/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 17:41:17,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:41:17,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:41:17,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:41:17,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:41:17,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:41:17,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:41:17,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:41:17,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:41:17,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:41:17,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:41:17,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:41:17,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:41:17,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:41:17,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:41:17,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:41:17,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:41:17,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:41:17,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:41:17,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:41:17,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 17:41:17,607 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:41:17,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:41:17,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:41:17,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:41:17,612 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:41:17,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:41:17,613 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:41:17,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:41:17,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:41:17,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:41:17,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:41:17,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:41:17,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:41:17,614 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:41:17,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:41:17,614 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:41:17,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:41:17,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:41:17,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:41:17,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:41:17,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:41:17,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:41:17,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:41:17,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:41:17,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:41:17,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:41:17,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:41:17,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:41:17,619 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:41:18,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:41:18,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:41:18,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:41:18,103 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:41:18,103 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:41:18,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2021-02-19 17:41:18,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9c823e8/0e34971b5df045a9a6c16ae510a52022/FLAGe0de32d1c [2021-02-19 17:41:18,811 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:41:18,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c [2021-02-19 17:41:18,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9c823e8/0e34971b5df045a9a6c16ae510a52022/FLAGe0de32d1c [2021-02-19 17:41:19,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9c823e8/0e34971b5df045a9a6c16ae510a52022 [2021-02-19 17:41:19,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:41:19,158 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:41:19,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:41:19,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:41:19,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:41:19,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:41:19" (1/1) ... [2021-02-19 17:41:19,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55aeea9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:19, skipping insertion in model container [2021-02-19 17:41:19,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:41:19" (1/1) ... [2021-02-19 17:41:19,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:41:19,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:41:19,371 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c[3218,3231] [2021-02-19 17:41:19,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:41:19,388 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:41:19,415 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c[3218,3231] [2021-02-19 17:41:19,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:41:19,439 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:41:19,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:19 WrapperNode [2021-02-19 17:41:19,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:41:19,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:41:19,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:41:19,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:41:19,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:19" (1/1) ... [2021-02-19 17:41:19,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:19" (1/1) ... [2021-02-19 17:41:19,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:19" (1/1) ... [2021-02-19 17:41:19,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:19" (1/1) ... [2021-02-19 17:41:19,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:19" (1/1) ... [2021-02-19 17:41:19,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:19" (1/1) ... [2021-02-19 17:41:19,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:19" (1/1) ... [2021-02-19 17:41:19,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:41:19,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:41:19,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:41:19,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:41:19,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:41:19,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:41:19,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:41:19,735 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:41:19,735 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:41:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:41:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:41:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:41:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:41:19,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-19 17:41:19,737 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:41:19,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:41:19,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:41:19,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:41:19,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:41:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:41:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:41:20,195 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:41:20,195 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-19 17:41:20,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:41:20 BoogieIcfgContainer [2021-02-19 17:41:20,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:41:20,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:41:20,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:41:20,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:41:20,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:41:19" (1/3) ... [2021-02-19 17:41:20,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c68b003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:41:20, skipping insertion in model container [2021-02-19 17:41:20,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:19" (2/3) ... [2021-02-19 17:41:20,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c68b003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:41:20, skipping insertion in model container [2021-02-19 17:41:20,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:41:20" (3/3) ... [2021-02-19 17:41:20,209 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2021-02-19 17:41:20,219 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:41:20,225 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:41:20,262 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:41:20,312 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:41:20,312 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:41:20,312 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:41:20,313 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:41:20,313 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:41:20,313 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:41:20,313 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:41:20,313 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:41:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2021-02-19 17:41:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:41:20,341 