/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/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:44:25,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:44:25,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:44:26,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:44:26,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:44:26,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:44:26,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:44:26,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:44:26,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:44:26,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:44:26,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:44:26,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:44:26,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:44:26,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:44:26,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:44:26,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:44:26,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:44:26,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:44:26,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:44:26,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:44:26,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:44:26,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:44:26,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:44:26,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:44:26,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:44:26,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:44:26,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:44:26,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:44:26,085 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 16:44:26,111 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:44:26,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:44:26,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:44:26,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:44:26,113 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:44:26,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:44:26,113 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:44:26,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:44:26,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:44:26,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:44:26,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:44:26,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:44:26,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:44:26,115 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:44:26,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:44:26,115 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:44:26,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:44:26,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:44:26,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:44:26,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:44:26,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:44:26,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:44:26,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:44:26,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:44:26,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:44:26,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:44:26,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:44:26,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:44:26,118 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:44:26,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:44:26,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:44:26,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:44:26,497 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:44:26,497 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:44:26,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-02-21 16:44:26,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/795bba71b/9d081685c14a457cba2887038e1d1f88/FLAG8b08a73b0 [2021-02-21 16:44:27,526 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:44:27,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-02-21 16:44:27,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/795bba71b/9d081685c14a457cba2887038e1d1f88/FLAG8b08a73b0 [2021-02-21 16:44:28,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/795bba71b/9d081685c14a457cba2887038e1d1f88 [2021-02-21 16:44:28,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:44:28,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:44:28,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:44:28,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:44:28,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:44:28,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:44:28" (1/1) ... [2021-02-21 16:44:28,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d21f036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:44:28, skipping insertion in model container [2021-02-21 16:44:28,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:44:28" (1/1) ... [2021-02-21 16:44:28,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:44:28,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:44:29,316 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[49609,49622] [2021-02-21 16:44:29,439 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[55371,55384] [2021-02-21 16:44:29,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:44:29,763 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:44:30,373 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[49609,49622] [2021-02-21 16:44:30,467 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[55371,55384] [2021-02-21 16:44:30,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:44:30,768 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:44:30,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:44:30 WrapperNode [2021-02-21 16:44:30,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:44:30,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:44:30,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:44:30,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:44:30,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:44:30" (1/1) ... [2021-02-21 16:44:30,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:44:30" (1/1) ... [2021-02-21 16:44:30,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:44:30" (1/1) ... [2021-02-21 16:44:30,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:44:30" (1/1) ... [2021-02-21 16:44:30,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:44:30" (1/1) ... [2021-02-21 16:44:30,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:44:30" (1/1) ... [2021-02-21 16:44:31,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:44:30" (1/1) ... [2021-02-21 16:44:31,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:44:31,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:44:31,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:44:31,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:44:31,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:44:30" (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 16:44:31,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:44:31,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:44:31,127 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:44:31,127 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 16:44:31,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:44:31,127 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:44:31,128 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:44:31,128 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:44:31,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:44:31,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-21 16:44:31,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-02-21 16:44:31,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 16:44:31,132 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-21 16:44:31,132 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 16:44:31,132 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-21 