/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-36cd7be [2021-02-23 13:34:18,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:34:18,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:34:18,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:34:18,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:34:18,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:34:18,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:34:18,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:34:18,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:34:18,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:34:18,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:34:18,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:34:18,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:34:18,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:34:18,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:34:18,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:34:19,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:34:19,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:34:19,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:34:19,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:34:19,025 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 [2021-02-23 13:34:19,077 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:34:19,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:34:19,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:34:19,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:34:19,082 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:34:19,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:34:19,083 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:34:19,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:34:19,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:34:19,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:34:19,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:34:19,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:34:19,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:34:19,085 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:34:19,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:34:19,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:34:19,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:34:19,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:34:19,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:34:19,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:34:19,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:34:19,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:34:19,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:34:19,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:34:19,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:34:19,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:34:19,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:34:19,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:34:19,089 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:34:19,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:34:19,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:34:19,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:34:19,510 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:34:19,511 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:34:19,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2021-02-23 13:34:19,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/420a5250d/0fd20926d1664114b57b43edf4127c92/FLAG7e9d4d907 [2021-02-23 13:34:20,236 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:34:20,237 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c [2021-02-23 13:34:20,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/420a5250d/0fd20926d1664114b57b43edf4127c92/FLAG7e9d4d907 [2021-02-23 13:34:20,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/420a5250d/0fd20926d1664114b57b43edf4127c92 [2021-02-23 13:34:20,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:34:20,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:34:20,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:34:20,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:34:20,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:34:20,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:34:20" (1/1) ... [2021-02-23 13:34:20,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4571bde3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:20, skipping insertion in model container [2021-02-23 13:34:20,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:34:20" (1/1) ... [2021-02-23 13:34:20,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:34:20,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:34:20,846 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] [2021-02-23 13:34:20,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:34:20,861 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:34:20,884 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] [2021-02-23 13:34:20,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:34:20,902 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:34:20,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:20 WrapperNode [2021-02-23 13:34:20,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:34:20,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:34:20,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:34:20,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:34:20,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:20" (1/1) ... [2021-02-23 13:34:20,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:20" (1/1) ... [2021-02-23 13:34:20,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:20" (1/1) ... [2021-02-23 13:34:20,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:20" (1/1) ... [2021-02-23 13:34:20,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:20" (1/1) ... [2021-02-23 13:34:20,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:20" (1/1) ... [2021-02-23 13:34:20,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:20" (1/1) ... [2021-02-23 13:34:20,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:34:20,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:34:20,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:34:20,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:34:20,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:20" (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 [2021-02-23 13:34:21,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:34:21,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:34:21,111 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:34:21,112 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:34:21,112 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:34:21,112 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:34:21,112 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:34:21,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:34:21,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:34:21,114 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:34:21,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:34:21,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:34:21,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:34:21,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:34:21,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:34:21,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:34:21,580 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:34:21,580 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 13:34:21,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:34:21 BoogieIcfgContainer [2021-02-23 