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:20,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:20,342 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:20,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash 957163615, now seen corresponding path program 1 times [2021-02-19 17:41:20,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:20,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047733707] [2021-02-19 17:41:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:20,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:20,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:20,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:20,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047733707] [2021-02-19 17:41:20,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:20,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:20,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250532265] [2021-02-19 17:41:20,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:20,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:20,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:20,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:20,818 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2021-02-19 17:41:21,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:21,210 INFO L93 Difference]: Finished difference Result 76 states and 127 transitions. [2021-02-19 17:41:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:21,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-19 17:41:21,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:21,225 INFO L225 Difference]: With dead ends: 76 [2021-02-19 17:41:21,225 INFO L226 Difference]: Without dead ends: 61 [2021-02-19 17:41:21,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-19 17:41:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2021-02-19 17:41:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-19 17:41:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 74 transitions. [2021-02-19 17:41:21,297 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 74 transitions. Word has length 19 [2021-02-19 17:41:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:21,299 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 74 transitions. [2021-02-19 17:41:21,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 74 transitions. [2021-02-19 17:41:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:41:21,301 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:21,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:21,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:41:21,302 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:21,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1658228193, now seen corresponding path program 1 times [2021-02-19 17:41:21,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:21,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328614963] [2021-02-19 17:41:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:21,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:21,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328614963] [2021-02-19 17:41:21,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:21,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:21,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630467327] [2021-02-19 17:41:21,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:21,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:21,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:21,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:21,424 INFO L87 Difference]: Start difference. First operand 43 states and 74 transitions. Second operand 4 states. [2021-02-19 17:41:21,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:21,563 INFO L93 Difference]: Finished difference Result 98 states and 173 transitions. [2021-02-19 17:41:21,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:21,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-19 17:41:21,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:21,566 INFO L225 Difference]: With dead ends: 98 [2021-02-19 17:41:21,566 INFO L226 Difference]: Without dead ends: 61 [2021-02-19 17:41:21,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-19 17:41:21,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-02-19 17:41:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-19 17:41:21,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 102 transitions. [2021-02-19 17:41:21,580 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 102 transitions. Word has length 19 [2021-02-19 17:41:21,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:21,581 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 102 transitions. [2021-02-19 17:41:21,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:21,581 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 102 transitions. [2021-02-19 17:41:21,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:41:21,582 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:21,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:21,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:41:21,583 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:21,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:21,583 INFO L82 PathProgramCache]: Analyzing trace with hash -392484976, now seen corresponding path program 1 times [2021-02-19 17:41:21,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:21,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766385423] [2021-02-19 17:41:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:21,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:21,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766385423] [2021-02-19 17:41:21,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:21,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:21,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329708199] [2021-02-19 17:41:21,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:21,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:21,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:21,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:21,661 INFO L87 Difference]: Start difference. First operand 59 states and 102 transitions. Second operand 4 states. [2021-02-19 17:41:21,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:21,795 INFO L93 Difference]: Finished difference Result 91 states and 154 transitions. [2021-02-19 17:41:21,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:21,795 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-19 17:41:21,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:21,797 INFO L225 Difference]: With dead ends: 91 [2021-02-19 17:41:21,797 INFO L226 Difference]: Without dead ends: 64 [2021-02-19 17:41:21,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-19 17:41:21,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-02-19 17:41:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-19 17:41:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 104 transitions. [2021-02-19 17:41:21,810 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 104 transitions. Word has length 20 [2021-02-19 17:41:21,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:21,810 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 104 transitions. [2021-02-19 17:41:21,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 104 transitions. [2021-02-19 17:41:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:41:21,812 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:21,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:21,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:41:21,813 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:21,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:21,813 INFO L82 PathProgramCache]: Analyzing trace with hash -134319538, now seen corresponding path program 1 times [2021-02-19 17:41:21,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:21,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289045909] [2021-02-19 17:41:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:21,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:21,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289045909] [2021-02-19 17:41:21,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:21,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:21,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697447035] [2021-02-19 17:41:21,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:21,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:21,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:21,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:21,890 INFO L87 Difference]: Start difference. First operand 62 states and 104 transitions. Second operand 4 states. [2021-02-19 17:41:22,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:22,063 INFO L93 Difference]: Finished difference Result 166 states and 288 transitions. [2021-02-19 17:41:22,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:22,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-19 17:41:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:22,066 INFO L225 Difference]: With dead ends: 166 [2021-02-19 17:41:22,066 INFO L226 Difference]: Without dead ends: 113 [2021-02-19 17:41:22,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-19 