16:44:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-21 16:44:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-21 16:44:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-21 16:44:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-21 16:44:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-21 16:44:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2021-02-21 16:44:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-21 16:44:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-21 16:44:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:44:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:44:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:44:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:44:31,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:44:31,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:44:31,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:44:35,073 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:44:35,073 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:44:35,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:44:35 BoogieIcfgContainer [2021-02-21 16:44:35,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:44:35,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:44:35,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:44:35,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:44:35,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:44:28" (1/3) ... [2021-02-21 16:44:35,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17533c6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:44:35, skipping insertion in model container [2021-02-21 16:44:35,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:44:30" (2/3) ... [2021-02-21 16:44:35,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17533c6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:44:35, skipping insertion in model container [2021-02-21 16:44:35,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:44:35" (3/3) ... [2021-02-21 16:44:35,085 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-02-21 16:44:35,092 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:44:35,098 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-02-21 16:44:35,116 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-02-21 16:44:35,152 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:44:35,152 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:44:35,152 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:44:35,153 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:44:35,153 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:44:35,153 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:44:35,153 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:44:35,153 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:44:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2021-02-21 16:44:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2021-02-21 16:44:35,254 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:44:35,255 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:44:35,256 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:44:35,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:44:35,270 INFO L82 PathProgramCache]: Analyzing trace with hash -66589577, now seen corresponding path program 1 times [2021-02-21 16:44:35,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:44:35,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443223349] [2021-02-21 16:44:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:44:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:44:37,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:44:37,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:44:37,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:44:37,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:44:37,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:44:37,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:44:37,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:44:37,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:44:38,160 WARN L202 SmtUtils]: Spent 1000.00 ms on a formula simplification that was a NOOP. DAG size: 415 [2021-02-21 16:44:38,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:44:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:44:38,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:44:38,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:44:38,529 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 16:44:38,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443223349] [2021-02-21 16:44:38,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:44:38,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:44:38,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564858893] [2021-02-21 16:44:38,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:44:38,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:44:38,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:44:38,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:44:38,554 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 5 states. [2021-02-21 16:44:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:44:54,491 INFO L93 Difference]: Finished difference Result 4125 states and 7467 transitions. [2021-02-21 16:44:54,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 16:44:54,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 473 [2021-02-21 16:44:54,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:44:54,529 INFO L225 Difference]: With dead ends: 4125 [2021-02-21 16:44:54,529 INFO L226 Difference]: Without dead ends: 2741 [2021-02-21 16:44:54,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:44:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-02-21 16:44:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2688. [2021-02-21 16:44:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2688 states. [2021-02-21 16:44:54,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 4398 transitions. [2021-02-21 16:44:54,794 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 4398 transitions. Word has length 473 [2021-02-21 16:44:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:44:54,799 INFO L480 AbstractCegarLoop]: Abstraction has 2688 states and 4398 transitions. [2021-02-21 16:44:54,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:44:54,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 4398 transitions. [2021-02-21 16:44:54,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-02-21 16:44:54,817 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:44:54,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:44:54,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:44:54,819 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:44:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:44:54,821 INFO L82 PathProgramCache]: Analyzing trace with hash -359431682, now seen corresponding path program 1 times [2021-02-21 16:44:54,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:44:54,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733529389] [2021-02-21 16:44:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:44:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:44:55,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:44:55,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:44:55,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:44:55,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:44:55,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:44:55,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:44:56,428 WARN L202 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 415 [2021-02-21 16:44:56,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:44:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:44:56,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:44:56,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:44:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:44:56,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733529389] [2021-02-21 16:44:56,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:44:56,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:44:56,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660475106] [2021-02-21 