/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:19:13,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:19:13,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:19:13,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 18:19:13,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:19:13,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:19:13,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:19:13,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:19:13,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:19:13,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:19:13,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:19:13,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:19:13,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:19:13,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:19:13,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:19:13,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:19:13,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:19:13,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:19:13,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:19:13,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:19:13,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:19:13,816 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:19:13,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:19:13,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:19:13,820 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:19:13,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:19:13,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:19:13,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:19:13,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:19:13,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:19:13,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:19:13,822 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:19:13,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:19:13,823 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:19:13,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:19:13,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:19:13,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:19:13,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:19:13,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:19:13,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:19:13,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:19:13,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:19:13,826 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:19:13,826 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:19:14,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:19:14,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:19:14,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:19:14,212 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:19:14,215 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:19:14,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.i [2021-05-02 18:19:14,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bc373b9e/45ef7f6f97fa45b8af2efd768c495373/FLAGac18a5e92 [2021-05-02 18:19:14,842 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:19:14,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i [2021-05-02 18:19:14,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bc373b9e/45ef7f6f97fa45b8af2efd768c495373/FLAGac18a5e92 [2021-05-02 18:19:15,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bc373b9e/45ef7f6f97fa45b8af2efd768c495373 [2021-05-02 18:19:15,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:19:15,254 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:19:15,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:19:15,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:19:15,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:19:15,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:19:15" (1/1) ... [2021-05-02 18:19:15,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@410a8830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:15, skipping insertion in model container [2021-05-02 18:19:15,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:19:15" (1/1) ... [2021-05-02 18:19:15,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:19:15,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:19:15,392 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i[895,908] [2021-05-02 18:19:15,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:19:15,410 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:19:15,422 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i[895,908] [2021-05-02 18:19:15,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:19:15,438 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:19:15,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:15 WrapperNode [2021-05-02 18:19:15,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:19:15,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:19:15,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:19:15,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:19:15,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:15" (1/1) ... [2021-05-02 18:19:15,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:15" (1/1) ... [2021-05-02 18:19:15,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:15" (1/1) ... [2021-05-02 18:19:15,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:15" (1/1) ... [2021-05-02 18:19:15,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:15" (1/1) ... [2021-05-02 18:19:15,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:15" (1/1) ... [2021-05-02 18:19:15,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:15" (1/1) ... [2021-05-02 18:19:15,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:19:15,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:19:15,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:19:15,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:19:15,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:15" (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 [2021-05-02 18:19:15,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:19:15,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:19:15,598 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:19:15,598 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:19:15,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:19:15,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:19:15,599 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:19:15,599 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:19:15,599 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:19:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:19:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:19:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:19:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:19:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:19:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:19:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:19:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:19:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:19:15,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:19:15,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:19:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:19:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:19:15,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:19:15,896 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:19:15,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:19:15 BoogieIcfgContainer [2021-05-02 18:19:15,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:19:15,899 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:19:15,899 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:19:15,899 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:19:15,902 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:19:15" (1/1) ... [2021-05-02 18:19:15,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:19:15 BasicIcfg [2021-05-02 18:19:15,917 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:19:15,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:19:15,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:19:15,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:19:15,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:19:15" (1/4) ... [2021-05-02 18:19:15,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a05721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:19:15, skipping insertion in model container [2021-05-02 18:19:15,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:15" (2/4) ... [2021-05-02 18:19:15,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a05721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:19:15, skipping insertion in model container [2021-05-02 18:19:15,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:19:15" (3/4) ... [2021-05-02 18:19:15,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a05721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:19:15, skipping insertion in model container [2021-05-02 18:19:15,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:19:15" (4/4) ... [2021-05-02 18:19:15,924 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.iJordan [2021-05-02 18:19:15,930 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:19:15,934 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:19:15,949 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:19:15,966 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:19:15,966 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:19:15,967 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:19:15,967 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:19:15,967 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:19:15,967 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:19:15,967 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:19:15,967 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:19:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:19:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 18:19:15,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:15,986 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:15,986 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:15,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2102751182, now seen corresponding path program 1 times [2021-05-02 18:19:16,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:16,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74469725] [2021-05-02 18:19:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:16,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:16,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:16,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74469725] [2021-05-02 18:19:16,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74469725] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:19:16,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:19:16,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:19:16,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169422682] [2021-05-02 18:19:16,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:19:16,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:16,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:19:16,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:19:16,295 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:16,377 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-02 18:19:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:19:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 18:19:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:16,388 INFO L225 Difference]: With dead ends: 20 [2021-05-02 18:19:16,388 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 18:19:16,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:19:16,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 18:19:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 18:19:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-05-02 18:19:16,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-05-02 18:19:16,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:16,421 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-05-02 18:19:16,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:16,421 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-05-02 18:19:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 18:19:16,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:16,423 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:16,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:19:16,424 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2101827661, now seen corresponding path program 1 times [2021-05-02 18:19:16,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:16,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164022041] [2021-05-02 18:19:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:16,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:16,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:16,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164022041] [2021-05-02 18:19:16,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164022041] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:19:16,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:19:16,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:19:16,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778712439] [2021-05-02 18:19:16,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:19:16,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:16,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:19:16,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:19:16,550 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:16,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:16,616 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-05-02 18:19:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:19:16,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 18:19:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:16,617 INFO L225 Difference]: With dead ends: 15 [2021-05-02 18:19:16,617 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 18:19:16,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:19:16,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 18:19:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 18:19:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 18:19:16,622 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-05-02 18:19:16,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:16,622 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 18:19:16,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 18:19:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 18:19:16,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:16,623 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:16,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:19:16,624 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:16,624 INFO L82 PathProgramCache]: Analyzing trace with hash -311341615, now seen corresponding path program 1 times [2021-05-02 18:19:16,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:16,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211072138] [2021-05-02 18:19:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:16,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:16,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:16,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211072138] [2021-05-02 18:19:16,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211072138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:16,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642845333] [2021-05-02 18:19:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:16,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 18:19:16,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:16,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:16,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:16,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642845333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:16,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:16,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 18:19:16,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506227211] [2021-05-02 18:19:16,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:19:16,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:16,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:19:16,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:19:16,839 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:16,910 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-05-02 18:19:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 18:19:16,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 18:19:16,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:16,912 INFO L225 Difference]: With dead ends: 17 [2021-05-02 18:19:16,912 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 18:19:16,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:19:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 18:19:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 18:19:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-02 18:19:16,915 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-05-02 18:19:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:16,916 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-02 18:19:16,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-02 18:19:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 18:19:16,916 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:16,917 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:17,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:19:17,133 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:17,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:17,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1936137105, now seen corresponding path program 2 times [2021-05-02 18:19:17,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:17,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110696875] [2021-05-02 18:19:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:17,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 18:19:17,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:17,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110696875] [2021-05-02 