17:41:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-02-19 17:41:22,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-02-19 17:41:22,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 189 transitions. [2021-02-19 17:41:22,081 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 189 transitions. Word has length 20 [2021-02-19 17:41:22,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:22,082 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 189 transitions. [2021-02-19 17:41:22,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:22,082 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 189 transitions. [2021-02-19 17:41:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:41:22,083 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:22,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:22,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:41:22,084 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:22,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:22,085 INFO L82 PathProgramCache]: Analyzing trace with hash -835384116, now seen corresponding path program 1 times [2021-02-19 17:41:22,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:22,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764247268] [2021-02-19 17:41:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:22,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:22,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764247268] [2021-02-19 17:41:22,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:22,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:22,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126386106] [2021-02-19 17:41:22,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:22,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:22,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:22,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:22,201 INFO L87 Difference]: Start difference. First operand 111 states and 189 transitions. Second operand 4 states. [2021-02-19 17:41:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:22,339 INFO L93 Difference]: Finished difference Result 143 states and 243 transitions. [2021-02-19 17:41:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:22,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-19 17:41:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:22,342 INFO L225 Difference]: With dead ends: 143 [2021-02-19 17:41:22,342 INFO L226 Difference]: Without dead ends: 141 [2021-02-19 17:41:22,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:22,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-19 17:41:22,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 111. [2021-02-19 17:41:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-02-19 17:41:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 187 transitions. [2021-02-19 17:41:22,355 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 187 transitions. Word has length 20 [2021-02-19 17:41:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:22,355 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 187 transitions. [2021-02-19 17:41:22,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 187 transitions. [2021-02-19 17:41:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:41:22,357 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:22,357 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] [2021-02-19 17:41:22,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:41:22,357 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:22,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:22,358 INFO L82 PathProgramCache]: Analyzing trace with hash 131275990, now seen corresponding path program 1 times [2021-02-19 17:41:22,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:22,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21779087] [2021-02-19 17:41:22,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:22,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:22,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21779087] [2021-02-19 17:41:22,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:22,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:22,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11271255] [2021-02-19 17:41:22,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:22,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:22,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:22,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:22,418 INFO L87 Difference]: Start difference. First operand 111 states and 187 transitions. Second operand 4 states. [2021-02-19 17:41:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:22,561 INFO L93 Difference]: Finished difference Result 203 states and 347 transitions. [2021-02-19 17:41:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:22,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-19 17:41:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:22,564 INFO L225 Difference]: With dead ends: 203 [2021-02-19 17:41:22,564 INFO L226 Difference]: Without dead ends: 201 [2021-02-19 17:41:22,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-02-19 17:41:22,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 151. [2021-02-19 17:41:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-02-19 17:41:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 253 transitions. [2021-02-19 17:41:22,578 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 253 transitions. Word has length 21 [2021-02-19 17:41:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:22,579 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 253 transitions. [2021-02-19 17:41:22,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 253 transitions. [2021-02-19 17:41:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:41:22,580 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:22,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:22,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 17:41:22,581 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:22,582 INFO L82 PathProgramCache]: Analyzing trace with hash 832340568, now seen corresponding path program 1 times [2021-02-19 17:41:22,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:22,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238358113] [2021-02-19 17:41:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:22,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:22,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238358113] [2021-02-19 17:41:22,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:22,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:22,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741784779] [2021-02-19 17:41:22,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:22,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:22,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:22,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:22,638 INFO L87 Difference]: Start difference. First operand 151 states and 253 transitions. Second operand 4 states. [2021-02-19 17:41:22,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:22,755 INFO L93 Difference]: Finished difference Result 351 states and 595 transitions. [2021-02-19 17:41:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:22,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-19 17:41:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:22,757 INFO L225 Difference]: With dead ends: 351 [2021-02-19 17:41:22,758 INFO L226 Difference]: Without dead ends: 209 [2021-02-19 17:41:22,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:22,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-02-19 17:41:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2021-02-19 17:41:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-02-19 17:41:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 343 transitions. [2021-02-19 17:41:22,772 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 343 transitions. Word has length 21 [2021-02-19 17:41:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:22,773 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 343 transitions. [2021-02-19 17:41:22,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 343 transitions. [2021-02-19 17:41:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:41:22,774 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:22,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:22,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 17:41:22,775 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:22,776 INFO L82 PathProgramCache]: Analyzing trace with hash -225196893, now seen corresponding path program 1 times [2021-02-19 17:41:22,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:22,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13764850] [2021-02-19 17:41:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:22,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:22,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13764850] [2021-02-19 17:41:22,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:22,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:22,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737166064] [2021-02-19 