16:44:56,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:44:56,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:44:56,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:44:56,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:44:56,754 INFO L87 Difference]: Start difference. First operand 2688 states and 4398 transitions. Second operand 4 states. [2021-02-21 16:45:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:45:14,139 INFO L93 Difference]: Finished difference Result 7793 states and 12713 transitions. [2021-02-21 16:45:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:45:14,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2021-02-21 16:45:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:45:14,169 INFO L225 Difference]: With dead ends: 7793 [2021-02-21 16:45:14,170 INFO L226 Difference]: Without dead ends: 5319 [2021-02-21 16:45:14,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:45:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2021-02-21 16:45:14,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5268. [2021-02-21 16:45:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2021-02-21 16:45:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 8596 transitions. [2021-02-21 16:45:14,380 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 8596 transitions. Word has length 475 [2021-02-21 16:45:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:45:14,381 INFO L480 AbstractCegarLoop]: Abstraction has 5268 states and 8596 transitions. [2021-02-21 16:45:14,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:45:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 8596 transitions. [2021-02-21 16:45:14,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-02-21 16:45:14,400 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:45:14,401 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:45:14,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:45:14,401 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:45:14,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:45:14,402 INFO L82 PathProgramCache]: Analyzing trace with hash -262688380, now seen corresponding path program 1 times [2021-02-21 16:45:14,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:45:14,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750091802] [2021-02-21 16:45:14,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:45:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:45:14,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:14,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:14,577 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:14,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:45:14,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:14,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:15,715 WARN L202 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 415 [2021-02-21 16:45:15,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:45:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:45:15,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:15,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:15,995 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 16:45:15,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750091802] [2021-02-21 16:45:15,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:45:15,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:45:15,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080228028] [2021-02-21 16:45:16,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:45:16,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:45:16,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:45:16,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:45:16,004 INFO L87 Difference]: Start difference. First operand 5268 states and 8596 transitions. Second operand 4 states. [2021-02-21 16:45:33,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:45:33,056 INFO L93 Difference]: Finished difference Result 15707 states and 25620 transitions. [2021-02-21 16:45:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:45:33,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2021-02-21 16:45:33,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:45:33,106 INFO L225 Difference]: With dead ends: 15707 [2021-02-21 16:45:33,106 INFO L226 Difference]: Without dead ends: 10491 [2021-02-21 16:45:33,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:45:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2021-02-21 16:45:33,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 5315. [2021-02-21 16:45:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5315 states. [2021-02-21 16:45:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 8670 transitions. [2021-02-21 16:45:33,389 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 8670 transitions. Word has length 476 [2021-02-21 16:45:33,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:45:33,389 INFO L480 AbstractCegarLoop]: Abstraction has 5315 states and 8670 transitions. [2021-02-21 16:45:33,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:45:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 8670 transitions. [2021-02-21 16:45:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-02-21 16:45:33,412 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:45:33,413 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:45:33,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:45:33,413 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:45:33,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:45:33,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2055678045, now seen corresponding path program 1 times [2021-02-21 16:45:33,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:45:33,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519816548] [2021-02-21 16:45:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:45:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:45:33,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:33,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:33,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:33,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:45:33,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:33,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:34,881 WARN L202 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 415 [2021-02-21 16:45:34,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:45:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:45:34,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:34,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:45:35,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519816548] [2021-02-21 16:45:35,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:45:35,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:45:35,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146226683] [2021-02-21 16:45:35,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:45:35,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:45:35,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:45:35,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:45:35,197 INFO L87 Difference]: Start difference. First operand 5315 states and 8670 transitions. Second operand 4 states. [2021-02-21 16:45:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:45:52,484 INFO L93 Difference]: Finished difference Result 15285 states and 24839 transitions. [2021-02-21 16:45:52,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:45:52,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2021-02-21 16:45:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:45:52,531 INFO L225 Difference]: With dead ends: 15285 [2021-02-21 16:45:52,531 INFO L226 Difference]: Without dead ends: 10369 [2021-02-21 16:45:52,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:45:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10369 states. [2021-02-21 16:45:52,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10369 to 10320. [2021-02-21 16:45:52,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10320 