/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_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:08:32,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:08:32,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:08:32,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 16:08:32,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:08:32,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:08:32,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:08:32,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:08:32,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:08:32,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:08:32,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:08:32,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:08:32,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:08:32,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:08:32,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:08:32,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:08:32,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:08:32,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:08:32,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:08:32,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:08:32,134 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 [2021-02-21 16:08:32,184 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:08:32,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:08:32,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:08:32,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:08:32,187 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:08:32,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:08:32,188 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:08:32,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:08:32,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:08:32,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:08:32,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:08:32,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:08:32,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:08:32,189 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:08:32,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:08:32,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:08:32,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:08:32,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:08:32,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:08:32,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:08:32,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:08:32,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:08:32,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:08:32,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:08:32,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:08:32,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:08:32,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:08:32,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:08:32,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:08:32,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:08:32,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:08:32,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:08:32,682 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:08:32,683 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:08:32,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2021-02-21 16:08:32,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27b3be528/b16011691a2445b393cec4ebdb647db6/FLAG821bc8772 [2021-02-21 16:08:33,486 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:08:33,487 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_9.c [2021-02-21 16:08:33,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27b3be528/b16011691a2445b393cec4ebdb647db6/FLAG821bc8772 [2021-02-21 16:08:33,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27b3be528/b16011691a2445b393cec4ebdb647db6 [2021-02-21 16:08:33,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:08:33,876 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:08:33,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:08:33,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:08:33,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:08:33,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:08:33" (1/1) ... [2021-02-21 16:08:33,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@525a8bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:33, skipping insertion in model container [2021-02-21 16:08:33,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:08:33" (1/1) ... [2021-02-21 16:08:33,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:08:33,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:08:34,098 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_9.c[3555,3568] [2021-02-21 16:08:34,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:08:34,113 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:08:34,141 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_9.c[3555,3568] [2021-02-21 16:08:34,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:08:34,167 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:08:34,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:34 WrapperNode [2021-02-21 16:08:34,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:08:34,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:08:34,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:08:34,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:08:34,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:34" (1/1) ... [2021-02-21 16:08:34,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:34" (1/1) ... [2021-02-21 16:08:34,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:34" (1/1) ... [2021-02-21 16:08:34,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:34" (1/1) ... [2021-02-21 16:08:34,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:34" (1/1) ... [2021-02-21 16:08:34,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:34" (1/1) ... [2021-02-21 16:08:34,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:34" (1/1) ... [2021-02-21 16:08:34,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:08:34,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:08:34,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:08:34,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:08:34,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:34" (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 [2021-02-21 16:08:34,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:08:34,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:08:34,329 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:08:34,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:08:34,329 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:08:34,329 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:08:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:08:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:08:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:08:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:08:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:08:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:08:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:08:34,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:08:34,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:08:34,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:08:34,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:08:34,698 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 16:08:34,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:08:34 BoogieIcfgContainer [2021-02-21 16:08:34,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:08:34,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:08:34,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:08:34,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:08:34,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:08:33" (1/3) ... [2021-02-21 16:08:34,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69433d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:08:34, skipping insertion in model container [2021-02-21 16:08:34,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:34" (2/3) ... [2021-02-21 16:08:34,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69433d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:08:34, skipping insertion in model container [2021-02-21 16:08:34,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:08:34" (3/3) ... [2021-02-21 16:08:34,710 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2021-02-21 16:08:34,718 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:08:34,724 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:08:34,749 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:08:34,787 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:08:34,787 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:08:34,788 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:08:34,788 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:08:34,788 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:08:34,788 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:08:34,788 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:08:34,788 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:08:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-21 16:08:34,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 16:08:34,824 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:34,825 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] [2021-02-21 16:08:34,825 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:34,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1605461033, now seen corresponding path program 1 times [2021-02-21 16:08:34,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:34,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810818797] [2021-02-21 16:08:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:35,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:35,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:35,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:35,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810818797] [2021-02-21 16:08:35,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:35,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:35,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261501705] [2021-02-21 16:08:35,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:35,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:35,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:35,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:35,297 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2021-02-21 16:08:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:35,599 