13:34:21,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:34:21,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:34:21,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:34:21,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:34:21,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:34:20" (1/3) ... [2021-02-23 13:34:21,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2e7331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:34:21, skipping insertion in model container [2021-02-23 13:34:21,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:20" (2/3) ... [2021-02-23 13:34:21,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2e7331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:34:21, skipping insertion in model container [2021-02-23 13:34:21,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:34:21" (3/3) ... [2021-02-23 13:34:21,594 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2021-02-23 13:34:21,603 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:34:21,614 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:34:21,657 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:34:21,757 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:34:21,758 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:34:21,758 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:34:21,758 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:34:21,758 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:34:21,758 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:34:21,758 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:34:21,759 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:34:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-02-23 13:34:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-23 13:34:21,794 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:21,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:21,796 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:21,805 INFO L82 PathProgramCache]: Analyzing trace with hash -663266717, now seen corresponding path program 1 times [2021-02-23 13:34:21,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:21,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020942691] [2021-02-23 13:34:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:22,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:22,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:22,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:22,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020942691] [2021-02-23 13:34:22,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:22,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:22,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910930442] [2021-02-23 13:34:22,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:22,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:22,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:22,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:22,168 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2021-02-23 13:34:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:22,478 INFO L93 Difference]: Finished difference Result 58 states and 91 transitions. [2021-02-23 13:34:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:22,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-02-23 13:34:22,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:22,490 INFO L225 Difference]: With dead ends: 58 [2021-02-23 13:34:22,490 INFO L226 Difference]: Without dead ends: 43 [2021-02-23 13:34:22,494 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 [2021-02-23 13:34:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-23 13:34:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2021-02-23 13:34:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-23 13:34:22,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 50 transitions. [2021-02-23 13:34:22,539 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 50 transitions. Word has length 16 [2021-02-23 13:34:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:22,539 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 50 transitions. [2021-02-23 13:34:22,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 50 transitions. [2021-02-23 13:34:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-23 13:34:22,541 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:22,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:22,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:34:22,541 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:22,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1472613343, now seen corresponding path program 1 times [2021-02-23 13:34:22,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:22,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503980727] [2021-02-23 13:34:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:22,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:22,593 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:22,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:22,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503980727] [2021-02-23 13:34:22,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:22,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:22,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123383262] [2021-02-23 13:34:22,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:22,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:22,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:22,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:22,643 INFO L87 Difference]: Start difference. First operand 31 states and 50 transitions. Second operand 4 states. [2021-02-23 13:34:22,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:22,784 INFO L93 Difference]: Finished difference Result 68 states and 113 transitions. [2021-02-23 13:34:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:22,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-02-23 13:34:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:22,786 INFO L225 Difference]: With dead ends: 68 [2021-02-23 13:34:22,787 INFO L226 Difference]: Without dead ends: 43 [2021-02-23 13:34:22,788 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 [2021-02-23 13:34:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-23 13:34:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-02-23 13:34:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-23 13:34:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 66 transitions. [2021-02-23 13:34:22,799 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 66 transitions. Word has length 16 [2021-02-23 13:34:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:22,800 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 66 transitions. [2021-02-23 13:34:22,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 66 transitions. [2021-02-23 13:34:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-23 13:34:22,801 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:22,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:22,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:34:22,802 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:22,803 INFO L82 PathProgramCache]: Analyzing trace with hash 913783256, now seen corresponding path program 1 times [2021-02-23 13:34:22,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:22,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838036578] [2021-02-23 13:34:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:22,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:22,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:22,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:22,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838036578] [2021-02-23 13:34:22,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:22,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:22,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401882977] [2021-02-23 