.07 ms. Allocated memory is still 169.9 MB. Free memory was 144.9 MB in the beginning and 135.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 90.35 ms. Allocated memory is still 169.9 MB. Free memory was 135.4 MB in the beginning and 133.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 647.12 ms. Allocated memory is still 169.9 MB. Free memory was 133.6 MB in the beginning and 117.5 MB in the end (delta: 16.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4354.78 ms. Allocated memory was 169.9 MB in the beginning and 223.3 MB in the end (delta: 53.5 MB). Free memory was 117.1 MB in the beginning and 94.4 MB in the end (delta: 22.7 MB). Peak memory consumption was 76.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 93]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 13, TraceHistogramMax: 1, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 615 SDtfs, 831 SDslu, 82 SDs, 0 SdLazy, 453 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=393occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 136 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 52502 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 236 NumberOfCodeBlocks, 236 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 223 ConstructedInterpolants, 0 QuantifiedInterpolants, 13206 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...