INFO L93 Difference]: Finished difference Result 82 states and 139 transitions. [2021-02-21 16:08:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:35,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 16:08:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:35,623 INFO L225 Difference]: With dead ends: 82 [2021-02-21 16:08:35,624 INFO L226 Difference]: Without dead ends: 67 [2021-02-21 16:08:35,629 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 [2021-02-21 16:08:35,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-21 16:08:35,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2021-02-21 16:08:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-21 16:08:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 82 transitions. [2021-02-21 16:08:35,710 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 82 transitions. Word has length 20 [2021-02-21 16:08:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:35,711 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 82 transitions. [2021-02-21 16:08:35,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 82 transitions. [2021-02-21 16:08:35,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 16:08:35,713 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:35,714 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] [2021-02-21 16:08:35,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:08:35,714 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:35,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:35,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1347295595, now seen corresponding path program 1 times [2021-02-21 16:08:35,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:35,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912425172] [2021-02-21 16:08:35,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:35,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:35,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:35,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:35,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912425172] [2021-02-21 16:08:35,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:35,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:35,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745651065] [2021-02-21 16:08:35,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:35,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:35,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:35,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:35,861 INFO L87 Difference]: Start difference. First operand 47 states and 82 transitions. Second operand 4 states. [2021-02-21 16:08:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:36,034 INFO L93 Difference]: Finished difference Result 108 states and 193 transitions. [2021-02-21 16:08:36,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:36,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 16:08:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:36,037 INFO L225 Difference]: With dead ends: 108 [2021-02-21 16:08:36,037 INFO L226 Difference]: Without dead ends: 67 [2021-02-21 16:08:36,038 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 [2021-02-21 16:08:36,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-21 16:08:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-02-21 16:08:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-21 16:08:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2021-02-21 16:08:36,051 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 20 [2021-02-21 16:08:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:36,051 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2021-02-21 16:08:36,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2021-02-21 16:08:36,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:08:36,053 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:36,053 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, 1] [2021-02-21 16:08:36,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:08:36,053 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:36,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1770529236, now seen corresponding path program 1 times [2021-02-21 16:08:36,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:36,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6651049] [2021-02-21 16:08:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:36,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:36,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:36,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:36,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6651049] [2021-02-21 16:08:36,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:36,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:36,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477157290] [2021-02-21 16:08:36,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:36,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:36,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:36,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:36,171 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 4 states. [2021-02-21 16:08:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:36,359 INFO L93 Difference]: Finished difference Result 100 states and 172 transitions. [2021-02-21 16:08:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:36,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 16:08:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:36,361 INFO L225 Difference]: With dead ends: 100 [2021-02-21 16:08:36,361 INFO L226 Difference]: Without dead ends: 70 [2021-02-21 16:08:36,362 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 [2021-02-21 16:08:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-21 16:08:36,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-02-21 16:08:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-02-21 16:08:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 116 transitions. [2021-02-21 16:08:36,375 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 116 transitions. Word has length 21 [2021-02-21 16:08:36,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:36,375 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 116 transitions. [2021-02-21 16:08:36,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 116 transitions. [2021-02-21 16:08:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:08:36,377 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:36,377 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, 1] [2021-02-21 16:08:36,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:08:36,377 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:36,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:36,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1183723222, now seen corresponding path program 1 times [2021-02-21 16:08:36,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:36,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384605624] [2021-02-21 16:08:36,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:36,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:36,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:36,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:36,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384605624] [2021-02-21 16:08:36,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:36,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:36,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187888271] [2021-02-21 16:08:36,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:36,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:36,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:36,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:36,467 INFO L87 Difference]: Start difference. First operand 68 states and 116 transitions. Second operand 4 states. [2021-02-21 16:08:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:36,619 INFO L93 Difference]: Finished difference Result 184 states and 324 transitions. [2021-02-21 16:08:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:36,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 16:08:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:36,622 INFO L225 Difference]: With dead ends: 184 [2021-02-21 16:08:36,622 INFO L226 Difference]: Without dead ends: 125 [2021-02-21 16:08:36,623 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 [2021-02-21 16:08:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-02-21 16:08:36,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-02-21 16:08:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-02-21 16:08:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 213 transitions. [2021-02-21 16:08:36,637 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 213 transitions. Word has length 21 [2021-02-21 16:08:36,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:36,638 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 213 transitions. [2021-02-21 16:08:36,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:36,638 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 213 transitions. [2021-02-21 16:08:36,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:08:36,639 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:36,639 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, 1] [2021-02-21 16:08:36,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:08:36,640 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:36,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:36,640 INFO L82 PathProgramCache]: Analyzing trace with hash 925557784, now seen corresponding path program 1 times [2021-02-21 16:08:36,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:36,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397156942] [2021-02-21 16:08:36,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:36,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:36,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:36,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:36,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397156942] [2021-02-21 16:08:36,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:36,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:36,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278455861] [2021-02-21 16:08:36,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:36,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:36,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:36,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:36,716 INFO L87 Difference]: Start difference. First operand 123 states and 213 transitions. Second operand 4 states. [2021-02-21 16:08:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:36,884 INFO L93 Difference]: Finished difference Result 159 states and 