18:19:17,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110696875] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:19:17,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:19:17,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:19:17,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844918186] [2021-05-02 18:19:17,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:19:17,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:17,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:19:17,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:19:17,190 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:17,254 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-02 18:19:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:19:17,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 18:19:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:17,256 INFO L225 Difference]: With dead ends: 19 [2021-05-02 18:19:17,256 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 18:19:17,256 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:19:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 18:19:17,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 18:19:17,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-05-02 18:19:17,260 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2021-05-02 18:19:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:17,260 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-05-02 18:19:17,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-05-02 18:19:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 18:19:17,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:17,261 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:17,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 18:19:17,262 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:17,262 INFO L82 PathProgramCache]: Analyzing trace with hash 32121900, now seen corresponding path program 1 times [2021-05-02 18:19:17,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:17,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774170522] [2021-05-02 18:19:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:17,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:17,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:17,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774170522] [2021-05-02 18:19:17,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774170522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:17,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810208383] [2021-05-02 18:19:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:17,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 18:19:17,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:17,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:17,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:17,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:17,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:17,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810208383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:17,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:17,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 18:19:17,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860086745] [2021-05-02 18:19:17,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:19:17,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:17,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:19:17,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:19:17,574 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:17,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:17,703 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-02 18:19:17,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 18:19:17,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 18:19:17,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:17,705 INFO L225 Difference]: With dead ends: 20 [2021-05-02 18:19:17,706 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 18:19:17,708 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:19:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 18:19:17,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 18:19:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-05-02 18:19:17,720 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-05-02 18:19:17,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:17,720 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-05-02 18:19:17,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-05-02 18:19:17,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 18:19:17,722 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:17,723 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:17,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:17,948 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:17,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:17,949 INFO L82 PathProgramCache]: Analyzing trace with hash 605130, now seen corresponding path program 2 times [2021-05-02 18:19:17,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:17,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751207118] [2021-05-02 18:19:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:18,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:18,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:18,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751207118] [2021-05-02 18:19:18,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751207118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:18,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246179633] [2021-05-02 18:19:18,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:18,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:19:18,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:18,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 18:19:18,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:18,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:18,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:18,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:18,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:18,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:18,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:18,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246179633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:18,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:18,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 18:19:18,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674078018] [2021-05-02 18:19:18,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:19:18,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:18,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:19:18,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:19:18,221 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:18,361 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-05-02 18:19:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:19:18,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 18:19:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:18,363 INFO L225 Difference]: With dead ends: 22 [2021-05-02 18:19:18,363 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 18:19:18,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:19:18,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 18:19:18,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 18:19:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-02 18:19:18,372 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2021-05-02 18:19:18,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:18,372 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-02 18:19:18,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-02 18:19:18,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 18:19:18,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:18,374 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:18,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:18,589 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:18,590 INFO L82 PathProgramCache]: Analyzing trace with hash -222239768, now seen corresponding path program 3 times [2021-05-02 18:19:18,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:18,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37216265] [2021-05-02 18:19:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:18,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:18,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:18,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37216265] [2021-05-02 18:19:18,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37216265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:18,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091575244] [2021-05-02 18:19:18,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:18,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 18:19:18,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:18,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 18:19:18,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:18,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:18,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:18,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:18,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 18:19:18,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091575244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:18,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:18,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-05-02 18:19:18,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630854034] [2021-05-02 18:19:18,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 18:19:18,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:18,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 18:19:18,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:19:18,805 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:19,009 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-05-02 18:19:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 18:19:19,010 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 18:19:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:19,012 INFO L225 Difference]: With dead ends: 27 [2021-05-02 18:19:19,012 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 18:19:19,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-05-02 18:19:19,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 18:19:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 18:19:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-05-02 18:19:19,016 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2021-05-02 18:19:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:19,017 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-05-02 18:19:19,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-05-02 18:19:19,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 18:19:19,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:19,022 INFO L523 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:19,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:19,248 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:19,249 INFO L82 PathProgramCache]: Analyzing trace with hash 2119864963, now seen corresponding path program 4 times [2021-05-02 18:19:19,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:19,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88047869] [2021-05-02 18:19:19,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:19,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 18:19:19,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:19,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88047869] [2021-05-02 18:19:19,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88047869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:19,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820143586] [2021-05-02 18:19:19,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:19,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:19:19,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:19,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 18:19:19,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:19,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:19,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:19,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:19,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:19,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:19,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:19,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:19,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:19,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:19,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 18:19:19,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820143586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:19,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:19,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 18:19:19,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530101970] [2021-05-02 18:19:19,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 18:19:19,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:19,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 18:19:19,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:19:19,525 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:19,721 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-05-02 18:19:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:19:19,721 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 18:19:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:19,722 INFO L225 Difference]: With dead ends: 28 [2021-05-02 18:19:19,722 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 18:19:19,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-02 18:19:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 18:19:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 18:19:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-05-02 18:19:19,726 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2021-05-02 18:19:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:19,726 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-05-02 18:19:19,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:19,726 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-05-02 18:19:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 18:19:19,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:19,727 INFO L523 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:19,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:19,953 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1783682015, now seen corresponding path program 5 times [2021-05-02 18:19:19,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:19,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576261523] [2021-05-02 18:19:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:20,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 18:19:20,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:20,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576261523] [2021-05-02 18:19:20,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576261523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:20,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463642304] [2021-05-02 18:19:20,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:20,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-02 18:19:20,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:20,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 18:19:20,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:20,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 18:19:20,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463642304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:20,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:20,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 18:19:20,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332337161] [2021-05-02 18:19:20,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 18:19:20,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:20,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 18:19:20,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:19:20,252 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:20,486 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-05-02 18:19:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 18:19:20,487 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 18:19:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:20,489 INFO L225 Difference]: With dead ends: 30 [2021-05-02 18:19:20,489 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 18:19:20,490 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:19:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 18:19:20,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 18:19:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:20,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-02 18:19:20,502 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-05-02 18:19:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:20,504 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-02 18:19:20,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-02 18:19:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 18:19:20,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:20,508 INFO L523 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:20,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:20,713 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:20,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:20,714 INFO L82 PathProgramCache]: Analyzing trace with hash 709088831, now seen corresponding path program 6 times [2021-05-02 18:19:20,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:20,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265947563] [2021-05-02 18:19:20,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:20,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 18:19:20,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:20,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265947563] [2021-05-02 18:19:20,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265947563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:20,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152844209] [2021-05-02 18:19:20,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:20,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-02 18:19:20,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 