13:34:22,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:22,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:22,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:22,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:22,894 INFO L87 Difference]: Start difference. First operand 41 states and 66 transitions. Second operand 4 states. [2021-02-23 13:34:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:23,025 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2021-02-23 13:34:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:23,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-23 13:34:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:23,028 INFO L225 Difference]: With dead ends: 64 [2021-02-23 13:34:23,028 INFO L226 Difference]: Without dead ends: 46 [2021-02-23 13:34:23,029 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 [2021-02-23 13:34:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-23 13:34:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-02-23 13:34:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-23 13:34:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 68 transitions. [2021-02-23 13:34:23,041 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 68 transitions. Word has length 17 [2021-02-23 13:34:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:23,042 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 68 transitions. [2021-02-23 13:34:23,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 68 transitions. [2021-02-23 13:34:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-23 13:34:23,043 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:23,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:23,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 13:34:23,044 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:23,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:23,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1593841626, now seen corresponding path program 1 times [2021-02-23 13:34:23,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:23,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192580154] [2021-02-23 13:34:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:23,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:23,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192580154] [2021-02-23 13:34:23,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:23,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:23,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026727418] [2021-02-23 13:34:23,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:23,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:23,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:23,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:23,196 INFO L87 Difference]: Start difference. First operand 44 states and 68 transitions. Second operand 4 states. [2021-02-23 13:34:23,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:23,431 INFO L93 Difference]: Finished difference Result 112 states and 180 transitions. [2021-02-23 13:34:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:23,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-23 13:34:23,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:23,441 INFO L225 Difference]: With dead ends: 112 [2021-02-23 13:34:23,441 INFO L226 Difference]: Without dead ends: 77 [2021-02-23 13:34:23,442 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 [2021-02-23 13:34:23,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-23 13:34:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-02-23 13:34:23,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-02-23 13:34:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 117 transitions. [2021-02-23 13:34:23,475 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 117 transitions. Word has length 17 [2021-02-23 13:34:23,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:23,475 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 117 transitions. [2021-02-23 13:34:23,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:23,476 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 117 transitions. [2021-02-23 13:34:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-23 13:34:23,478 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:23,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:23,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 13:34:23,479 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:23,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1891779044, now seen corresponding path program 1 times [2021-02-23 13:34:23,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:23,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599194368] [2021-02-23 13:34:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:23,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:23,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599194368] [2021-02-23 13:34:23,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:23,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:23,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978882607] [2021-02-23 13:34:23,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:23,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:23,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:23,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:23,557 INFO L87 Difference]: Start difference. First operand 75 states and 117 transitions. Second operand 4 states. [2021-02-23 13:34:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:23,678 INFO L93 Difference]: Finished difference Result 95 states and 147 transitions. [2021-02-23 13:34:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:23,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-23 13:34:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:23,681 INFO L225 Difference]: With dead ends: 95 [2021-02-23 13:34:23,681 INFO L226 Difference]: Without dead ends: 93 [2021-02-23 13:34:23,681 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 [2021-02-23 13:34:23,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-23 13:34:23,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2021-02-23 13:34:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-02-23 13:34:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 115 transitions. [2021-02-23 13:34:23,695 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 115 transitions. Word has length 17 [2021-02-23 13:34:23,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:23,695 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 115 transitions. [2021-02-23 13:34:23,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:23,695 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 115 transitions. [2021-02-23 13:34:23,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-23 13:34:23,696 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:23,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:23,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 13:34:23,697 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:23,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:23,698 INFO L82 PathProgramCache]: Analyzing trace with hash -2130301802, now seen corresponding path program 1 times [2021-02-23 13:34:23,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:23,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287416653] [2021-02-23 13:34:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:23,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:23,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287416653] [2021-02-23 