17:41:22,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:22,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:22,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:22,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:22,832 INFO L87 Difference]: Start difference. First operand 207 states and 343 transitions. Second operand 4 states. [2021-02-19 17:41:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:22,969 INFO L93 Difference]: Finished difference Result 313 states and 517 transitions. [2021-02-19 17:41:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:22,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-19 17:41:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:22,972 INFO L225 Difference]: With dead ends: 313 [2021-02-19 17:41:22,973 INFO L226 Difference]: Without dead ends: 215 [2021-02-19 17:41:22,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-02-19 17:41:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2021-02-19 17:41:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2021-02-19 17:41:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 347 transitions. [2021-02-19 17:41:22,994 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 347 transitions. Word has length 22 [2021-02-19 17:41:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:22,995 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 347 transitions. [2021-02-19 17:41:22,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 347 transitions. [2021-02-19 17:41:23,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:41:23,002 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:23,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:23,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 17:41:23,002 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:23,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:23,004 INFO L82 PathProgramCache]: Analyzing trace with hash 32968545, now seen corresponding path program 1 times [2021-02-19 17:41:23,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:23,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992878001] [2021-02-19 17:41:23,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:23,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:23,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992878001] [2021-02-19 17:41:23,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:23,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:23,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408842357] [2021-02-19 17:41:23,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:23,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:23,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:23,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:23,092 INFO L87 Difference]: Start difference. First operand 213 states and 347 transitions. Second operand 4 states. [2021-02-19 17:41:23,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:23,199 INFO L93 Difference]: Finished difference Result 381 states and 629 transitions. [2021-02-19 17:41:23,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:23,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-19 17:41:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:23,202 INFO L225 Difference]: With dead ends: 381 [2021-02-19 17:41:23,202 INFO L226 Difference]: Without dead ends: 379 [2021-02-19 17:41:23,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:23,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-02-19 17:41:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 297. [2021-02-19 17:41:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2021-02-19 17:41:23,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 475 transitions. [2021-02-19 17:41:23,218 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 475 transitions. Word has length 22 [2021-02-19 17:41:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:23,218 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 475 transitions. [2021-02-19 17:41:23,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 475 transitions. [2021-02-19 17:41:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:41:23,220 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:23,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:23,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 17:41:23,220 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:23,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:23,221 INFO L82 PathProgramCache]: Analyzing trace with hash 734033123, now seen corresponding path program 1 times [2021-02-19 17:41:23,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:23,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543620087] [2021-02-19 17:41:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:23,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:23,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543620087] [2021-02-19 17:41:23,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:23,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:23,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112413390] [2021-02-19 17:41:23,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:23,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:23,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:23,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:23,299 INFO L87 Difference]: Start difference. First operand 297 states and 475 transitions. Second operand 4 states. [2021-02-19 17:41:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:23,413 INFO L93 Difference]: Finished difference Result 685 states and 1101 transitions. [2021-02-19 17:41:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:23,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-19 17:41:23,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:23,416 INFO L225 Difference]: With dead ends: 685 [2021-02-19 17:41:23,416 INFO L226 Difference]: Without dead ends: 403 [2021-02-19 17:41:23,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:23,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-02-19 17:41:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 401. [2021-02-19 17:41:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2021-02-19 17:41:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 631 transitions. [2021-02-19 17:41:23,435 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 631 transitions. Word has length 22 [2021-02-19 17:41:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:23,435 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 631 transitions. [2021-02-19 17:41:23,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:23,436 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 631 transitions. [2021-02-19 17:41:23,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:41:23,437 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:23,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:23,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 17:41:23,437 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:23,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1022239949, now seen corresponding path program 1 times [2021-02-19 17:41:23,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:23,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822997039] [2021-02-19 17:41:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:23,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:23,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822997039] [2021-02-19 17:41:23,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:23,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:23,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106597391] [2021-02-19 17:41:23,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:23,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:23,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:23,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:23,487 INFO L87 Difference]: Start difference. First operand 401 states and 631 transitions. Second operand 4 states. [2021-02-19 17:41:23,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:23,615 INFO L93 Difference]: Finished difference Result 601 states and 941 transitions. [2021-02-19 17:41:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:23,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-19 17:41:23,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:23,618 INFO L225 Difference]: With dead ends: 601 [2021-02-19 17:41:23,618 INFO L226 Difference]: Without dead ends: 411 [2021-02-19 17:41:23,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-02-19 17:41:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 409. [2021-02-19 17:41:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2021-02-19 17:41:23,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 631 transitions. [2021-02-19 17:41:23,637 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 631 transitions. Word has length 23 [2021-02-19 17:41:23,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:23,637 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 631 transitions. [2021-02-19 17:41:23,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 631 transitions. [2021-02-19 17:41:23,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:41:23,639 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:23,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:23,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 