18:19:20,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:20,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:20,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152844209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:20,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:20,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-05-02 18:19:20,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697580206] [2021-05-02 18:19:20,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 18:19:20,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:20,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 18:19:20,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:19:20,986 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:21,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:21,286 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-05-02 18:19:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 18:19:21,288 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 18:19:21,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:21,288 INFO L225 Difference]: With dead ends: 36 [2021-05-02 18:19:21,288 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 18:19:21,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 312.5ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-05-02 18:19:21,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 18:19:21,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 18:19:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-05-02 18:19:21,300 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2021-05-02 18:19:21,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:21,301 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-05-02 18:19:21,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:21,301 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-05-02 18:19:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 18:19:21,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:21,305 INFO L523 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:21,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 18:19:21,521 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:21,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1611986841, now seen corresponding path program 7 times [2021-05-02 18:19:21,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:21,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049412583] [2021-05-02 18:19:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:21,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 18:19:21,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:21,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049412583] [2021-05-02 18:19:21,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049412583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:21,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789629394] [2021-05-02 18:19:21,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:21,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 18:19:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:21,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 18:19:21,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789629394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:21,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:21,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-02 18:19:21,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648925071] [2021-05-02 18:19:21,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 18:19:21,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:21,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 18:19:21,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 18:19:21,875 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:22,158 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-05-02 18:19:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 18:19:22,158 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 18:19:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:22,159 INFO L225 Difference]: With dead ends: 38 [2021-05-02 18:19:22,159 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 18:19:22,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-05-02 18:19:22,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 18:19:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 18:19:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-02 18:19:22,163 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2021-05-02 18:19:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:22,163 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-02 18:19:22,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-02 18:19:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 18:19:22,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:22,164 INFO L523 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:22,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 18:19:22,369 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:22,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:22,371 INFO L82 PathProgramCache]: Analyzing trace with hash -228285513, now seen corresponding path program 8 times [2021-05-02 18:19:22,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:22,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160743427] [2021-05-02 18:19:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:22,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 18:19:22,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:22,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160743427] [2021-05-02 18:19:22,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160743427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:22,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103744896] [2021-05-02 18:19:22,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:22,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:19:22,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 18:19:22,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:22,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 18:19:22,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103744896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:22,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:22,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 18:19:22,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112549268] [2021-05-02 18:19:22,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 18:19:22,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:22,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 18:19:22,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 18:19:22,682 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:23,047 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-05-02 18:19:23,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 18:19:23,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-02 18:19:23,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:23,048 INFO L225 Difference]: With dead ends: 40 [2021-05-02 18:19:23,048 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 18:19:23,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2021-05-02 18:19:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 18:19:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 18:19:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 18:19:23,052 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2021-05-02 18:19:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:23,052 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 18:19:23,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 18:19:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 18:19:23,053 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:23,053 INFO L523 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:23,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:23,277 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:23,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:23,277 INFO L82 PathProgramCache]: Analyzing trace with hash 796508245, now seen corresponding path program 9 times [2021-05-02 18:19:23,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:23,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574925238] [2021-05-02 18:19:23,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:23,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 18:19:23,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:23,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574925238] [2021-05-02 18:19:23,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574925238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:23,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104407163] [2021-05-02 18:19:23,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:23,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 18:19:23,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:23,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 18:19:23,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:23,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:23,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:23,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:23,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:23,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:23,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-05-02 18:19:23,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104407163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:23,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:23,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 19 [2021-05-02 18:19:23,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439756988] [2021-05-02 18:19:23,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 18:19:23,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:23,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 18:19:23,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 18:19:23,648 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:24,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:24,133 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-05-02 18:19:24,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 18:19:24,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 18:19:24,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:24,135 INFO L225 Difference]: With dead ends: 45 [2021-05-02 18:19:24,135 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 18:19:24,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 564.7ms TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 18:19:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 18:19:24,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-05-02 18:19:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-02 18:19:24,139 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 39 [2021-05-02 18:19:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:24,139 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-02 18:19:24,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-02 18:19:24,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 18:19:24,140 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:24,140 INFO L523 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:24,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:24,357 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:24,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:24,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1378010064, now seen corresponding path program 10 times [2021-05-02 18:19:24,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:24,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150397244] [2021-05-02 18:19:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:24,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 18:19:24,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:24,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150397244] [2021-05-02 18:19:24,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150397244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:24,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122455868] [2021-05-02 18:19:24,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:24,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:19:24,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:24,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 18:19:24,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:24,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 18:19:24,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122455868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:24,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:24,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-02 18:19:24,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382701703] [2021-05-02 18:19:24,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 18:19:24,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:24,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 18:19:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:19:24,715 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:25,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:25,118 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-05-02 18:19:25,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 18:19:25,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-02 18:19:25,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:25,120 INFO L225 Difference]: With dead ends: 46 [2021-05-02 18:19:25,120 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 18:19:25,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2021-05-02 18:19:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 18:19:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 18:19:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-05-02 18:19:25,136 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 43 [2021-05-02 18:19:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:25,136 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-05-02 18:19:25,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-05-02 18:19:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 18:19:25,137 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:25,137 INFO L523 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:25,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 18:19:25,364 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:25,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:25,365 INFO L82 PathProgramCache]: Analyzing trace with hash -607786418, now seen corresponding path program 11 times [2021-05-02 18:19:25,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:25,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130842662] [2021-05-02 18:19:25,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:25,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 18:19:25,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:25,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130842662] [2021-05-02 18:19:25,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130842662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:25,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266166437] [2021-05-02 18:19:25,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:25,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 18:19:25,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:25,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 18:19:25,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:25,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 18:19:25,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266166437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:25,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:25,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 18:19:25,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218679153] [2021-05-02 18:19:25,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 18:19:25,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 18:19:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 18:19:25,713 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:26,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:26,172 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-05-02 18:19:26,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 18:19:26,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-02 18:19:26,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:26,173 INFO L225 Difference]: With dead ends: 48 [2021-05-02 18:19:26,173 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 18:19:26,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 490.9ms TimeCoverageRelationStatistics Valid=426, Invalid=696, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 18:19:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 18:19:26,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 18:19:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-05-02 18:19:26,176 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 45 [2021-05-02 18:19:26,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:26,176 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-05-02 18:19:26,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:26,177 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-05-02 18:19:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 18:19:26,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:26,177 INFO L523 BasicCegarLoop]: trace histogram [18, 15, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:26,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 18:19:26,381 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash 842762476, now seen corresponding path program 12 times [2021-05-02 18:19:26,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:26,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955801323] [2021-05-02 18:19:26,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:26,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 80 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 18:19:26,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:26,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955801323] [2021-05-02 18:19:26,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955801323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:26,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272193818] [2021-05-02 18:19:26,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:26,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-02 18:19:26,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:26,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 18:19:26,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:26,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:26,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:26,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:26,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:26,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:26,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:26,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:26,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 105 proven. 