275 transitions. [2021-02-21 16:08:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:36,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 16:08:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:36,892 INFO L225 Difference]: With dead ends: 159 [2021-02-21 16:08:36,893 INFO L226 Difference]: Without dead ends: 157 [2021-02-21 16:08:36,900 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 [2021-02-21 16:08:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-21 16:08:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 123. [2021-02-21 16:08:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-02-21 16:08:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 211 transitions. [2021-02-21 16:08:36,930 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 211 transitions. Word has length 21 [2021-02-21 16:08:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:36,931 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 211 transitions. [2021-02-21 16:08:36,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:36,931 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 211 transitions. [2021-02-21 16:08:36,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:08:36,932 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:36,932 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, 1, 1] [2021-02-21 16:08:36,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:08:36,933 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:36,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:36,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1959071734, now seen corresponding path program 1 times [2021-02-21 16:08:36,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:36,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348280355] [2021-02-21 16:08:36,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:36,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:36,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:37,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348280355] [2021-02-21 16:08:37,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:37,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:37,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535273072] [2021-02-21 16:08:37,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:37,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:37,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:37,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:37,031 INFO L87 Difference]: Start difference. First operand 123 states and 211 transitions. Second operand 4 states. [2021-02-21 16:08:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:37,165 INFO L93 Difference]: Finished difference Result 227 states and 395 transitions. [2021-02-21 16:08:37,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:37,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:08:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:37,168 INFO L225 Difference]: With dead ends: 227 [2021-02-21 16:08:37,168 INFO L226 Difference]: Without dead ends: 225 [2021-02-21 16:08:37,169 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 [2021-02-21 16:08:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-02-21 16:08:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 167. [2021-02-21 16:08:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-02-21 16:08:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 285 transitions. [2021-02-21 16:08:37,182 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 285 transitions. Word has length 22 [2021-02-21 16:08:37,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:37,182 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 285 transitions. [2021-02-21 16:08:37,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 285 transitions. [2021-02-21 16:08:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:08:37,184 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:37,184 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, 1, 1] [2021-02-21 16:08:37,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:08:37,185 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:37,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:37,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1700906296, now seen corresponding path program 1 times [2021-02-21 16:08:37,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:37,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904775285] [2021-02-21 16:08:37,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:37,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:37,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904775285] [2021-02-21 16:08:37,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:37,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:37,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235643419] [2021-02-21 16:08:37,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:37,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:37,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:37,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:37,249 INFO L87 Difference]: Start difference. First operand 167 states and 285 transitions. Second operand 4 states. [2021-02-21 16:08:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:37,393 INFO L93 Difference]: Finished difference Result 391 states and 675 transitions. [2021-02-21 16:08:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:37,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:08:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:37,395 INFO L225 Difference]: With dead ends: 391 [2021-02-21 16:08:37,396 INFO L226 Difference]: Without dead ends: 233 [2021-02-21 16:08:37,397 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 [2021-02-21 16:08:37,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-02-21 16:08:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 231. [2021-02-21 16:08:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2021-02-21 16:08:37,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 391 transitions. [2021-02-21 16:08:37,411 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 391 transitions. Word has length 22 [2021-02-21 16:08:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:37,411 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 391 transitions. [2021-02-21 16:08:37,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:37,412 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 391 transitions. [2021-02-21 16:08:37,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:08:37,413 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:37,413 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, 1, 1, 1] [2021-02-21 16:08:37,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:08:37,413 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:37,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:37,414 INFO L82 PathProgramCache]: Analyzing trace with hash -601467221, now seen corresponding path program 1 times [2021-02-21 16:08:37,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:37,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489739790] [2021-02-21 16:08:37,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:37,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:37,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489739790] [2021-02-21 16:08:37,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:37,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:37,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094198668] [2021-02-21 16:08:37,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:37,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:37,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:37,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:37,471 INFO L87 Difference]: Start difference. First operand 231 states and 391 transitions. Second operand 4 states. [2021-02-21 16:08:37,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:37,609 INFO L93 Difference]: Finished difference Result 349 states and 589 transitions. [2021-02-21 16:08:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:37,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:08:37,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:37,612 INFO L225 Difference]: With dead ends: 349 [2021-02-21 16:08:37,612 INFO L226 Difference]: Without dead ends: 239 [2021-02-21 16:08:37,613 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 [2021-02-21 16:08:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-02-21 16:08:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2021-02-21 16:08:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2021-02-21 16:08:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 395 transitions. [2021-02-21 16:08:37,625 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 395 transitions. Word has length 23 [2021-02-21 16:08:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:37,626 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 395 transitions. [2021-02-21 16:08:37,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:37,626 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 395 transitions. [2021-02-21 16:08:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:08:37,627 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:37,627 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, 1, 1, 1] [2021-02-21 16:08:37,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:08:37,628 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:37,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1188273235, now seen corresponding path program 1 times [2021-02-21 16:08:37,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:37,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950972206] [2021-02-21 16:08:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:37,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:37,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950972206] [2021-02-21 16:08:37,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:37,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454537394] [2021-02-21 16:08:37,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:37,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:37,686 INFO L87 Difference]: Start difference. First operand 237 states and 395 transitions. Second operand 4 states. [2021-02-21 16:08:37,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:37,811 INFO L93 Difference]: Finished difference Result 429 states and 725 transitions. [2021-02-21 16:08:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:37,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:08:37,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:37,814 INFO L225 Difference]: With dead ends: 429 [2021-02-21 16:08:37,814 INFO L226 Difference]: Without dead ends: 