17:41:23,639 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:23,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:23,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1280405387, now seen corresponding path program 1 times [2021-02-19 17:41:23,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:23,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15238049] [2021-02-19 17:41:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:23,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:23,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15238049] [2021-02-19 17:41:23,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:23,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:23,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590813318] [2021-02-19 17:41:23,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:23,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:23,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:23,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:23,718 INFO L87 Difference]: Start difference. First operand 409 states and 631 transitions. Second operand 4 states. [2021-02-19 17:41:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:23,833 INFO L93 Difference]: Finished difference Result 717 states and 1121 transitions. [2021-02-19 17:41:23,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:23,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-19 17:41:23,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:23,837 INFO L225 Difference]: With dead ends: 717 [2021-02-19 17:41:23,837 INFO L226 Difference]: Without dead ends: 715 [2021-02-19 17:41:23,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-02-19 17:41:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 585. [2021-02-19 17:41:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2021-02-19 17:41:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 879 transitions. [2021-02-19 17:41:23,872 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 879 transitions. Word has length 23 [2021-02-19 17:41:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:23,872 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 879 transitions. [2021-02-19 17:41:23,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 879 transitions. [2021-02-19 17:41:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:41:23,874 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:23,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:23,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 17:41:23,875 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:23,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:23,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1981469965, now seen corresponding path program 1 times [2021-02-19 17:41:23,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:23,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98552077] [2021-02-19 17:41:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:23,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:23,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98552077] [2021-02-19 17:41:23,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:23,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:23,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661255932] [2021-02-19 17:41:23,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:23,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:23,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:23,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:23,931 INFO L87 Difference]: Start difference. First operand 585 states and 879 transitions. Second operand 4 states. [2021-02-19 17:41:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:24,060 INFO L93 Difference]: Finished difference Result 1341 states and 2017 transitions. [2021-02-19 17:41:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:24,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-19 17:41:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:24,064 INFO L225 Difference]: With dead ends: 1341 [2021-02-19 17:41:24,065 INFO L226 Difference]: Without dead ends: 779 [2021-02-19 17:41:24,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:24,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-02-19 17:41:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 777. [2021-02-19 17:41:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777 states. [2021-02-19 17:41:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1143 transitions. [2021-02-19 17:41:24,099 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1143 transitions. Word has length 23 [2021-02-19 17:41:24,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:24,099 INFO L480 AbstractCegarLoop]: Abstraction has 777 states and 1143 transitions. [2021-02-19 17:41:24,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:24,099 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1143 transitions. [2021-02-19 17:41:24,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:41:24,101 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:24,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:24,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-19 17:41:24,101 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:24,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:24,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1038076728, now seen corresponding path program 1 times [2021-02-19 17:41:24,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:24,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356159329] [2021-02-19 17:41:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:24,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:24,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356159329] [2021-02-19 17:41:24,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:24,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:24,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631920094] [2021-02-19 17:41:24,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:24,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:24,155 INFO L87 Difference]: Start difference. First operand 777 states and 1143 transitions. Second operand 4 states. [2021-02-19 17:41:24,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:24,265 INFO L93 Difference]: Finished difference Result 1165 states and 1705 transitions. [2021-02-19 17:41:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:24,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-19 17:41:24,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:24,270 INFO L225 Difference]: With dead ends: 1165 [2021-02-19 17:41:24,270 INFO L226 Difference]: Without dead ends: 795 [2021-02-19 17:41:24,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-02-19 17:41:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 793. [2021-02-19 17:41:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2021-02-19 17:41:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1143 transitions. [2021-02-19 17:41:24,305 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1143 transitions. Word has length 24 [2021-02-19 17:41:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:24,306 INFO L480 AbstractCegarLoop]: Abstraction has 793 states and 1143 transitions. [2021-02-19 17:41:24,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1143 transitions. [2021-02-19 17:41:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:41:24,307 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:24,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:24,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-19 17:41:24,308 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:24,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:24,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1296242166, now seen corresponding path program 1 times [2021-02-19 17:41:24,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:24,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264638473] [2021-02-19 17:41:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:24,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:24,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264638473] [2021-02-19 17:41:24,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:24,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:24,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648131240] [2021-02-19 17:41:24,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:24,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:24,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:24,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:24,353 INFO L87 Difference]: Start difference. First operand 793 states and 1143 transitions. Second operand 4 states. [2021-02-19 17:41:24,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:24,495 INFO L93 Difference]: Finished difference Result 1357 states and 1977 transitions. [2021-02-19 17:41:24,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:24,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-19 17:41:24,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:24,501 INFO L225 Difference]: With dead ends: 1357 [2021-02-19 17:41:24,501 INFO L226 Difference]: Without dead ends: 1355 [2021-02-19 