9 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-02 18:19:26,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272193818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:26,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:26,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6] total 23 [2021-05-02 18:19:26,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681611481] [2021-05-02 18:19:26,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 18:19:26,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:26,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 18:19:26,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 18:19:26,807 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:27,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:27,363 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-02 18:19:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 18:19:27,363 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 18:19:27,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:27,364 INFO L225 Difference]: With dead ends: 53 [2021-05-02 18:19:27,364 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 18:19:27,365 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 673.7ms TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 18:19:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 18:19:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-05-02 18:19:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-05-02 18:19:27,368 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 47 [2021-05-02 18:19:27,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:27,368 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-05-02 18:19:27,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-05-02 18:19:27,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 18:19:27,369 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:27,369 INFO L523 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:27,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 18:19:27,585 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:27,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1734427385, now seen corresponding path program 13 times [2021-05-02 18:19:27,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:27,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184853207] [2021-05-02 18:19:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:27,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 18:19:27,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:27,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184853207] [2021-05-02 18:19:27,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184853207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:27,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513411959] [2021-05-02 18:19:27,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:27,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 18:19:27,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:27,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:27,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:28,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:28,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 18:19:28,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513411959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:28,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:28,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2021-05-02 18:19:28,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050058757] [2021-05-02 18:19:28,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 18:19:28,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:28,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 18:19:28,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 18:19:28,032 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:28,486 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-05-02 18:19:28,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 18:19:28,486 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 18:19:28,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:28,487 INFO L225 Difference]: With dead ends: 54 [2021-05-02 18:19:28,487 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 18:19:28,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 554.3ms TimeCoverageRelationStatistics Valid=533, Invalid=873, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 18:19:28,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 18:19:28,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 18:19:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-05-02 18:19:28,490 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 51 [2021-05-02 18:19:28,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:28,491 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-05-02 18:19:28,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:28,491 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-05-02 18:19:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 18:19:28,492 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:28,492 INFO L523 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:28,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:28,705 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:28,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:28,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1107193125, now seen corresponding path program 14 times [2021-05-02 18:19:28,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:28,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866238532] [2021-05-02 18:19:28,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:28,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 18:19:28,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:28,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866238532] [2021-05-02 18:19:28,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866238532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:28,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994138076] [2021-05-02 18:19:28,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:28,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:19:28,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:28,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 18:19:28,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:29,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 18:19:29,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994138076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:29,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:29,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 18:19:29,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358428026] [2021-05-02 18:19:29,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 18:19:29,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:29,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 18:19:29,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 18:19:29,135 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:29,587 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2021-05-02 18:19:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 18:19:29,588 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-02 18:19:29,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:29,589 INFO L225 Difference]: With dead ends: 56 [2021-05-02 18:19:29,589 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 18:19:29,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 573.9ms TimeCoverageRelationStatistics Valid=591, Invalid=969, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 18:19:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 18:19:29,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 18:19:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-05-02 18:19:29,592 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 53 [2021-05-02 18:19:29,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:29,592 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-05-02 18:19:29,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:29,593 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-05-02 18:19:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 18:19:29,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:29,593 INFO L523 BasicCegarLoop]: trace histogram [22, 18, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:29,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 18:19:29,802 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:29,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash 305302979, now seen corresponding path program 15 times [2021-05-02 18:19:29,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:29,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879673148] [2021-05-02 18:19:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:30,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 133 proven. 342 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 18:19:30,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:30,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879673148] [2021-05-02 18:19:30,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879673148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:30,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284380057] [2021-05-02 18:19:30,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:30,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 18:19:30,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:30,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 18:19:30,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:30,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:30,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:30,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:30,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:30,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:30,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:30,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:30,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:30,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:30,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 162 proven. 16 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-05-02 18:19:30,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284380057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:30,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:30,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2021-05-02 18:19:30,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125167022] [2021-05-02 18:19:30,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 18:19:30,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:30,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 18:19:30,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 18:19:30,306 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:31,021 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-05-02 18:19:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 18:19:31,022 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-02 18:19:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:31,023 INFO L225 Difference]: With dead ends: 61 [2021-05-02 18:19:31,023 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 18:19:31,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 883.2ms TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 18:19:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 18:19:31,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 18:19:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 55 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-05-02 18:19:31,026 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 55 [2021-05-02 18:19:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:31,027 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-05-02 18:19:31,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-05-02 18:19:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 18:19:31,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:31,027 INFO L523 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:31,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:31,241 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:31,241 INFO L82 PathProgramCache]: Analyzing trace with hash -376083938, now seen corresponding path program 16 times [2021-05-02 18:19:31,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:31,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632349668] [2021-05-02 18:19:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:31,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 18:19:31,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:31,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632349668] [2021-05-02 18:19:31,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632349668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:31,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336567662] [2021-05-02 18:19:31,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:31,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:19:31,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:31,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 18:19:31,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:31,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 18:19:31,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336567662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:31,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:31,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-02 18:19:31,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464779810] [2021-05-02 18:19:31,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 18:19:31,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:31,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 18:19:31,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 18:19:31,708 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:32,298 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-05-02 18:19:32,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 18:19:32,299 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-02 18:19:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:32,300 INFO L225 Difference]: With dead ends: 62 [2021-05-02 18:19:32,300 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 18:19:32,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 663.7ms TimeCoverageRelationStatistics Valid=716, Invalid=1176, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 18:19:32,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 18:19:32,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-02 18:19:32,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-05-02 18:19:32,303 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 59 [2021-05-02 18:19:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:32,303 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-05-02 18:19:32,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-05-02 18:19:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 18:19:32,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:32,304 INFO L523 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:32,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:32,505 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:32,505 INFO L82 PathProgramCache]: Analyzing trace with hash 810163260, now seen corresponding path program 17 times [2021-05-02 18:19:32,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:32,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027630867] [2021-05-02 18:19:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:32,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 18:19:32,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:32,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027630867] [2021-05-02 18:19:32,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027630867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:32,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640508268] [2021-05-02 18:19:32,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:32,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-05-02 18:19:32,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:32,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 18:19:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:32,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 18:19:32,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640508268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:32,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:32,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 18:19:32,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5710481] [2021-05-02 18:19:32,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 18:19:32,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:32,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 18:19:32,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 18:19:32,965 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:33,529 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2021-05-02 18:19:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 18:19:33,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-02 18:19:33,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:33,530 INFO L225 Difference]: With dead ends: 64 [2021-05-02 18:19:33,530 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 18:19:33,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 671.9ms TimeCoverageRelationStatistics Valid=783, Invalid=1287, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 18:19:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 18:19:33,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 18:19:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 59 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2021-05-02 18:19:33,534 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 61 [2021-05-02 18:19:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:33,534 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2021-05-02 18:19:33,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2021-05-02 18:19:33,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 18:19:33,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:33,535 INFO L523 BasicCegarLoop]: trace histogram [26, 21, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:33,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 18:19:33,749 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:33,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1667580198, now seen corresponding path program 18 times [2021-05-02 18:19:33,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:33,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229952322] [2021-05-02 18:19:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:34,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 198 proven. 