427 [2021-02-21 16:08:37,815 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 [2021-02-21 16:08:37,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-02-21 16:08:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 329. [2021-02-21 16:08:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2021-02-21 16:08:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 539 transitions. [2021-02-21 16:08:37,829 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 539 transitions. Word has length 23 [2021-02-21 16:08:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:37,829 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 539 transitions. [2021-02-21 16:08:37,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 539 transitions. [2021-02-21 16:08:37,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:08:37,831 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:37,831 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, 1, 1, 1] [2021-02-21 16:08:37,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 16:08:37,831 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:37,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:37,832 INFO L82 PathProgramCache]: Analyzing trace with hash -930107797, now seen corresponding path program 1 times [2021-02-21 16:08:37,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:37,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026357907] [2021-02-21 16:08:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:37,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:37,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026357907] [2021-02-21 16:08:37,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:37,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:37,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811512552] [2021-02-21 16:08:37,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:37,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:37,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:37,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:37,890 INFO L87 Difference]: Start difference. First operand 329 states and 539 transitions. Second operand 4 states. [2021-02-21 16:08:38,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:38,013 INFO L93 Difference]: Finished difference Result 765 states and 1261 transitions. [2021-02-21 16:08:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:38,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:08:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:38,016 INFO L225 Difference]: With dead ends: 765 [2021-02-21 16:08:38,016 INFO L226 Difference]: Without dead ends: 451 [2021-02-21 16:08:38,018 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 [2021-02-21 16:08:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-02-21 16:08:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 449. [2021-02-21 16:08:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2021-02-21 16:08:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 727 transitions. [2021-02-21 16:08:38,037 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 727 transitions. Word has length 23 [2021-02-21 16:08:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:38,037 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 727 transitions. [2021-02-21 16:08:38,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 727 transitions. [2021-02-21 16:08:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:08:38,039 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:38,039 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, 1, 1, 1, 1] [2021-02-21 16:08:38,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 16:08:38,039 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:38,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:38,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1818450109, now seen corresponding path program 1 times [2021-02-21 16:08:38,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:38,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768223961] [2021-02-21 16:08:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:38,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:38,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768223961] [2021-02-21 16:08:38,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:38,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:38,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729140070] [2021-02-21 16:08:38,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:38,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:38,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:38,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:38,094 INFO L87 Difference]: Start difference. First operand 449 states and 727 transitions. Second operand 4 states. [2021-02-21 16:08:38,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:38,230 INFO L93 Difference]: Finished difference Result 673 states and 1085 transitions. [2021-02-21 16:08:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:38,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:08:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:38,234 INFO L225 Difference]: With dead ends: 673 [2021-02-21 16:08:38,234 INFO L226 Difference]: Without dead ends: 459 [2021-02-21 16:08:38,235 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 [2021-02-21 16:08:38,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-02-21 16:08:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2021-02-21 16:08:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2021-02-21 16:08:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 727 transitions. [2021-02-21 16:08:38,255 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 727 transitions. Word has length 24 [2021-02-21 16:08:38,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:38,255 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 727 transitions. [2021-02-21 16:08:38,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 727 transitions. [2021-02-21 16:08:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:08:38,256 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:38,256 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, 1, 1, 1, 1] [2021-02-21 16:08:38,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 16:08:38,257 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:38,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:38,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1231644095, now seen corresponding path program 1 times [2021-02-21 16:08:38,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:38,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842308714] [2021-02-21 16:08:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:38,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:38,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842308714] [2021-02-21 16:08:38,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:38,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:38,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819754420] [2021-02-21 16:08:38,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:38,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:38,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:38,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:38,318 INFO L87 Difference]: Start difference. First operand 457 states and 727 transitions. Second operand 4 states. [2021-02-21 16:08:38,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:38,455 INFO L93 Difference]: Finished difference Result 813 states and 1313 transitions. [2021-02-21 16:08:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:38,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:08:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:38,460 INFO L225 Difference]: With dead ends: 813 [2021-02-21 16:08:38,460 INFO L226 Difference]: Without dead ends: 811 [2021-02-21 16:08:38,461 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 [2021-02-21 16:08:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-02-21 16:08:38,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 649. [2021-02-21 16:08:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2021-02-21 16:08:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1007 transitions. [2021-02-21 16:08:38,487 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1007 transitions. Word has length 24 [2021-02-21 16:08:38,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:38,488 INFO L480 AbstractCegarLoop]: Abstraction has 649 states and 1007 transitions. [2021-02-21 16:08:38,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:38,488 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1007 transitions. [2021-02-21 16:08:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:08:38,489 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:38,490 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, 1, 1, 1, 1] [2021-02-21 16:08:38,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 16:08:38,490 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:38,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:38,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1489809533, now seen corresponding path program 1 times [2021-02-21 16:08:38,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:38,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065773402] [2021-02-21 16:08:38,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:38,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:38,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065773402] [2021-02-21 16:08:38,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:38,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:38,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182836964] [2021-02-21 16:08:38,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:38,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:38,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:38,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:38,548 INFO L87 Difference]: Start difference. First operand 649 states and 1007 transitions. Second operand 4 states. [2021-02-21 16:08:38,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:38,692 INFO L93 Difference]: Finished difference Result 1501 states and 2337 transitions. [2021-02-21 16:08:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:38,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:08:38,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:38,698 INFO L225 Difference]: With dead ends: 1501 [2021-02-21 16:08:38,698 INFO L226 Difference]: Without dead ends: 875 [2021-02-21 16:08:38,700 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 [2021-02-21 16:08:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-02-21 16:08:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 