17:41:24,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:24,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-02-19 17:41:24,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1161. [2021-02-19 17:41:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1161 states. [2021-02-19 17:41:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1623 transitions. [2021-02-19 17:41:24,545 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1623 transitions. Word has length 24 [2021-02-19 17:41:24,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:24,545 INFO L480 AbstractCegarLoop]: Abstraction has 1161 states and 1623 transitions. [2021-02-19 17:41:24,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1623 transitions. [2021-02-19 17:41:24,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:41:24,547 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:24,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:24,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-19 17:41:24,548 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:24,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1997306744, now seen corresponding path program 1 times [2021-02-19 17:41:24,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:24,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333381292] [2021-02-19 17:41:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:24,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,590 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,591 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:24,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333381292] [2021-02-19 17:41:24,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:24,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:24,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428494284] [2021-02-19 17:41:24,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:24,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:24,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:24,594 INFO L87 Difference]: Start difference. First operand 1161 states and 1623 transitions. Second operand 4 states. [2021-02-19 17:41:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:24,728 INFO L93 Difference]: Finished difference Result 2637 states and 3673 transitions. [2021-02-19 17:41:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:24,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-19 17:41:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:24,735 INFO L225 Difference]: With dead ends: 2637 [2021-02-19 17:41:24,735 INFO L226 Difference]: Without dead ends: 1515 [2021-02-19 17:41:24,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:24,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-02-19 17:41:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1513. [2021-02-19 17:41:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1513 states. [2021-02-19 17:41:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2055 transitions. [2021-02-19 17:41:24,795 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2055 transitions. Word has length 24 [2021-02-19 17:41:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:24,795 INFO L480 AbstractCegarLoop]: Abstraction has 1513 states and 2055 transitions. [2021-02-19 17:41:24,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:24,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2055 transitions. [2021-02-19 17:41:24,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:41:24,798 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:24,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:24,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-19 17:41:24,799 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:24,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:24,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1529017218, now seen corresponding path program 1 times [2021-02-19 17:41:24,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:24,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156268295] [2021-02-19 17:41:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:24,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:24,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156268295] [2021-02-19 17:41:24,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:24,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:24,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120878664] [2021-02-19 17:41:24,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:24,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:24,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:24,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:24,843 INFO L87 Difference]: Start difference. First operand 1513 states and 2055 transitions. Second operand 4 states. [2021-02-19 17:41:24,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:24,976 INFO L93 Difference]: Finished difference Result 2269 states and 3065 transitions. [2021-02-19 17:41:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:24,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-19 17:41:24,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:24,983 INFO L225 Difference]: With dead ends: 2269 [2021-02-19 17:41:24,983 INFO L226 Difference]: Without dead ends: 1547 [2021-02-19 17:41:24,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:24,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-02-19 17:41:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1545. [2021-02-19 17:41:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1545 states. [2021-02-19 17:41:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2055 transitions. [2021-02-19 17:41:25,067 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2055 transitions. Word has length 25 [2021-02-19 17:41:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:25,067 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 2055 transitions. [2021-02-19 17:41:25,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2055 transitions. [2021-02-19 17:41:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:41:25,070 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:25,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:25,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-19 17:41:25,070 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:25,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:25,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1787182656, now seen corresponding path program 1 times [2021-02-19 17:41:25,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:25,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5298149] [2021-02-19 17:41:25,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:25,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:25,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:25,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:25,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5298149] [2021-02-19 17:41:25,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:25,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:25,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109363751] [2021-02-19 17:41:25,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:25,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:25,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:25,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:25,117 INFO L87 Difference]: Start difference. First operand 1545 states and 2055 transitions. Second operand 4 states. [2021-02-19 17:41:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:25,263 INFO L93 Difference]: Finished difference Result 2573 states and 3433 transitions. [2021-02-19 17:41:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:25,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-19 17:41:25,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:25,275 INFO L225 Difference]: With dead ends: 2573 [2021-02-19 17:41:25,275 INFO L226 Difference]: Without dead ends: 2571 [2021-02-19 17:41:25,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-02-19 17:41:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2313. [2021-02-19 17:41:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2313 states. [2021-02-19 17:41:25,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 2983 transitions. [2021-02-19 17:41:25,354 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 2983 transitions. Word has length 25 [2021-02-19 17:41:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:25,354 INFO L480 AbstractCegarLoop]: Abstraction has 2313 states and 2983 transitions. [2021-02-19 17:41:25,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 2983 transitions. [2021-02-19 17:41:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:41:25,358 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:25,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:25,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-19 17:41:25,359 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:25,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:25,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1806720062, now seen corresponding path program 1 times [2021-02-19 17:41:25,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:25,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628496965] [2021-02-19 