states. [2021-02-21 16:45:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10320 states to 10320 states and 16752 transitions. [2021-02-21 16:45:52,983 INFO L78 Accepts]: Start accepts. Automaton has 10320 states and 16752 transitions. Word has length 477 [2021-02-21 16:45:52,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:45:52,984 INFO L480 AbstractCegarLoop]: Abstraction has 10320 states and 16752 transitions. [2021-02-21 16:45:52,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:45:52,984 INFO L276 IsEmpty]: Start isEmpty. Operand 10320 states and 16752 transitions. [2021-02-21 16:45:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-02-21 16:45:53,008 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:45:53,008 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:45:53,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:45:53,009 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:45:53,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:45:53,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1314173246, now seen corresponding path program 1 times [2021-02-21 16:45:53,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:45:53,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81115581] [2021-02-21 16:45:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:45:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:45:53,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:53,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:53,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:53,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:45:53,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:53,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:54,279 WARN L202 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 415 [2021-02-21 16:45:54,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:45:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:45:54,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:45:54,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:45:54,540 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 16:45:54,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81115581] [2021-02-21 16:45:54,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:45:54,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:45:54,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932328039] [2021-02-21 16:45:54,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:45:54,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:45:54,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:45:54,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:45:54,543 INFO L87 Difference]: Start difference. First operand 10320 states and 16752 transitions. Second operand 4 states. [2021-02-21 16:46:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:46:12,819 INFO L93 Difference]: Finished difference Result 30704 states and 49811 transitions. [2021-02-21 16:46:12,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:46:12,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2021-02-21 16:46:12,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:46:12,863 INFO L225 Difference]: With dead ends: 30704 [2021-02-21 16:46:12,863 INFO L226 Difference]: Without dead ends: 20528 [2021-02-21 16:46:12,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:12,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20528 states. [2021-02-21 16:46:13,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20528 to 10418. [2021-02-21 16:46:13,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10418 states. [2021-02-21 16:46:13,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10418 states to 10418 states and 16903 transitions. [2021-02-21 16:46:13,427 INFO L78 Accepts]: Start accepts. Automaton has 10418 states and 16903 transitions. Word has length 477 [2021-02-21 16:46:13,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:46:13,427 INFO L480 AbstractCegarLoop]: Abstraction has 10418 states and 16903 transitions. [2021-02-21 16:46:13,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:46:13,428 INFO L276 IsEmpty]: Start isEmpty. Operand 10418 states and 16903 transitions. [2021-02-21 16:46:13,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-02-21 16:46:13,450 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:46:13,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:46:13,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:46:13,451 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:46:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:46:13,451 INFO L82 PathProgramCache]: Analyzing trace with hash -2022249869, now seen corresponding path program 1 times [2021-02-21 16:46:13,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:46:13,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778327150] [2021-02-21 16:46:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:46:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:13,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:13,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:13,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:13,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:46:13,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:13,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:14,802 WARN L202 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 415 [2021-02-21 16:46:14,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:46:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:14,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:14,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:15,010 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 16:46:15,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778327150] [2021-02-21 16:46:15,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:46:15,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:46:15,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781480724] [2021-02-21 16:46:15,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:46:15,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:46:15,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:46:15,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:15,013 INFO L87 Difference]: Start difference. First operand 10418 states and 16903 transitions. Second operand 4 states. [2021-02-21 16:46:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:46:33,617 INFO L93 Difference]: Finished difference Result 30839 states and 49992 transitions. [2021-02-21 16:46:33,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:46:33,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2021-02-21 16:46:33,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:46:33,658 INFO L225 Difference]: With dead ends: 30839 [2021-02-21 16:46:33,658 INFO L226 Difference]: Without dead ends: 20645 [2021-02-21 16:46:33,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20645 states. [2021-02-21 16:46:34,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20645 to 10535. [2021-02-21 16:46:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10535 states. [2021-02-21 16:46:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10535 states to 10535 states and 17049 transitions. [2021-02-21 16:46:34,343 INFO L78 Accepts]: Start accepts. Automaton has 10535 states and 17049 transitions. Word has length 478 [2021-02-21 16:46:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:46:34,343 INFO L480 AbstractCegarLoop]: Abstraction has 10535 states and 17049 transitions. [2021-02-21 16:46:34,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:46:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 10535 states and 17049 transitions. [2021-02-21 16:46:34,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-02-21 16:46:34,363 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:46:34,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:46:34,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:46:34,365 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:46:34,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:46:34,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1784786648, now