873. [2021-02-21 16:08:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2021-02-21 16:08:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1335 transitions. [2021-02-21 16:08:38,754 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1335 transitions. Word has length 24 [2021-02-21 16:08:38,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:38,755 INFO L480 AbstractCegarLoop]: Abstraction has 873 states and 1335 transitions. [2021-02-21 16:08:38,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:38,755 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1335 transitions. [2021-02-21 16:08:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 16:08:38,757 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:38,757 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, 1, 1, 1, 1, 1] [2021-02-21 16:08:38,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 16:08:38,757 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:38,758 INFO L82 PathProgramCache]: Analyzing trace with hash -473523648, now seen corresponding path program 1 times [2021-02-21 16:08:38,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:38,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593906071] [2021-02-21 16:08:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:38,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:38,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593906071] [2021-02-21 16:08:38,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:38,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:38,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666484407] [2021-02-21 16:08:38,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:38,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:38,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:38,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:38,843 INFO L87 Difference]: Start difference. First operand 873 states and 1335 transitions. Second operand 4 states. [2021-02-21 16:08:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:38,997 INFO L93 Difference]: Finished difference Result 1309 states and 1993 transitions. [2021-02-21 16:08:38,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:38,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-21 16:08:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:39,003 INFO L225 Difference]: With dead ends: 1309 [2021-02-21 16:08:39,003 INFO L226 Difference]: Without dead ends: 891 [2021-02-21 16:08:39,005 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 [2021-02-21 16:08:39,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-02-21 16:08:39,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 889. [2021-02-21 16:08:39,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889 states. [2021-02-21 16:08:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1335 transitions. [2021-02-21 16:08:39,039 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1335 transitions. Word has length 25 [2021-02-21 16:08:39,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:39,040 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 1335 transitions. [2021-02-21 16:08:39,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:39,040 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1335 transitions. [2021-02-21 16:08:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 16:08:39,041 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:39,042 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, 1, 1, 1, 1, 1] [2021-02-21 16:08:39,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-21 16:08:39,042 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:39,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:39,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1060329662, now seen corresponding path program 1 times [2021-02-21 16:08:39,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:39,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237682974] [2021-02-21 16:08:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:39,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:39,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:39,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:39,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237682974] [2021-02-21 16:08:39,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:39,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:39,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409104865] [2021-02-21 16:08:39,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:39,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:39,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:39,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:39,096 INFO L87 Difference]: Start difference. First operand 889 states and 1335 transitions. Second operand 4 states. [2021-02-21 16:08:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:39,265 INFO L93 Difference]: Finished difference Result 1549 states and 2361 transitions. [2021-02-21 16:08:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:39,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-21 16:08:39,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:39,274 INFO L225 Difference]: With dead ends: 1549 [2021-02-21 16:08:39,274 INFO L226 Difference]: Without dead ends: 1547 [2021-02-21 16:08:39,275 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 [2021-02-21 16:08:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-02-21 16:08:39,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1289. [2021-02-21 16:08:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1289 states. [2021-02-21 16:08:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1879 transitions. [2021-02-21 16:08:39,327 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1879 transitions. Word has length 25 [2021-02-21 16:08:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:39,327 INFO L480 AbstractCegarLoop]: Abstraction has 1289 states and 1879 transitions. [2021-02-21 16:08:39,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1879 transitions. [2021-02-21 16:08:39,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 16:08:39,330 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:39,330 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, 1, 1, 1, 1, 1] [2021-02-21 16:08:39,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-21 16:08:39,331 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:39,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:39,331 INFO L82 PathProgramCache]: Analyzing trace with hash -802164224, now seen corresponding path program 1 times [2021-02-21 16:08:39,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:39,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603202154] [2021-02-21 16:08:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:39,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:39,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:39,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:39,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603202154] [2021-02-21 16:08:39,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:39,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:39,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498854892] [2021-02-21 16:08:39,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:39,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:39,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:39,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:39,386 INFO L87 Difference]: Start difference. First operand 1289 states and 1879 transitions. Second operand 4 states. [2021-02-21 16:08:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:39,578 INFO L93 Difference]: Finished difference Result 2957 states and 4313 transitions. [2021-02-21 16:08:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:39,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-21 16:08:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:39,587 INFO L225 Difference]: With dead ends: 2957 [2021-02-21 16:08:39,587 INFO L226 Difference]: Without dead ends: 1707 [2021-02-21 16:08:39,590 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 [2021-02-21 16:08:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-02-21 16:08:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1705. [2021-02-21 16:08:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1705 states. [2021-02-21 16:08:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2439 transitions. [2021-02-21 16:08:39,657 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2439 transitions. Word has length 25 [2021-02-21 16:08:39,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:39,657 INFO L480 AbstractCegarLoop]: Abstraction has 1705 states and 2439 transitions. [2021-02-21 16:08:39,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2439 transitions. [2021-02-21 16:08:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:08:39,660 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:39,660 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, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:39,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-21 16:08:39,661 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:39,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:39,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1489734258, now seen corresponding path program 1 times [2021-02-21 16:08:39,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:39,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797629044] [2021-02-21 16:08:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:39,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:39,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:39,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:39,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797629044] [2021-02-21 16:08:39,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:39,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:39,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159274686] [2021-02-21 16:08:39,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:39,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:39,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:39,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:39,720 INFO L87 Difference]: Start difference. First operand 1705 states and 2439 transitions. Second operand 4 states. [2021-02-21 16:08:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:39,883 INFO L93 Difference]: Finished difference Result 2557 states and 3641 transitions. [2021-02-21 16:08:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:39,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-21 16:08:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:39,892 INFO L225 Difference]: With dead ends: 2557 [2021-02-21 16:08:39,892 INFO L226 Difference]: Without dead ends: 1739 [2021-02-21 16:08:39,895 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 [2021-02-21 16:08:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-02-21 16:08:39,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1737. [2021-02-21 16:08:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1737 states. [2021-02-21 16:08:39,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2439 transitions. [2021-02-21 16:08:39,968 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2439 transitions. Word has length 26 [2021-02-21 16:08:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:39,968 INFO L480 AbstractCegarLoop]: Abstraction has 1737 states and 2439 transitions. [2021-02-21 16:08:39,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:39,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2439 transitions. [2021-02-21 16:08:39,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:08:39,971 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:39,971 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, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:39,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-21 16:08:39,972 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:39,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:39,972 INFO L82 PathProgramCache]: Analyzing trace with hash 902928244, now seen corresponding path program 1 times [2021-02-21 16:08:39,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:39,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616574485] [2021-02-21 16:08:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:39,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:39,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:40,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:40,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616574485] [2021-02-21 16:08:40,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:40,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:40,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497651742] [2021-02-21 16:08:40,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:40,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:40,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:40,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:40,024 INFO L87 Difference]: Start difference. First operand 1737 states and 2439 transitions. Second operand 4 states. [2021-02-21 16:08:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:40,237 INFO L93 Difference]: Finished difference Result 2957 states and 4201 transitions. [2021-02-21 16:08:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:40,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-21 16:08:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:40,251 INFO L225 Difference]: With dead ends: 2957 [2021-02-21 16:08:40,251 INFO L226 Difference]: Without dead ends: 2955 [2021-02-21 16:08:40,253 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 [2021-02-21 16:08:40,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-02-21 16:08:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2569. [2021-02-21 16:08:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2569 states. [2021-02-21 16:08:40,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 3495 transitions. [2021-02-21 16:08:40,345 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 3495 transitions. Word has length 26 [2021-02-21 16:08:40,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:40,345 INFO L480 AbstractCegarLoop]: Abstraction has 2569 states and 3495 transitions. [2021-02-21 16:08:40,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:40,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 3495 transitions. [2021-02-21 16:08:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:08:40,349 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:40,349 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, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:40,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-21 16:08:40,350 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:40,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:40,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1161093682, now seen corresponding path program 1 times [2021-02-21 16:08:40,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:40,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130120958] [2021-02-21 16:08:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:40,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:40,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:40,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:40,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130120958] [2021-02-21 16:08:40,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:40,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:40,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221508] [2021-02-21 16:08:40,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:40,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:40,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:40,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:40,400 INFO L87 Difference]: Start difference. First operand 2569 states and 3495 transitions. Second operand 4 states. [2021-02-21 16:08:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:40,647 INFO L93 Difference]: Finished difference Result 5837 states and 7913 transitions. [2021-02-21 16:08:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:40,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-21 16:08:40,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:40,661 INFO L225 Difference]: With dead ends: 5837 [2021-02-21 16:08:40,662 INFO L226 Difference]: Without dead ends: 3339 [2021-02-21 16:08:40,666 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 [2021-02-21 16:08:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-02-21 16:08:40,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3337. [2021-02-21 16:08:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3337 states. [2021-02-21 16:08:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 4423 transitions. [2021-02-21 16:08:40,795 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 4423 transitions. Word has length 26 [2021-02-21 16:08:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:40,795 INFO L480 AbstractCegarLoop]: Abstraction has 3337 states and 4423 transitions. [2021-02-21 16:08:40,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 4423 transitions. [2021-02-21 16:08:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 16:08:40,800 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:40,800 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:40,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-21 16:08:40,801 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:40,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2073779755, now seen corresponding path program 1 times [2021-02-21 16:08:40,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:40,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677159294] [2021-02-21 16:08:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:40,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:40,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:40,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:40,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677159294] [2021-02-21 16:08:40,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:40,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:40,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945466054] [2021-02-21 16:08:40,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:40,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:40,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:40,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:40,851 INFO L87 Difference]: Start difference. First operand 3337 states and 4423 transitions. Second operand 4 states. [2021-02-21 16:08:41,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:41,034 INFO L93 Difference]: Finished difference Result 5005 states and 6601 transitions. [2021-02-21 16:08:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:41,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-21 16:08:41,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:41,051 INFO L225 Difference]: With dead ends: 5005 [2021-02-21 16:08:41,051 INFO L226 Difference]: Without dead ends: 3403 [2021-02-21 16:08:41,055 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 [2021-02-21 16:08:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2021-02-21 16:08:41,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3401. [2021-02-21 16:08:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3401 states. [2021-02-21 16:08:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 4423 transitions. [2021-02-21 16:08:41,233 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 4423 transitions. Word has length 27 [2021-02-21 16:08:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:41,233 INFO L480 AbstractCegarLoop]: Abstraction has 3401 states and 4423 transitions. [2021-02-21 16:08:41,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 4423 transitions. [2021-02-21 16:08:41,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 16:08:41,238 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:41,238 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:41,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-21 16:08:41,240 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1634381527, now seen corresponding path program 1 times [2021-02-21 16:08:41,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:41,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11993339] [2021-02-21 16:08:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:41,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:41,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:41,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:41,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:41,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:41,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11993339] [2021-02-21 16:08:41,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:41,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:41,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54775382] [2021-02-21 16:08:41,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:41,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:41,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:41,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:41,312 INFO L87 Difference]: Start difference. First operand 3401 states and 4423 transitions. Second operand 4 states. [2021-02-21 