17:41:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:25,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:25,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:25,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:25,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628496965] [2021-02-19 17:41:25,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:25,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:25,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208108529] [2021-02-19 17:41:25,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:25,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:25,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:25,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:25,402 INFO L87 Difference]: Start difference. First operand 2313 states and 2983 transitions. Second operand 4 states. [2021-02-19 17:41:25,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:25,598 INFO L93 Difference]: Finished difference Result 5197 states and 6633 transitions. [2021-02-19 17:41:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:25,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-19 17:41:25,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:25,612 INFO L225 Difference]: With dead ends: 5197 [2021-02-19 17:41:25,613 INFO L226 Difference]: Without dead ends: 2955 [2021-02-19 17:41:25,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:25,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-02-19 17:41:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2953. [2021-02-19 17:41:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2953 states. [2021-02-19 17:41:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 3655 transitions. [2021-02-19 17:41:25,744 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 3655 transitions. Word has length 25 [2021-02-19 17:41:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:25,745 INFO L480 AbstractCegarLoop]: Abstraction has 2953 states and 3655 transitions. [2021-02-19 17:41:25,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 3655 transitions. [2021-02-19 17:41:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:41:25,749 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:25,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:25,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-19 17:41:25,750 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:25,750 INFO L82 PathProgramCache]: Analyzing trace with hash -431696435, now seen corresponding path program 1 times [2021-02-19 17:41:25,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:25,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35821443] [2021-02-19 17:41:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:25,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:25,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:25,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:25,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35821443] [2021-02-19 17:41:25,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:25,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:25,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614364801] [2021-02-19 17:41:25,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:25,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:25,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:25,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:25,797 INFO L87 Difference]: Start difference. First operand 2953 states and 3655 transitions. Second operand 4 states. [2021-02-19 17:41:25,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:25,954 INFO L93 Difference]: Finished difference Result 4429 states and 5449 transitions. [2021-02-19 17:41:25,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:25,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-19 17:41:25,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:25,968 INFO L225 Difference]: With dead ends: 4429 [2021-02-19 17:41:25,968 INFO L226 Difference]: Without dead ends: 3019 [2021-02-19 17:41:25,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-02-19 17:41:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3017. [2021-02-19 17:41:26,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3017 states. [2021-02-19 17:41:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 3655 transitions. [2021-02-19 17:41:26,133 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 3655 transitions. Word has length 26 [2021-02-19 17:41:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:26,134 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 3655 transitions. [2021-02-19 17:41:26,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 3655 transitions. [2021-02-19 17:41:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:41:26,139 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:26,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:26,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-19 17:41:26,141 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:26,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:26,142 INFO L82 PathProgramCache]: Analyzing trace with hash -173530997, now seen corresponding path program 1 times [2021-02-19 17:41:26,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:26,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20658828] [2021-02-19 17:41:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:26,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:26,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:26,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:26,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:26,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:26,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:26,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:26,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:26,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:26,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20658828] [2021-02-19 17:41:26,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:26,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:26,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533406083] [2021-02-19 17:41:26,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:26,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:26,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:26,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:26,208 INFO L87 Difference]: Start difference. First operand 3017 states and 3655 transitions. Second operand 4 states. [2021-02-19 17:41:26,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:26,409 INFO L93 Difference]: Finished difference Result 4875 states and 5832 transitions. [2021-02-19 17:41:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:26,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-19 17:41:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:26,432 INFO L225 Difference]: With dead ends: 4875 [2021-02-19 17:41:26,432 INFO L226 Difference]: Without dead ends: 4873 [2021-02-19 17:41:26,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:26,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4873 states. [2021-02-19 17:41:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4873 to 4617. [2021-02-19 17:41:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4617 states. [2021-02-19 17:41:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4617 states to 4617 states and 5447 transitions. [2021-02-19 17:41:26,622 INFO L78 Accepts]: Start accepts. Automaton has 4617 states and 5447 transitions. Word has length 26 [2021-02-19 17:41:26,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:26,623 INFO L480 AbstractCegarLoop]: Abstraction has 4617 states and 5447 transitions. [2021-02-19 17:41:26,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4617 states and 5447 transitions. [2021-02-19 17:41:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:41:26,631 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:26,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:26,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-19 17:41:26,631 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:26,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:26,632 INFO L82 PathProgramCache]: Analyzing trace with hash 527533581, now seen corresponding path program 1 times [2021-02-19 17:41:26,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:26,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019518482] [2021-02-19 17:41:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:26,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:26,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:26,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:26,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:26,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:26,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:26,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:26,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:26,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:26,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019518482] [2021-02-19 17:41:26,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:26,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:26,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501945557] [2021-02-19 