13:34:23,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:23,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:23,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42509997] [2021-02-23 13:34:23,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:23,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:23,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:23,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:23,771 INFO L87 Difference]: Start difference. First operand 75 states and 115 transitions. Second operand 4 states. [2021-02-23 13:34:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:23,899 INFO L93 Difference]: Finished difference Result 131 states and 203 transitions. [2021-02-23 13:34:23,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:23,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-23 13:34:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:23,902 INFO L225 Difference]: With dead ends: 131 [2021-02-23 13:34:23,902 INFO L226 Difference]: Without dead ends: 129 [2021-02-23 13:34:23,902 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 [2021-02-23 13:34:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-02-23 13:34:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2021-02-23 13:34:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-02-23 13:34:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 157 transitions. [2021-02-23 13:34:23,917 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 157 transitions. Word has length 18 [2021-02-23 13:34:23,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:23,918 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 157 transitions. [2021-02-23 13:34:23,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 157 transitions. [2021-02-23 13:34:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-23 13:34:23,920 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:23,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:23,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 13:34:23,920 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:23,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1355318868, now seen corresponding path program 1 times [2021-02-23 13:34:23,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:23,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931394118] [2021-02-23 13:34:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:23,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:23,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931394118] [2021-02-23 13:34:23,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:23,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:23,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274039136] [2021-02-23 13:34:23,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:23,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:23,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:23,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:23,983 INFO L87 Difference]: Start difference. First operand 103 states and 157 transitions. Second operand 4 states. [2021-02-23 13:34:24,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,098 INFO L93 Difference]: Finished difference Result 231 states and 355 transitions. [2021-02-23 13:34:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-23 13:34:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,100 INFO L225 Difference]: With dead ends: 231 [2021-02-23 13:34:24,101 INFO L226 Difference]: Without dead ends: 137 [2021-02-23 13:34:24,102 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 [2021-02-23 13:34:24,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-23 13:34:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-02-23 13:34:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-02-23 13:34:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 199 transitions. [2021-02-23 13:34:24,119 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 199 transitions. Word has length 18 [2021-02-23 13:34:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,119 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 199 transitions. [2021-02-23 13:34:24,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 199 transitions. [2021-02-23 13:34:24,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 13:34:24,121 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:24,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 13:34:24,121 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1614630737, now seen corresponding path program 1 times [2021-02-23 13:34:24,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712631761] [2021-02-23 13:34:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:24,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712631761] [2021-02-23 13:34:24,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15314608] [2021-02-23 13:34:24,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,197 INFO L87 Difference]: Start difference. First operand 135 states and 199 transitions. Second operand 4 states. [2021-02-23 13:34:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,295 INFO L93 Difference]: Finished difference Result 205 states and 301 transitions. [2021-02-23 13:34:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-23 13:34:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,297 INFO L225 Difference]: With dead ends: 205 [2021-02-23 13:34:24,297 INFO L226 Difference]: Without dead ends: 143 [2021-02-23 13:34:24,298 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 [2021-02-23 13:34:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-02-23 13:34:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-02-23 13:34:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-02-23 13:34:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 203 transitions. [2021-02-23 13:34:24,313 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 203 transitions. Word has length 19 [2021-02-23 13:34:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,313 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 203 transitions. [2021-02-23 13:34:24,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,313 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 203 transitions. [2021-02-23 13:34:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 13:34:24,315 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:24,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 13:34:24,315 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,316 INFO L82 PathProgramCache]: Analyzing trace with hash -934572367, now seen corresponding path program 1 times [2021-02-23 13:34:24,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835479705] [2021-02-23 13:34:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:24,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835479705] [2021-02-23 13:34:24,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662478535] [2021-02-23 13:34:24,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,375 INFO L87 Difference]: Start difference. First operand 141 states and 203 transitions. Second operand 4 states. [2021-02-23 13:34:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,486 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2021-02-23 13:34:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-23 13:34:24,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,488 INFO L225 Difference]: With dead ends: 237 [2021-02-23 13:34:24,489 INFO L226 Difference]: Without dead ends: 235 [2021-02-23 13:34:24,489 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 [2021-02-23 13:34:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-02-23 13:34:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 201. [2021-02-23 13:34:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-02-23 13:34:24,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 283 transitions. [2021-02-23 