16:08:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:41,557 INFO L93 Difference]: Finished difference Result 5645 states and 7369 transitions. [2021-02-21 16:08:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:41,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-21 16:08:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:41,583 INFO L225 Difference]: With dead ends: 5645 [2021-02-21 16:08:41,583 INFO L226 Difference]: Without dead ends: 5643 [2021-02-21 16:08:41,585 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 [2021-02-21 16:08:41,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2021-02-21 16:08:41,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5129. [2021-02-21 16:08:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5129 states. [2021-02-21 16:08:41,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5129 states to 5129 states and 6471 transitions. [2021-02-21 16:08:41,782 INFO L78 Accepts]: Start accepts. Automaton has 5129 states and 6471 transitions. Word has length 27 [2021-02-21 16:08:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:41,783 INFO L480 AbstractCegarLoop]: Abstraction has 5129 states and 6471 transitions. [2021-02-21 16:08:41,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 5129 states and 6471 transitions. [2021-02-21 16:08:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 16:08:41,791 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:41,791 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:41,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-21 16:08:41,791 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:41,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:41,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1892546965, now seen corresponding path program 1 times [2021-02-21 16:08:41,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:41,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117714024] [2021-02-21 16:08:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:41,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:41,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:41,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:41,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:41,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:41,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117714024] [2021-02-21 16:08:41,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:41,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:41,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119806244] [2021-02-21 16:08:41,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:41,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:41,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:41,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:41,846 INFO L87 Difference]: Start difference. First operand 5129 states and 6471 transitions. Second operand 4 states. [2021-02-21 16:08:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:42,121 INFO L93 Difference]: Finished difference Result 11533 states and 14409 transitions. [2021-02-21 16:08:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:42,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-21 16:08:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:42,140 INFO L225 Difference]: With dead ends: 11533 [2021-02-21 16:08:42,140 INFO L226 Difference]: Without dead ends: 6539 [2021-02-21 16:08:42,150 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 [2021-02-21 16:08:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2021-02-21 16:08:42,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6537. [2021-02-21 16:08:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6537 states. [2021-02-21 16:08:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6537 states to 6537 states and 7943 transitions. [2021-02-21 16:08:42,448 INFO L78 Accepts]: Start accepts. Automaton has 6537 states and 7943 transitions. Word has length 27 [2021-02-21 16:08:42,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:42,449 INFO L480 AbstractCegarLoop]: Abstraction has 6537 states and 7943 transitions. [2021-02-21 16:08:42,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 6537 states and 7943 transitions. [2021-02-21 16:08:42,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:08:42,458 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:42,458 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:42,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-21 16:08:42,458 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:42,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:42,459 INFO L82 PathProgramCache]: Analyzing trace with hash -873564121, now seen corresponding path program 1 times [2021-02-21 16:08:42,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:42,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260900840] [2021-02-21 16:08:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:42,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:42,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:42,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:42,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:42,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:42,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:42,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:42,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:42,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:42,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260900840] [2021-02-21 16:08:42,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:42,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:42,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058836006] [2021-02-21 16:08:42,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:42,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:42,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:42,515 INFO L87 Difference]: Start difference. First operand 6537 states and 7943 transitions. Second operand 4 states. [2021-02-21 16:08:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:42,778 INFO L93 Difference]: Finished difference Result 9805 states and 11849 transitions. [2021-02-21 16:08:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:42,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-21 16:08:42,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:42,795 INFO L225 Difference]: With dead ends: 9805 [2021-02-21 16:08:42,795 INFO L226 Difference]: Without dead ends: 6667 [2021-02-21 16:08:42,804 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 [2021-02-21 16:08:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2021-02-21 16:08:43,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6665. [2021-02-21 16:08:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6665 states. [2021-02-21 16:08:43,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 7943 transitions. [2021-02-21 16:08:43,104 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 7943 transitions. Word has length 28 [2021-02-21 16:08:43,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:43,104 INFO L480 AbstractCegarLoop]: Abstraction has 6665 states and 7943 transitions. [2021-02-21 16:08:43,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:43,105 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 7943 transitions. [2021-02-21 16:08:43,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:08:43,113 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:43,114 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:43,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-02-21 16:08:43,114 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1460370135, now seen corresponding path program 1 times [2021-02-21 16:08:43,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:43,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156539113] [2021-02-21 16:08:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:43,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:43,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:43,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:43,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:43,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:43,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:43,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:43,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:43,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:43,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156539113] [2021-02-21 16:08:43,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:43,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:43,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477768507] [2021-02-21 16:08:43,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:43,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:43,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:43,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:43,165 INFO L87 Difference]: Start difference. First operand 6665 states and 7943 transitions. Second operand 4 states. [2021-02-21 16:08:43,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:43,545 INFO L93 Difference]: Finished difference Result 10763 states and 12680 transitions. [2021-02-21 16:08:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:43,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-21 16:08:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:43,568 INFO L225 Difference]: With dead ends: 10763 [2021-02-21 16:08:43,568 INFO L226 Difference]: Without dead ends: 10761 [2021-02-21 16:08:43,571 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 [2021-02-21 16:08:43,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10761 states. [2021-02-21 16:08:43,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10761 to 10249. [2021-02-21 16:08:43,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10249 states. [2021-02-21 16:08:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10249 states to 10249 states and 11911 transitions. [2021-02-21 16:08:43,917 INFO L78 Accepts]: Start accepts. Automaton has 10249 states and 11911 transitions. Word has length 28 [2021-02-21 16:08:43,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:43,917 INFO L480 AbstractCegarLoop]: Abstraction has 10249 states and 11911 transitions. [2021-02-21 16:08:43,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:43,918 INFO L276 IsEmpty]: Start isEmpty. Operand 10249 states and 11911 transitions. [2021-02-21 16:08:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:08:43,935 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:43,935 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:43,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-02-21 16:08:43,936 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:43,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1202204697, now