17:41:26,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:26,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:26,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:26,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:26,681 INFO L87 Difference]: Start difference. First operand 4617 states and 5447 transitions. Second operand 4 states. [2021-02-19 17:41:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:26,923 INFO L93 Difference]: Finished difference Result 10249 states and 11847 transitions. [2021-02-19 17:41:26,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:26,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-19 17:41:26,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:26,924 INFO L225 Difference]: With dead ends: 10249 [2021-02-19 17:41:26,925 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 17:41:26,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:26,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 17:41:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 17:41:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-19 17:41:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 17:41:26,944 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-02-19 17:41:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:26,945 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 17:41:26,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 17:41:26,945 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 17:41:26,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-19 17:41:26,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-19 17:41:32,685 WARN L202 SmtUtils]: Spent 5.72 s on a formula simplification. DAG size of input: 1093 DAG size of output: 32 [2021-02-19 17:41:32,728 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-19 17:41:32,728 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-19 17:41:32,728 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-19 17:41:32,729 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:41:32,729 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-19 17:41:32,729 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:41:32,729 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:41:32,729 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-19 17:41:32,729 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-19 17:41:32,729 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:41:32,730 INFO L189 CegarLoopUtils]: For program point L93(line 93) no Hoare annotation was computed. [2021-02-19 17:41:32,730 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 137) no Hoare annotation was computed. [2021-02-19 17:41:32,730 INFO L189 CegarLoopUtils]: For program point L118(line 118) no Hoare annotation was computed. [2021-02-19 17:41:32,730 INFO L189 CegarLoopUtils]: For program point L102-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,730 INFO L192 CegarLoopUtils]: At program point L127-1(lines 35 132) the Hoare annotation is: true [2021-02-19 17:41:32,730 INFO L189 CegarLoopUtils]: For program point L86-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,730 INFO L189 CegarLoopUtils]: For program point L78-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,730 INFO L189 CegarLoopUtils]: For program point L103(line 103) no Hoare annotation was computed. [2021-02-19 17:41:32,730 INFO L189 CegarLoopUtils]: For program point L37(lines 37 39) no Hoare annotation was computed. [2021-02-19 17:41:32,731 INFO L189 CegarLoopUtils]: For program point L70-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,731 INFO L189 CegarLoopUtils]: For program point L128(line 128) no Hoare annotation was computed. [2021-02-19 17:41:32,731 INFO L185 CegarLoopUtils]: At program point L128-1(lines 7 137) the Hoare annotation is: false [2021-02-19 17:41:32,731 INFO L189 CegarLoopUtils]: For program point L62-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,731 INFO L189 CegarLoopUtils]: For program point L112-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,731 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 137) no Hoare annotation was computed. [2021-02-19 17:41:32,731 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 135) no Hoare annotation was computed. [2021-02-19 17:41:32,731 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 137) the Hoare annotation is: true [2021-02-19 17:41:32,732 INFO L189 CegarLoopUtils]: For program point L113(line 113) no Hoare annotation was computed. [2021-02-19 17:41:32,732 INFO L189 CegarLoopUtils]: For program point L97-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,732 INFO L189 CegarLoopUtils]: For program point L122-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,732 INFO L189 CegarLoopUtils]: For program point L98(line 98) no Hoare annotation was computed. [2021-02-19 17:41:32,732 INFO L189 CegarLoopUtils]: For program point L123(line 123) no Hoare annotation was computed. [2021-02-19 17:41:32,732 INFO L189 CegarLoopUtils]: For program point L82-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,732 INFO L189 CegarLoopUtils]: For program point L107-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,732 INFO L189 CegarLoopUtils]: For program point L74-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,732 INFO L189 CegarLoopUtils]: For program point L66-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,733 INFO L189 CegarLoopUtils]: For program point L58(lines 58 60) no Hoare annotation was computed. [2021-02-19 17:41:32,733 INFO L189 CegarLoopUtils]: For program point L58-2(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,733 INFO L189 CegarLoopUtils]: For program point L108(line 108) no Hoare annotation was computed. [2021-02-19 17:41:32,733 INFO L192 CegarLoopUtils]: At program point L133(lines 7 137) the Hoare annotation is: true [2021-02-19 17:41:32,733 INFO L189 CegarLoopUtils]: For program point L92-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,733 INFO L189 CegarLoopUtils]: For program point L117-1(lines 35 132) no Hoare annotation was computed. [2021-02-19 17:41:32,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:41:32 BoogieIcfgContainer [2021-02-19 17:41:32,745 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:41:32,746 INFO L168 Benchmark]: Toolchain (without parser) took 13598.11 ms. Allocated memory was 155.2 MB in the beginning and 418.4 MB in the end (delta: 263.2 MB). Free memory was 137.3 MB in the beginning and 164.5 MB in the end (delta: -27.1 MB). Peak memory consumption was 264.4 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:32,747 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 155.2 MB. Free memory is still 128.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:41:32,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.17 ms. Allocated memory is still 155.2 MB. Free memory was 136.2 MB in the beginning and 126.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:32,747 INFO L168 Benchmark]: Boogie Preprocessor took 91.78 ms. Allocated memory is still 155.2 MB. Free memory was 126.0 MB in the beginning and 124.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:32,747 INFO L168 Benchmark]: RCFGBuilder took 664.79 ms. Allocated memory is still 155.2 MB. Free memory was 124.3 MB in the beginning and 120.0 MB in the end (delta: 4.4 MB). Peak memory consumption was 7.1 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:32,748 INFO L168 Benchmark]: TraceAbstraction took 12544.77 ms. Allocated memory was 155.2 MB in the beginning and 418.4 MB in the end (delta: 263.2 MB). Free memory was 119.6 MB in the beginning and 164.5 MB in the end (delta: -44.9 MB). Peak memory consumption was 247.9 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:32,749 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 155.2 MB. Free memory is still 128.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.17 ms. Allocated memory is still 155.2 MB. Free memory was 136.2 MB in the beginning and 126.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 91.78 ms. Allocated memory is still 155.2 MB. Free memory was 126.0 MB in the beginning and 124.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 664.79 ms. Allocated memory is still 155.2 MB. Free memory was 124.3 MB in the beginning and 120.0 MB in the end (delta: 4.4 MB). Peak memory consumption was 7.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12544.77 ms. Allocated memory was 155.2 MB in the beginning and 418.4 MB in the end (delta: 263.2 MB). Free memory was 119.6 MB in the beginning and 164.5 MB in the end (delta: -44.9 MB). Peak memory consumption was 247.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 135]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.6s, OverallIterations: 22, TraceHistogramMax: 1, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1542 SDtfs, 2238 SDslu, 136 SDs, 0 SdLazy, 1125 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4617occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 22 MinimizatonAttempts, 1044 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 3426278 FormulaSimplificationTreeSizeReduction, 5.7s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 500 NumberOfCodeBlocks, 500 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 478 ConstructedInterpolants, 0 QuantifiedInterpolants, 33900 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...