seen corresponding path program 1 times [2021-02-21 16:46:34,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:46:34,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993529228] [2021-02-21 16:46:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:46:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:34,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:34,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:34,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:34,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:46:34,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:34,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:35,777 WARN L202 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 415 [2021-02-21 16:46:35,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:46:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:35,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:35,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:36,074 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 16:46:36,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993529228] [2021-02-21 16:46:36,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:46:36,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:46:36,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161252484] [2021-02-21 16:46:36,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:46:36,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:46:36,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:46:36,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:36,076 INFO L87 Difference]: Start difference. First operand 10535 states and 17049 transitions. Second operand 4 states. [2021-02-21 16:46:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:46:54,990 INFO L93 Difference]: Finished difference Result 29921 states and 48292 transitions. [2021-02-21 16:46:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:46:54,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2021-02-21 16:46:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:46:55,024 INFO L225 Difference]: With dead ends: 29921 [2021-02-21 16:46:55,024 INFO L226 Difference]: Without dead ends: 20355 [2021-02-21 16:46:55,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:46:55,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2021-02-21 16:46:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 20308. [2021-02-21 16:46:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20308 states. [2021-02-21 16:46:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20308 states to 20308 states and 32714 transitions. [2021-02-21 16:46:55,841 INFO L78 Accepts]: Start accepts. Automaton has 20308 states and 32714 transitions. Word has length 479 [2021-02-21 16:46:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:46:55,842 INFO L480 AbstractCegarLoop]: Abstraction has 20308 states and 32714 transitions. [2021-02-21 16:46:55,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:46:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 20308 states and 32714 transitions. [2021-02-21 16:46:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-02-21 16:46:55,883 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:46:55,883 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:46:55,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:46:55,884 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:46:55,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:46:55,884 INFO L82 PathProgramCache]: Analyzing trace with hash 881610347, now seen corresponding path program 1 times [2021-02-21 16:46:55,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:46:55,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125927268] [2021-02-21 16:46:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:46:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:56,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:56,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:56,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:56,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:46:56,838 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-21 16:46:56,840 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-21 16:46:56,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:56,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:46:56,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:56,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:58,056 WARN L202 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 415 [2021-02-21 16:46:58,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:46:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:46:58,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:46:58,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:46:58,444 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 16:46:58,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125927268] [2021-02-21 16:46:58,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:46:58,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:46:58,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366904991] [2021-02-21 16:46:58,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:46:58,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:46:58,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:46:58,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:46:58,453 INFO L87 Difference]: Start difference. First operand 20308 states and 32714 transitions. Second operand 6 states. [2021-02-21 16:47:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:47:15,111 INFO L93 Difference]: Finished difference Result 59491 states and 95816 transitions. [2021-02-21 16:47:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:47:15,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 479 [2021-02-21 16:47:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:47:15,159 INFO L225 Difference]: With dead ends: 59491 [2021-02-21 16:47:15,160 INFO L226 Difference]: Without dead ends: 39401 [2021-02-21 16:47:15,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:47:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39401 states. [2021-02-21 16:47:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39401 to 39359. [2021-02-21 16:47:17,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39359 states. [2021-02-21 16:47:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39359 states to 39359 states and 63096 transitions. [2021-02-21 16:47:17,135 INFO L78 Accepts]: Start accepts. Automaton has 39359 states and 63096 transitions. Word has length 479 [2021-02-21 16:47:17,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:47:17,135 INFO L480 AbstractCegarLoop]: Abstraction has 39359 states and 63096 transitions. [2021-02-21 16:47:17,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:47:17,136 INFO L276 IsEmpty]: Start isEmpty. Operand 39359 states and 63096 transitions. [2021-02-21 16:47:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-02-21 16:47:17,176 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:47:17,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:47:17,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:47:17,176 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:47:17,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:47:17,177 INFO L82 PathProgramCache]: Analyzing trace with hash -634427698, now seen corresponding path program 1 times [2021-02-21 16:47:17,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:47:17,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077798337] [2021-02-21 16:47:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:47:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:17,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:17,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:17,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:17,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:47:17,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:17,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:18,816 WARN L202 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 415 [2021-02-21 