seen corresponding path program 1 times [2021-02-21 16:08:43,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:43,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48487831] [2021-02-21 16:08:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:43,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:43,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:43,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:43,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:43,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:43,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:43,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:43,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:43,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:43,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48487831] [2021-02-21 16:08:43,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:43,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:43,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522102459] [2021-02-21 16:08:43,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:43,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:43,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:43,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:43,990 INFO L87 Difference]: Start difference. First operand 10249 states and 11911 transitions. Second operand 4 states. [2021-02-21 16:08:44,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:44,494 INFO L93 Difference]: Finished difference Result 22793 states and 25991 transitions. [2021-02-21 16:08:44,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:44,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-21 16:08:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:44,495 INFO L225 Difference]: With dead ends: 22793 [2021-02-21 16:08:44,495 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 16:08:44,527 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 [2021-02-21 16:08:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 16:08:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 16:08:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 16:08:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 16:08:44,528 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-02-21 16:08:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:44,528 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 16:08:44,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 16:08:44,529 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 16:08:44,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-02-21 16:08:44,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 16:09:00,415 WARN L202 SmtUtils]: Spent 15.86 s on a formula simplification. DAG size of input: 2122 DAG size of output: 32 [2021-02-21 16:09:00,459 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 16:09:00,460 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 16:09:00,460 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 16:09:00,460 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:09:00,460 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|)) [2021-02-21 16:09:00,460 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:09:00,461 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:09:00,461 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 16:09:00,461 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 16:09:00,461 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:09:00,461 INFO L189 CegarLoopUtils]: For program point L126-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,461 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 151) no Hoare annotation was computed. [2021-02-21 16:09:00,461 INFO L189 CegarLoopUtils]: For program point L102(line 102) no Hoare annotation was computed. [2021-02-21 16:09:00,461 INFO L189 CegarLoopUtils]: For program point L127(line 127) no Hoare annotation was computed. [2021-02-21 16:09:00,461 INFO L189 CegarLoopUtils]: For program point L111-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,462 INFO L189 CegarLoopUtils]: For program point L136-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,462 INFO L189 CegarLoopUtils]: For program point L95-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,462 INFO L189 CegarLoopUtils]: For program point L87-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,462 INFO L189 CegarLoopUtils]: For program point L112(line 112) no Hoare annotation was computed. [2021-02-21 16:09:00,462 INFO L189 CegarLoopUtils]: For program point L79-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,462 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 151) no Hoare annotation was computed. [2021-02-21 16:09:00,462 INFO L189 CegarLoopUtils]: For program point L137(line 137) no Hoare annotation was computed. [2021-02-21 16:09:00,462 INFO L189 CegarLoopUtils]: For program point L71-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,463 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 149) no Hoare annotation was computed. [2021-02-21 16:09:00,463 INFO L189 CegarLoopUtils]: For program point L63(lines 63 65) no Hoare annotation was computed. [2021-02-21 16:09:00,463 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 151) the Hoare annotation is: true [2021-02-21 16:09:00,463 INFO L189 CegarLoopUtils]: For program point L63-2(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,463 INFO L189 CegarLoopUtils]: For program point L121-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,463 INFO L189 CegarLoopUtils]: For program point L122(line 122) no Hoare annotation was computed. [2021-02-21 16:09:00,463 INFO L192 CegarLoopUtils]: At program point L147(lines 7 151) the Hoare annotation is: true [2021-02-21 16:09:00,463 INFO L189 CegarLoopUtils]: For program point L106-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,464 INFO L189 CegarLoopUtils]: For program point L40(lines 40 42) no Hoare annotation was computed. [2021-02-21 16:09:00,464 INFO L189 CegarLoopUtils]: For program point L131-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,464 INFO L189 CegarLoopUtils]: For program point L107(line 107) no Hoare annotation was computed. [2021-02-21 16:09:00,464 INFO L189 CegarLoopUtils]: For program point L132(line 132) no Hoare annotation was computed. [2021-02-21 16:09:00,464 INFO L189 CegarLoopUtils]: For program point L91-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,464 INFO L189 CegarLoopUtils]: For program point L116-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,464 INFO L189 CegarLoopUtils]: For program point L83-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,464 INFO L192 CegarLoopUtils]: At program point L141-1(lines 38 146) the Hoare annotation is: true [2021-02-21 16:09:00,464 INFO L189 CegarLoopUtils]: For program point L75-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,465 INFO L189 CegarLoopUtils]: For program point L67-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,465 INFO L189 CegarLoopUtils]: For program point L117(line 117) no Hoare annotation was computed. [2021-02-21 16:09:00,465 INFO L189 CegarLoopUtils]: For program point L142(line 142) no Hoare annotation was computed. [2021-02-21 16:09:00,465 INFO L185 CegarLoopUtils]: At program point L142-1(lines 7 151) the Hoare annotation is: false [2021-02-21 16:09:00,465 INFO L189 CegarLoopUtils]: For program point L101-1(lines 38 146) no Hoare annotation was computed. [2021-02-21 16:09:00,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:09:00 BoogieIcfgContainer [2021-02-21 16:09:00,480 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:09:00,481 INFO L168 Benchmark]: Toolchain (without parser) took 26616.51 ms. Allocated memory was 155.2 MB in the beginning and 643.8 MB in the end (delta: 488.6 MB). Free memory was 129.8 MB in the beginning and 266.4 MB in the end (delta: -136.6 MB). Peak memory consumption was 439.2 MB. Max. memory is 8.0 GB. [2021-02-21 16:09:00,482 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 155.2 MB. Free memory is still 137.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:09:00,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.89 ms. Allocated memory is still 155.2 MB. Free memory was 128.7 MB in the beginning and 118.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 16:09:00,482 INFO L168 Benchmark]: Boogie Preprocessor took 46.05 ms. Allocated memory is still 155.2 MB. Free memory was 118.5 MB in the beginning and 116.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:09:00,483 INFO L168 Benchmark]: RCFGBuilder took 483.21 ms. Allocated memory is still 155.2 MB. Free memory was 116.8 MB in the beginning and 126.5 MB in the end (delta: -9.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:09:00,483 INFO L168 Benchmark]: TraceAbstraction took 25777.73 ms. Allocated memory was 155.2 MB in the beginning and 643.8 MB in the end (delta: 488.6 MB). Free memory was 125.8 MB in the beginning and 266.4 MB in the end (delta: -140.6 MB). Peak memory consumption was 434.3 MB. Max. memory is 8.0 GB. [2021-02-21 16:09:00,484 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 155.2 MB. Free memory is still 137.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 290.89 ms. Allocated memory is still 155.2 MB. Free memory was 128.7 MB in the beginning and 118.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.05 ms. Allocated memory is still 155.2 MB. Free memory was 118.5 MB in the beginning and 116.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 483.21 ms. Allocated memory is still 155.2 MB. Free memory was 116.8 MB in the beginning and 126.5 MB in the end (delta: -9.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 25777.73 ms. Allocated memory was 155.2 MB in the beginning and 643.8 MB in the end (delta: 488.6 MB). Free memory was 125.8 MB in the beginning and 266.4 MB in the end (delta: -140.6 MB). Peak memory consumption was 434.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 149]: 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: 38]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.7s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 15.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1943 SDtfs, 2859 SDslu, 154 SDs, 0 SdLazy, 1415 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10249occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.0s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 13725542 FormulaSimplificationTreeSizeReduction, 15.8s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 606 NumberOfCodeBlocks, 606 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 581 ConstructedInterpolants, 0 QuantifiedInterpolants, 43466 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 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...