462 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 18:19:34,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:34,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229952322] [2021-05-02 18:19:34,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229952322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:34,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731287543] [2021-05-02 18:19:34,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:34,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-05-02 18:19:34,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:34,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 18:19:34,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:34,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:34,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:34,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:34,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:34,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:34,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:34,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:34,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:34,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:34,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:34,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:34,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 231 proven. 25 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-02 18:19:34,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731287543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:34,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:34,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 31 [2021-05-02 18:19:34,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549490675] [2021-05-02 18:19:34,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 18:19:34,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:34,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 18:19:34,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 18:19:34,371 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:35,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:35,384 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-05-02 18:19:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 18:19:35,385 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-02 18:19:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:35,386 INFO L225 Difference]: With dead ends: 69 [2021-05-02 18:19:35,386 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 18:19:35,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1224.1ms TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 18:19:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 18:19:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 18:19:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-05-02 18:19:35,390 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 63 [2021-05-02 18:19:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:35,391 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-05-02 18:19:35,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-05-02 18:19:35,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 18:19:35,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:35,393 INFO L523 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:35,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:35,617 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:35,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:35,617 INFO L82 PathProgramCache]: Analyzing trace with hash -792644747, now seen corresponding path program 19 times [2021-05-02 18:19:35,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:35,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428063134] [2021-05-02 18:19:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:35,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 18:19:35,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:35,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428063134] [2021-05-02 18:19:35,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428063134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:35,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600666538] [2021-05-02 18:19:35,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:35,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 18:19:35,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:35,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:35,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:35,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:35,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 18:19:36,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600666538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:36,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:36,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2021-05-02 18:19:36,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276268758] [2021-05-02 18:19:36,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 18:19:36,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:36,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 18:19:36,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 18:19:36,135 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:36,879 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-05-02 18:19:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 18:19:36,879 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-02 18:19:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:36,880 INFO L225 Difference]: With dead ends: 70 [2021-05-02 18:19:36,880 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 18:19:36,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 893.6ms TimeCoverageRelationStatistics Valid=926, Invalid=1524, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 18:19:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 18:19:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-02 18:19:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-05-02 18:19:36,882 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 67 [2021-05-02 18:19:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:36,883 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-05-02 18:19:36,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-05-02 18:19:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 18:19:36,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:36,883 INFO L523 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:37,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 18:19:37,089 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:37,089 INFO L82 PathProgramCache]: Analyzing trace with hash 413722515, now seen corresponding path program 20 times [2021-05-02 18:19:37,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:37,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446918438] [2021-05-02 18:19:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:37,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 18:19:37,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:37,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446918438] [2021-05-02 18:19:37,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446918438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:37,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725865018] [2021-05-02 18:19:37,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:37,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:19:37,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:37,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 18:19:37,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:37,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 18:19:37,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725865018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:37,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:37,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 18:19:37,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158776133] [2021-05-02 18:19:37,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 18:19:37,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 18:19:37,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 18:19:37,623 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:38,433 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-05-02 18:19:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 18:19:38,433 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-02 18:19:38,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:38,434 INFO L225 Difference]: With dead ends: 72 [2021-05-02 18:19:38,434 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 18:19:38,435 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 925.5ms TimeCoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 18:19:38,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 18:19:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-05-02 18:19:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2021-05-02 18:19:38,437 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 69 [2021-05-02 18:19:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:38,437 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2021-05-02 18:19:38,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2021-05-02 18:19:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 18:19:38,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:38,438 INFO L523 BasicCegarLoop]: trace histogram [30, 24, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:38,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 18:19:38,646 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:38,647 INFO L82 PathProgramCache]: Analyzing trace with hash 91491377, now seen corresponding path program 21 times [2021-05-02 18:19:38,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:38,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29405949] [2021-05-02 18:19:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:39,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 275 proven. 600 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 18:19:39,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:39,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29405949] [2021-05-02 18:19:39,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29405949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:39,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995852909] [2021-05-02 18:19:39,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:39,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-02 18:19:39,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:39,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 18:19:39,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:39,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 312 proven. 36 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-05-02 18:19:39,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995852909] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:39,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:39,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2021-05-02 18:19:39,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441666099] [2021-05-02 18:19:39,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 18:19:39,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:39,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 18:19:39,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 18:19:39,370 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:40,469 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-05-02 18:19:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 18:19:40,469 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-02 18:19:40,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:40,470 INFO L225 Difference]: With dead ends: 77 [2021-05-02 18:19:40,470 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 18:19:40,471 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1435.1ms TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 18:19:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 18:19:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-05-02 18:19:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-05-02 18:19:40,473 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 71 [2021-05-02 18:19:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:40,474 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-05-02 18:19:40,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-05-02 18:19:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 18:19:40,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:40,474 INFO L523 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:40,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:40,677 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:40,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:40,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1139149068, now seen corresponding path program 22 times [2021-05-02 18:19:40,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:40,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317612377] [2021-05-02 18:19:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:41,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 18:19:41,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:41,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317612377] [2021-05-02 18:19:41,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317612377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:41,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477875405] [2021-05-02 18:19:41,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:41,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:19:41,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:41,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 18:19:41,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:41,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 18:19:41,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477875405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:41,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:41,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2021-05-02 18:19:41,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726467013] [2021-05-02 18:19:41,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 18:19:41,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:41,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 18:19:41,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 18:19:41,303 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:42,257 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-05-02 18:19:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 18:19:42,258 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-02 18:19:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:42,258 INFO L225 Difference]: With dead ends: 78 [2021-05-02 18:19:42,258 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 18:19:42,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1151.8ms TimeCoverageRelationStatistics Valid=1163, Invalid=1917, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:19:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 18:19:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 18:19:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-05-02 18:19:42,262 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 75 [2021-05-02 18:19:42,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:42,262 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-05-02 18:19:42,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-05-02 18:19:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 18:19:42,273 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:42,273 INFO L523 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:42,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 18:19:42,489 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:42,489 INFO L82 PathProgramCache]: Analyzing trace with hash 853458730, now seen corresponding path program 23 times [2021-05-02 18:19:42,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:42,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640065923] [2021-05-02 18:19:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:42,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 18:19:42,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:42,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640065923] [2021-05-02 18:19:42,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640065923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:42,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320557225] [2021-05-02 18:19:42,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:42,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-05-02 18:19:42,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:42,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 18:19:42,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:42,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:42,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:42,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:42,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:42,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:42,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:42,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:42,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 18:19:43,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320557225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:43,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:43,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 18:19:43,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860396177] [2021-05-02 18:19:43,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 18:19:43,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:43,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 18:19:43,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 18:19:43,156 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:44,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:44,101 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-05-02 18:19:44,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 18:19:44,101 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-02 18:19:44,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:44,102 INFO L225 Difference]: With dead ends: 80 [2021-05-02 18:19:44,102 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 18:19:44,103 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1125.4ms TimeCoverageRelationStatistics Valid=1248, Invalid=2058, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 18:19:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 18:19:44,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-02 18:19:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 75 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-05-02 18:19:44,106 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 77 [2021-05-02 18:19:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:44,106 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-05-02 18:19:44,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-05-02 18:19:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 18:19:44,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:44,107 INFO L523 BasicCegarLoop]: trace histogram [34, 27, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:44,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:44,325 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:44,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:44,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1182950856, now seen corresponding path program 24 times [2021-05-02 18:19:44,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:44,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153698073] [2021-05-02 18:19:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:44,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 364 proven. 