16:47:18,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:47:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:18,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:18,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:19,270 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 16:47:19,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077798337] [2021-02-21 16:47:19,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:47:19,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:47:19,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879007077] [2021-02-21 16:47:19,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:47:19,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:47:19,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:47:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:47:19,273 INFO L87 Difference]: Start difference. First operand 39359 states and 63096 transitions. Second operand 4 states. [2021-02-21 16:47:41,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:47:41,267 INFO L93 Difference]: Finished difference Result 115406 states and 184841 transitions. [2021-02-21 16:47:41,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:47:41,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2021-02-21 16:47:41,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:47:41,357 INFO L225 Difference]: With dead ends: 115406 [2021-02-21 16:47:41,357 INFO L226 Difference]: Without dead ends: 77589 [2021-02-21 16:47:41,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:47:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-02-21 16:47:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 77551. [2021-02-21 16:47:45,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77551 states. [2021-02-21 16:47:45,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77551 states to 77551 states and 123852 transitions. [2021-02-21 16:47:45,242 INFO L78 Accepts]: Start accepts. Automaton has 77551 states and 123852 transitions. Word has length 481 [2021-02-21 16:47:45,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:47:45,242 INFO L480 AbstractCegarLoop]: Abstraction has 77551 states and 123852 transitions. [2021-02-21 16:47:45,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:47:45,243 INFO L276 IsEmpty]: Start isEmpty. Operand 77551 states and 123852 transitions. [2021-02-21 16:47:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2021-02-21 16:47:45,356 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:47:45,357 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:47:45,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 16:47:45,357 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:47:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:47:45,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1874329526, now seen corresponding path program 1 times [2021-02-21 16:47:45,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:47:45,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854015715] [2021-02-21 16:47:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:47:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:46,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:46,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:46,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:46,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:47:46,102 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-21 16:47:46,103 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-21 16:47:46,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:46,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:47:46,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:46,148 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:47,642 WARN L202 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 415 [2021-02-21 16:47:47,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:47:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:47:47,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:47:47,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:47:48,029 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 16:47:48,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854015715] [2021-02-21 16:47:48,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:47:48,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:47:48,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584718569] [2021-02-21 16:47:48,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:47:48,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:47:48,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:47:48,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:47:48,032 INFO L87 Difference]: Start difference. First operand 77551 states and 123852 transitions. Second operand 6 states. [2021-02-21 16:48:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:48:10,132 INFO L93 Difference]: Finished difference Result 229838 states and 367077 transitions. [2021-02-21 16:48:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:48:10,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 483 [2021-02-21 16:48:10,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:48:10,331 INFO L225 Difference]: With dead ends: 229838 [2021-02-21 16:48:10,331 INFO L226 Difference]: Without dead ends: 152624 [2021-02-21 16:48:10,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:48:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152624 states. [2021-02-21 16:48:18,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152624 to 152593. [2021-02-21 16:48:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152593 states. [2021-02-21 16:48:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152593 states to 152593 states and 242617 transitions. [2021-02-21 16:48:18,279 INFO L78 Accepts]: Start accepts. Automaton has 152593 states and 242617 transitions. Word has length 483 [2021-02-21 16:48:18,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:48:18,279 INFO L480 AbstractCegarLoop]: Abstraction has 152593 states and 242617 transitions. [2021-02-21 16:48:18,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:48:18,280 INFO L276 IsEmpty]: Start isEmpty. Operand 152593 states and 242617 transitions. [2021-02-21 16:48:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-02-21 16:48:18,817 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:48:18,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:48:18,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 16:48:18,818 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:48:18,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:48:18,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1776583307, now seen corresponding path program 1 times [2021-02-21 16:48:18,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:48:18,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872173738] [2021-02-21 16:48:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:48:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:19,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:19,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:19,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:19,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:48:19,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:19,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:48:19,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:19,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:20,770 WARN L202 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 415 [2021-02-21 16:48:20,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:48:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:20,790 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:20,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:21,260 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 16:48:21,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872173738] [2021-02-21 16:48:21,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:48:21,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:48:21,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819217420] [2021-02-21 