13:34:24,505 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 283 transitions. Word has length 19 [2021-02-23 13:34:24,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,506 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 283 transitions. [2021-02-23 13:34:24,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,506 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 283 transitions. [2021-02-23 13:34:24,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 13:34:24,508 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:24,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 13:34:24,509 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1743918993, now seen corresponding path program 1 times [2021-02-23 13:34:24,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408765892] [2021-02-23 13:34:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:24,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408765892] [2021-02-23 13:34:24,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970424264] [2021-02-23 13:34:24,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,573 INFO L87 Difference]: Start difference. First operand 201 states and 283 transitions. Second operand 4 states. [2021-02-23 13:34:24,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,670 INFO L93 Difference]: Finished difference Result 445 states and 621 transitions. [2021-02-23 13:34:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-23 13:34:24,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,673 INFO L225 Difference]: With dead ends: 445 [2021-02-23 13:34:24,673 INFO L226 Difference]: Without dead ends: 259 [2021-02-23 13:34:24,674 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 [2021-02-23 13:34:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-02-23 13:34:24,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2021-02-23 13:34:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2021-02-23 13:34:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 343 transitions. [2021-02-23 13:34:24,690 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 343 transitions. Word has length 19 [2021-02-23 13:34:24,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,690 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 343 transitions. [2021-02-23 13:34:24,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 343 transitions. [2021-02-23 13:34:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 13:34:24,692 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,692 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] [2021-02-23 13:34:24,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 13:34:24,693 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1093243721, now seen corresponding path program 1 times [2021-02-23 13:34:24,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005267436] [2021-02-23 13:34:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:24,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005267436] [2021-02-23 13:34:24,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242153353] [2021-02-23 13:34:24,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,751 INFO L87 Difference]: Start difference. First operand 257 states and 343 transitions. Second operand 4 states. [2021-02-23 13:34:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,854 INFO L93 Difference]: Finished difference Result 385 states and 509 transitions. [2021-02-23 13:34:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-23 13:34:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,856 INFO L225 Difference]: With dead ends: 385 [2021-02-23 13:34:24,857 INFO L226 Difference]: Without dead ends: 267 [2021-02-23 13:34:24,857 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 [2021-02-23 13:34:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-02-23 13:34:24,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2021-02-23 13:34:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2021-02-23 13:34:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 343 transitions. [2021-02-23 13:34:24,873 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 343 transitions. Word has length 20 [2021-02-23 13:34:24,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,873 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 343 transitions. [2021-02-23 13:34:24,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,873 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 343 transitions. [2021-02-23 13:34:24,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 13:34:24,887 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,887 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] [2021-02-23 13:34:24,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 13:34:24,887 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1773302091, now seen corresponding path program 1 times [2021-02-23 13:34:24,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967191672] [2021-02-23 13:34:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:24,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967191672] [2021-02-23 13:34:24,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282469773] [2021-02-23 13:34:24,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,954 INFO L87 Difference]: Start difference. First operand 265 states and 343 transitions. Second operand 4 states. [2021-02-23 13:34:25,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:25,071 INFO L93 Difference]: Finished difference Result 427 states and 544 transitions. [2021-02-23 13:34:25,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:25,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-23 13:34:25,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:25,074 INFO L225 Difference]: With dead ends: 427 [2021-02-23 13:34:25,074 INFO L226 Difference]: Without dead ends: 425 [2021-02-23 13:34:25,075 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 [2021-02-23 13:34:25,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-02-23 13:34:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 393. [2021-02-23 13:34:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2021-02-23 13:34:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 495 transitions. [2021-02-23 13:34:25,094 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 495 transitions. Word has length 20 [2021-02-23 13:34:25,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:25,094 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 495 transitions. [2021-02-23 13:34:25,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 495 transitions. [2021-02-23 13:34:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 13:34:25,095 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:25,096 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] [2021-02-23 13:34:25,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 13:34:25,096 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:25,097 INFO L82 PathProgramCache]: Analyzing trace with hash 963955465, now seen corresponding path program 1 times [2021-02-23 13:34:25,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:25,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392037941] [2021-02-23 13:34:25,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:25,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,148 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:25,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392037941] [2021-02-23 13:34:25,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:25,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:25,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659468379] [2021-02-23 13:34:25,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:25,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:25,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:25,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:25,152 