756 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 18:19:44,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:44,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153698073] [2021-05-02 18:19:44,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153698073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:44,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829582412] [2021-05-02 18:19:44,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:44,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 18:19:44,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:44,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 18:19:44,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:44,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:44,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:44,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:44,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:44,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:44,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:44,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:44,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:44,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:44,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:45,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:45,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:45,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:45,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:45,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:45,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 405 proven. 49 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2021-05-02 18:19:45,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829582412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:45,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:45,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10] total 39 [2021-05-02 18:19:45,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637009152] [2021-05-02 18:19:45,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 18:19:45,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:45,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 18:19:45,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 18:19:45,142 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:46,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:46,488 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2021-05-02 18:19:46,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 18:19:46,489 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-02 18:19:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:46,490 INFO L225 Difference]: With dead ends: 85 [2021-05-02 18:19:46,490 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 18:19:46,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1697.2ms TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 18:19:46,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 18:19:46,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-05-02 18:19:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 79 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-05-02 18:19:46,494 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 79 [2021-05-02 18:19:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:46,494 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-05-02 18:19:46,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-05-02 18:19:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 18:19:46,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:46,495 INFO L523 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:46,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 18:19:46,705 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:46,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1651778845, now seen corresponding path program 25 times [2021-05-02 18:19:46,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:46,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162232330] [2021-05-02 18:19:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:47,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 18:19:47,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:47,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162232330] [2021-05-02 18:19:47,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162232330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:47,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112382350] [2021-05-02 18:19:47,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:47,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 18:19:47,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:47,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 18:19:47,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112382350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:47,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:47,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2021-05-02 18:19:47,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476333318] [2021-05-02 18:19:47,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 18:19:47,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:47,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 18:19:47,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 18:19:47,337 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:48,304 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-05-02 18:19:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 18:19:48,305 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-02 18:19:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:48,305 INFO L225 Difference]: With dead ends: 86 [2021-05-02 18:19:48,305 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 18:19:48,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1153.4ms TimeCoverageRelationStatistics Valid=1427, Invalid=2355, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 18:19:48,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 18:19:48,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 18:19:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 81 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-05-02 18:19:48,309 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 83 [2021-05-02 18:19:48,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:48,309 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-05-02 18:19:48,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-05-02 18:19:48,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 18:19:48,310 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:48,310 INFO L523 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:48,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 18:19:48,511 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:48,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:48,511 INFO L82 PathProgramCache]: Analyzing trace with hash 460559105, now seen corresponding path program 26 times [2021-05-02 18:19:48,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:48,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610821314] [2021-05-02 18:19:48,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:48,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 18:19:48,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:48,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610821314] [2021-05-02 18:19:48,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610821314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:48,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052137818] [2021-05-02 18:19:48,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:49,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:19:49,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:49,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 18:19:49,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:49,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 18:19:49,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052137818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:49,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:49,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 18:19:49,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142778719] [2021-05-02 18:19:49,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 18:19:49,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 18:19:49,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 18:19:49,217 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:50,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:50,180 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-05-02 18:19:50,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 18:19:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-02 18:19:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:50,181 INFO L225 Difference]: With dead ends: 88 [2021-05-02 18:19:50,181 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 18:19:50,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1243.6ms TimeCoverageRelationStatistics Valid=1521, Invalid=2511, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 18:19:50,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 18:19:50,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-02 18:19:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.108433734939759) internal successors, (92), 83 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-05-02 18:19:50,185 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 85 [2021-05-02 18:19:50,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:50,185 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-05-02 18:19:50,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-05-02 18:19:50,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 18:19:50,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:50,186 INFO L523 BasicCegarLoop]: trace histogram [38, 30, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:50,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:50,402 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:50,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1102201953, now seen corresponding path program 27 times [2021-05-02 18:19:50,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:50,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099838761] [2021-05-02 18:19:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:50,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 18:19:50,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:50,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099838761] [2021-05-02 18:19:50,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099838761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:50,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125750782] [2021-05-02 18:19:50,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:50,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-02 18:19:50,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:50,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 18:19:50,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:51,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 510 proven. 64 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-05-02 18:19:51,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125750782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:51,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:51,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 11] total 43 [2021-05-02 18:19:51,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941547861] [2021-05-02 18:19:51,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 18:19:51,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:51,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 18:19:51,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 18:19:51,383 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:52,880 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2021-05-02 18:19:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 18:19:52,881 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-02 18:19:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:52,881 INFO L225 Difference]: With dead ends: 93 [2021-05-02 18:19:52,881 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 18:19:52,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1980.5ms TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 18:19:52,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 18:19:52,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 18:19:52,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 87 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-02 18:19:52,885 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 87 [2021-05-02 18:19:52,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:52,885 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-02 18:19:52,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-02 18:19:52,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 18:19:52,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:52,886 INFO L523 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:53,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:53,089 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:53,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:53,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2080282874, now seen corresponding path program 28 times [2021-05-02 18:19:53,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:53,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110940257] [2021-05-02 18:19:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:53,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 18:19:53,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:53,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110940257] [2021-05-02 18:19:53,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110940257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:53,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774180357] [2021-05-02 18:19:53,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:53,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:19:53,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 18:19:53,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:53,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 18:19:53,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774180357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:53,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:53,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2021-05-02 18:19:53,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626064126] [2021-05-02 18:19:53,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 18:19:53,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:53,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 18:19:53,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 18:19:53,862 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:54,960 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2021-05-02 18:19:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 18:19:54,961 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-02 18:19:54,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:54,961 INFO L225 Difference]: With dead ends: 94 [2021-05-02 18:19:54,961 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 18:19:54,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1382.2ms TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 18:19:54,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 18:19:54,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-02 18:19:54,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 89 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-05-02 18:19:54,964 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 91 [2021-05-02 18:19:54,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:54,964 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-05-02 18:19:54,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:54,965 