16:48:21,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:48:21,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:48:21,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:48:21,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:48:21,263 INFO L87 Difference]: Start difference. First operand 152593 states and 242617 transitions. Second operand 5 states. [2021-02-21 16:48:51,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:48:51,073 INFO L93 Difference]: Finished difference Result 453319 states and 720695 transitions. [2021-02-21 16:48:51,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:48:51,074 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2021-02-21 16:48:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:48:51,689 INFO L225 Difference]: With dead ends: 453319 [2021-02-21 16:48:51,690 INFO L226 Difference]: Without dead ends: 301577 [2021-02-21 16:48:51,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:48:51,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301577 states. [2021-02-21 16:49:07,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301577 to 300867. [2021-02-21 16:49:07,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300867 states. [2021-02-21 16:49:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300867 states to 300867 states and 476251 transitions. [2021-02-21 16:49:07,989 INFO L78 Accepts]: Start accepts. Automaton has 300867 states and 476251 transitions. Word has length 485 [2021-02-21 16:49:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:49:07,990 INFO L480 AbstractCegarLoop]: Abstraction has 300867 states and 476251 transitions. [2021-02-21 16:49:07,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:49:07,990 INFO L276 IsEmpty]: Start isEmpty. Operand 300867 states and 476251 transitions. [2021-02-21 16:49:08,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-02-21 16:49:08,309 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:49:08,309 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:49:08,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 16:49:08,310 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:49:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:49:08,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1016249692, now seen corresponding path program 1 times [2021-02-21 16:49:08,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:49:08,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144517861] [2021-02-21 16:49:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:49:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:09,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:09,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:09,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:09,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:49:09,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:09,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:10,120 WARN L202 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 415 [2021-02-21 16:49:10,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:49:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:10,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:10,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:10,461 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 16:49:10,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144517861] [2021-02-21 16:49:10,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:49:10,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:49:10,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915966999] [2021-02-21 16:49:10,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:49:10,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:49:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:49:10,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:49:10,472 INFO L87 Difference]: Start difference. First operand 300867 states and 476251 transitions. Second operand 4 states. [2021-02-21 16:49:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:49:58,351 INFO L93 Difference]: Finished difference Result 888823 states and 1405407 transitions. [2021-02-21 16:49:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:49:58,352 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2021-02-21 16:49:58,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:49:59,643 INFO L225 Difference]: With dead ends: 888823 [2021-02-21 16:49:59,644 INFO L226 Difference]: Without dead ends: 595793 [2021-02-21 16:49:59,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:50:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595793 states. [2021-02-21 16:50:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595793 to 595083. [2021-02-21 16:50:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595083 states. [2021-02-21 16:50:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595083 states to 595083 states and 938047 transitions. [2021-02-21 16:50:36,160 INFO L78 Accepts]: Start accepts. Automaton has 595083 states and 938047 transitions. Word has length 487 [2021-02-21 16:50:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:50:36,160 INFO L480 AbstractCegarLoop]: Abstraction has 595083 states and 938047 transitions. [2021-02-21 16:50:36,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:50:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 595083 states and 938047 transitions. [2021-02-21 16:50:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-02-21 16:50:37,343 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:50:37,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:50:37,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 16:50:37,344 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:50:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:50:37,344 INFO L82 PathProgramCache]: Analyzing trace with hash 608571970, now seen corresponding path program 1 times [2021-02-21 16:50:37,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:50:37,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281439456] [2021-02-21 16:50:37,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:50:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:37,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:37,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:37,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:37,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:50:37,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:37,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:38,853 WARN L202 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 415 [2021-02-21 16:50:38,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:50:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:38,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:38,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:39,069 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 16:50:39,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281439456] [2021-02-21 16:50:39,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:50:39,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:50:39,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339590652] [2021-02-21 16:50:39,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:50:39,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:50:39,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:50:39,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:50:39,071 INFO L87 Difference]: Start difference. First operand 595083 states and 938047 transitions. Second operand 4 states. [2021-02-21 16:52:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:52:01,007 INFO L93 Difference]: Finished difference Result 1769085 states and 2785919 transitions. [2021-02-21 16:52:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:52:01,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2021-02-21 16:52:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:52:03,591 INFO L225 Difference]: With dead ends: 1769085 [2021-02-21 16:52:03,591 INFO L226 Difference]: Without dead ends: 1176139 [2021-02-21 16:52:04,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:52:05,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176139 states.