INFO L87 Difference]: Start difference. First operand 393 states and 495 transitions. Second operand 4 states. [2021-02-23 13:34:25,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:25,251 INFO L93 Difference]: Finished difference Result 857 states and 1055 transitions. [2021-02-23 13:34:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:25,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-23 13:34:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:25,253 INFO L225 Difference]: With dead ends: 857 [2021-02-23 13:34:25,253 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 13:34:25,257 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 [2021-02-23 13:34:25,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 13:34:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 13:34:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 13:34:25,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 13:34:25,258 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-02-23 13:34:25,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:25,259 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 13:34:25,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:25,259 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 13:34:25,259 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 13:34:25,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 13:34:25,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 13:34:25,674 WARN L202 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 32 [2021-02-23 13:34:25,713 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 13:34:25,713 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 13:34:25,713 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 13:34:25,713 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:34:25,714 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|)) [2021-02-23 13:34:25,714 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:34:25,714 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:34:25,714 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 13:34:25,714 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 13:34:25,714 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:34:25,714 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 95) no Hoare annotation was computed. [2021-02-23 13:34:25,715 INFO L192 CegarLoopUtils]: At program point L85-1(lines 26 90) the Hoare annotation is: true [2021-02-23 13:34:25,715 INFO L189 CegarLoopUtils]: For program point L81(line 81) no Hoare annotation was computed. [2021-02-23 13:34:25,715 INFO L189 CegarLoopUtils]: For program point L65-1(lines 26 90) no Hoare annotation was computed. [2021-02-23 13:34:25,715 INFO L189 CegarLoopUtils]: For program point L28(lines 28 30) no Hoare annotation was computed. [2021-02-23 13:34:25,715 INFO L189 CegarLoopUtils]: For program point L86(line 86) no Hoare annotation was computed. [2021-02-23 13:34:25,715 INFO L185 CegarLoopUtils]: At program point L86-1(lines 7 95) the Hoare annotation is: false [2021-02-23 13:34:25,715 INFO L189 CegarLoopUtils]: For program point L70-1(lines 26 90) no Hoare annotation was computed. [2021-02-23 13:34:25,715 INFO L189 CegarLoopUtils]: For program point L66(line 66) no Hoare annotation was computed. [2021-02-23 13:34:25,716 INFO L192 CegarLoopUtils]: At program point L91(lines 7 95) the Hoare annotation is: true [2021-02-23 13:34:25,716 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 95) no Hoare annotation was computed. [2021-02-23 13:34:25,716 INFO L189 CegarLoopUtils]: For program point L75-1(lines 26 90) no Hoare annotation was computed. [2021-02-23 13:34:25,716 INFO L189 CegarLoopUtils]: For program point L71(line 71) no Hoare annotation was computed. [2021-02-23 13:34:25,716 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 93) no Hoare annotation was computed. [2021-02-23 13:34:25,716 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 95) the Hoare annotation is: true [2021-02-23 13:34:25,716 INFO L189 CegarLoopUtils]: For program point L59-1(lines 26 90) no Hoare annotation was computed. [2021-02-23 13:34:25,716 INFO L189 CegarLoopUtils]: For program point L55-1(lines 26 90) no Hoare annotation was computed. [2021-02-23 13:34:25,716 INFO L189 CegarLoopUtils]: For program point L51-1(lines 26 90) no Hoare annotation was computed. [2021-02-23 13:34:25,717 INFO L189 CegarLoopUtils]: For program point L80-1(lines 26 90) no Hoare annotation was computed. [2021-02-23 13:34:25,717 INFO L189 CegarLoopUtils]: For program point L47-1(lines 26 90) no Hoare annotation was computed. [2021-02-23 13:34:25,717 INFO L189 CegarLoopUtils]: For program point L76(line 76) no Hoare annotation was computed. [2021-02-23 13:34:25,717 INFO L189 CegarLoopUtils]: For program point L43(lines 43 45) no Hoare annotation was computed. [2021-02-23 13:34:25,717 INFO L189 CegarLoopUtils]: For program point L43-2(lines 26 90) no Hoare annotation was computed. [2021-02-23 13:34:25,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:34:25 BoogieIcfgContainer [2021-02-23 13:34:25,728 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:34:25,729 INFO L168 Benchmark]: Toolchain (without parser) took 5097.23 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 138.9 MB in the beginning and 138.2 MB in the end (delta: 690.1 kB). Peak memory consumption was 105.2 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:25,730 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 163.6 MB. Free memory was 133.9 MB in the beginning and 133.4 MB in the end (delta: 419.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:34:25,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.92 ms. Allocated memory is still 163.6 MB. Free memory was 137.8 MB in the beginning and 128.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:25,731 INFO L168 Benchmark]: Boogie Preprocessor took 72.58 ms. Allocated memory is still 163.6 MB. Free memory was 128.3 MB in the beginning and 126.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:25,732 INFO L168 Benchmark]: RCFGBuilder took 601.86 ms. Allocated memory is still 163.6 MB. Free memory was 126.5 MB in the beginning and 110.4 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:25,732 INFO L168 Benchmark]: TraceAbstraction took 4143.39 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 110.0 MB in the beginning and 138.2 MB in the end (delta: -28.2 MB). Peak memory consumption was 76.9 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:25,735 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 163.6 MB. Free memory was 133.9 MB in the beginning and 133.4 MB in the end (delta: 419.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 252.92 ms. Allocated memory is still 163.6 MB. Free memory was 137.8 MB in the beginning and 128.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.58 ms. Allocated memory is still 163.6 MB. Free memory was 128.3 MB in the beginning and 126.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 601.86 ms. Allocated memory is still 163.6 MB. Free memory was 126.5 MB in the beginning and 110.4 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4143.39 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 110.0 MB in the beginning and 138.2 MB in the end (delta: -28.2 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: 3.5s, OverallIterations: 13, TraceHistogramMax: 1, AutomataDifference: 1.9s, 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, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s 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, 0.4s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s 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...