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-05-02 18:19:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 18:19:54,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:54,965 INFO L523 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:55,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 18:19:55,173 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:55,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:55,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1296870632, now seen corresponding path program 29 times [2021-05-02 18:19:55,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:55,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115588183] [2021-05-02 18:19:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:55,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 18:19:55,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:55,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115588183] [2021-05-02 18:19:55,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115588183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:55,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285788280] [2021-05-02 18:19:55,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:55,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-05-02 18:19:55,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:55,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 18:19:55,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:55,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 18:19:55,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285788280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:55,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:55,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 18:19:55,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627520132] [2021-05-02 18:19:55,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 18:19:55,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:55,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 18:19:55,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 18:19:55,920 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:57,014 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2021-05-02 18:19:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 18:19:57,014 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 18:19:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:57,015 INFO L225 Difference]: With dead ends: 96 [2021-05-02 18:19:57,015 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 18:19:57,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1383.1ms TimeCoverageRelationStatistics Valid=1821, Invalid=3009, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 18:19:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 18:19:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-02 18:19:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-05-02 18:19:57,018 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 93 [2021-05-02 18:19:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:57,018 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-05-02 18:19:57,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-05-02 18:19:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 18:19:57,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:57,019 INFO L523 BasicCegarLoop]: trace histogram [42, 33, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:57,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:57,233 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:57,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:57,233 INFO L82 PathProgramCache]: Analyzing trace with hash 253885878, now seen corresponding path program 30 times [2021-05-02 18:19:57,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:57,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776643148] [2021-05-02 18:19:57,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:57,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 578 proven. 1122 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 18:19:57,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:57,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776643148] [2021-05-02 18:19:57,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776643148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:57,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287140272] [2021-05-02 18:19:57,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:57,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-05-02 18:19:57,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:19:57,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 18:19:57,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:57,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:57,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 627 proven. 81 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-05-02 18:19:58,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287140272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:58,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:58,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 12] total 47 [2021-05-02 18:19:58,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183682566] [2021-05-02 18:19:58,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 18:19:58,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:58,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 18:19:58,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 18:19:58,336 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:59,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:59,998 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2021-05-02 18:19:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 18:19:59,999 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-02 18:20:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:00,000 INFO L225 Difference]: With dead ends: 101 [2021-05-02 18:20:00,000 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 18:20:00,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 2258.8ms TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 18:20:00,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 18:20:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-05-02 18:20:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 95 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:00,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2021-05-02 18:20:00,004 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 95 [2021-05-02 18:20:00,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:00,004 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2021-05-02 18:20:00,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2021-05-02 18:20:00,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 18:20:00,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:00,004 INFO L523 BasicCegarLoop]: trace histogram [44, 34, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:00,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 18:20:00,205 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:00,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:00,206 INFO L82 PathProgramCache]: Analyzing trace with hash -531745967, now seen corresponding path program 31 times [2021-05-02 18:20:00,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:00,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931188462] [2021-05-02 18:20:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:00,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 18:20:00,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:00,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931188462] [2021-05-02 18:20:00,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931188462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:00,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338298018] [2021-05-02 18:20:00,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:00,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 18:20:00,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:00,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:00,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 18:20:01,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338298018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:01,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:01,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2021-05-02 18:20:01,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752205260] [2021-05-02 18:20:01,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 18:20:01,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:01,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 18:20:01,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 18:20:01,084 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:02,279 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2021-05-02 18:20:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 18:20:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-02 18:20:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:02,280 INFO L225 Difference]: With dead ends: 102 [2021-05-02 18:20:02,281 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 18:20:02,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1597.2ms TimeCoverageRelationStatistics Valid=2036, Invalid=3366, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 18:20:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 18:20:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-05-02 18:20:02,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 97 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2021-05-02 18:20:02,284 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 99 [2021-05-02 18:20:02,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:02,284 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2021-05-02 18:20:02,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:02,284 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2021-05-02 18:20:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 18:20:02,285 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:02,285 INFO L523 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:02,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 18:20:02,497 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:02,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1001254767, now seen corresponding path program 32 times [2021-05-02 18:20:02,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:02,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431288795] [2021-05-02 18:20:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:03,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 18:20:03,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:03,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431288795] [2021-05-02 18:20:03,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431288795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:03,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342769793] [2021-05-02 18:20:03,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:03,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:20:03,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:03,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 18:20:03,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:03,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 18:20:03,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342769793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:03,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:03,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 18:20:03,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824136803] [2021-05-02 18:20:03,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 18:20:03,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:03,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 18:20:03,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 18:20:03,457 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:04,846 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2021-05-02 18:20:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 18:20:04,846 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-02 18:20:04,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:04,847 INFO L225 Difference]: With dead ends: 104 [2021-05-02 18:20:04,847 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 18:20:04,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1746.7ms TimeCoverageRelationStatistics Valid=2148, Invalid=3552, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 18:20:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 18:20:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-05-02 18:20:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2021-05-02 18:20:04,850 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 101 [2021-05-02 18:20:04,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:04,851 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2021-05-02 18:20:04,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2021-05-02 18:20:04,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 18:20:04,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:04,851 INFO L523 BasicCegarLoop]: trace histogram [46, 36, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:05,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 18:20:05,055 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:05,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:05,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1041177613, now seen corresponding path program 33 times [2021-05-02 18:20:05,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:05,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790686754] [2021-05-02 18:20:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:05,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 703 proven. 1332 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 18:20:05,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:05,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790686754] [2021-05-02 18:20:05,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790686754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:05,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325327018] [2021-05-02 18:20:05,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:05,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 18:20:05,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:05,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 18:20:05,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:05,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:05,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:05,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:05,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:05,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:05,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 756 proven. 100 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2021-05-02 18:20:06,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325327018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:06,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:06,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 13] total 51 [2021-05-02 18:20:06,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242247948] [2021-05-02 18:20:06,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 18:20:06,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:06,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 18:20:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 18:20:06,361 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 50 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:08,263 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2021-05-02 18:20:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 18:20:08,264 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 50 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-05-02 18:20:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:08,265 INFO L225 Difference]: With dead ends: 109 [2021-05-02 18:20:08,265 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 18:20:08,265 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 2670.0ms TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 18:20:08,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 18:20:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-05-02 18:20:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.116504854368932) internal successors, (115), 103 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2021-05-02 18:20:08,268 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 103 [2021-05-02 18:20:08,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:08,269 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2021-05-02 18:20:08,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 50 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2021-05-02 18:20:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 18:20:08,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:08,270 INFO L523 BasicCegarLoop]: trace histogram [48, 37, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:08,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 18:20:08,495 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:08,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1924228632, now seen corresponding path program 34 times [2021-05-02 18:20:08,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:08,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519813610] [2021-05-02 18:20:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:09,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 18:20:09,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:09,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519813610] [2021-05-02 18:20:09,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519813610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:09,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567971403] [2021-05-02 18:20:09,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:09,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:20:09,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:09,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 18:20:09,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:09,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 18:20:09,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567971403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:09,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:09,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2021-05-02 18:20:09,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043353830] [2021-05-02 18:20:09,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 18:20:09,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:09,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 18:20:09,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 18:20:09,440 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:10,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:10,844 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-05-02 18:20:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 18:20:10,844 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2021-05-02 18:20:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:10,845 INFO L225 Difference]: With dead ends: 110 [2021-05-02 18:20:10,845 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 18:20:10,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1829.0ms TimeCoverageRelationStatistics Valid=2381, Invalid=3939, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 18:20:10,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 18:20:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-02 18:20:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.1142857142857143) internal successors, (117), 105 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-05-02 18:20:10,848 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 107 [2021-05-02 18:20:10,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:10,848 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-05-02 18:20:10,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-05-02 18:20:10,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 18:20:10,849 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:10,849 INFO L523 BasicCegarLoop]: trace histogram [49, 38, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:11,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 18:20:11,057 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1154000890, now seen corresponding path program 35 times [2021-05-02 18:20:11,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:11,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001051452] [2021-05-02 18:20:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:11,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 18:20:11,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:11,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001051452] [2021-05-02 18:20:11,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001051452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:11,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029745357] [2021-05-02 18:20:11,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:11,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2021-05-02 18:20:11,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:11,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 18:20:11,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:11,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:11,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:11,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:11,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:11,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:11,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:11,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:11,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:11,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:11,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:11,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:11,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:11,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 18:20:12,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029745357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:12,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:12,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 18:20:12,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602109638] [2021-05-02 18:20:12,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 18:20:12,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:12,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 18:20:12,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 18:20:12,172 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:13,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:13,637 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2021-05-02 18:20:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 18:20:13,637 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2021-05-02 18:20:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:13,638 INFO L225 Difference]: With dead ends: 112 [2021-05-02 18:20:13,638 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 18:20:13,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1883.5ms TimeCoverageRelationStatistics Valid=2502, Invalid=4140, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 18:20:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 18:20:13,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 18:20:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 107 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2021-05-02 18:20:13,641 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 109 [2021-05-02 18:20:13,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:13,642 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2021-05-02 18:20:13,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2021-05-02 18:20:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 18:20:13,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:13,643 INFO L523 BasicCegarLoop]: trace histogram [50, 39, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:13,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 18:20:13,849 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:13,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:13,849 INFO L82 PathProgramCache]: Analyzing trace with hash 300484260, now seen corresponding path program 36 times [2021-05-02 18:20:13,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:13,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673688493] [2021-05-02 18:20:13,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:14,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 840 proven. 1560 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 18:20:14,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:14,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673688493] [2021-05-02 18:20:14,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673688493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:14,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570257269] [2021-05-02 18:20:14,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:14,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-05-02 18:20:14,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:14,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 18:20:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:14,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:14,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:14,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:14,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:14,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:14,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:14,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:14,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:14,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:14,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 897 proven. 121 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-05-02 18:20:15,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570257269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:15,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:15,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 14] total 55 [2021-05-02 18:20:15,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462871354] [2021-05-02 18:20:15,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 18:20:15,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:15,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 18:20:15,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 18:20:15,353 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:17,612 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2021-05-02 18:20:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 18:20:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-05-02 18:20:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:17,613 INFO L225 Difference]: With dead ends: 117 [2021-05-02 18:20:17,613 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 18:20:17,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 3172.9ms TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 18:20:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 18:20:17,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-05-02 18:20:17,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.117117117117117) internal successors, (124), 111 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:17,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2021-05-02 18:20:17,617 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 111 [2021-05-02 18:20:17,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:17,617 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2021-05-02 18:20:17,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:17,618 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2021-05-02 18:20:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-02 18:20:17,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:17,618 INFO L523 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:17,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 18:20:17,833 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:17,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1500005185, now seen corresponding path program 37 times [2021-05-02 18:20:17,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:17,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943561173] [2021-05-02 18:20:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:18,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-02 18:20:18,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:18,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943561173] [2021-05-02 18:20:18,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943561173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:18,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567971327] [2021-05-02 18:20:18,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:18,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 18:20:18,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:18,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-02 18:20:18,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567971327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:18,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:18,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2021-05-02 18:20:18,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018492549] [2021-05-02 18:20:18,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 18:20:18,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:18,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 18:20:18,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 18:20:18,943 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:20,479 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2021-05-02 18:20:20,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 18:20:20,479 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-05-02 18:20:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:20,480 INFO L225 Difference]: With dead ends: 118 [2021-05-02 18:20:20,480 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 18:20:20,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 2034.0ms TimeCoverageRelationStatistics Valid=2753, Invalid=4557, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 18:20:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 18:20:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-05-02 18:20:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 113 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:20,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2021-05-02 18:20:20,484 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 115 [2021-05-02 18:20:20,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:20,484 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2021-05-02 18:20:20,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:20,484 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2021-05-02 18:20:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 18:20:20,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:20,485 INFO L523 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:20,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:20,689 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:20,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:20,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1763214115, now seen corresponding path program 38 times [2021-05-02 18:20:20,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:20,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690790316] [2021-05-02 18:20:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:21,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-02 18:20:21,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:21,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690790316] [2021-05-02 18:20:21,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690790316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:21,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315698186] [2021-05-02 18:20:21,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:21,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:20:21,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:21,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 18:20:21,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:21,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-02 18:20:21,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315698186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:21,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:21,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 18:20:21,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091009605] [2021-05-02 18:20:21,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 18:20:21,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:21,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 18:20:21,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 18:20:21,846 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:23,442 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-05-02 18:20:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 18:20:23,443 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2021-05-02 18:20:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:23,443 INFO L225 Difference]: With dead ends: 120 [2021-05-02 18:20:23,443 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 18:20:23,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2164.1ms TimeCoverageRelationStatistics Valid=2883, Invalid=4773, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 18:20:23,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 18:20:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-05-02 18:20:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.1130434782608696) internal successors, (128), 115 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2021-05-02 18:20:23,446 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 117 [2021-05-02 18:20:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:23,447 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2021-05-02 18:20:23,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2021-05-02 18:20:23,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-02 18:20:23,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:23,447 INFO L523 BasicCegarLoop]: trace histogram [54, 42, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:23,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:23,665 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:23,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1303925381, now seen corresponding path program 39 times [2021-05-02 18:20:23,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:23,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940878178] [2021-05-02 18:20:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:24,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 989 proven. 1806 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-02 18:20:24,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:24,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940878178] [2021-05-02 18:20:24,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940878178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:24,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543138851] [2021-05-02 18:20:24,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:24,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-05-02 18:20:24,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:24,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 18:20:24,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:24,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:24,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:25,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:25,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:25,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:25,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:25,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:25,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:25,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:25,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:25,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:25,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1050 proven. 144 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-05-02 18:20:25,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543138851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:25,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:25,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 15] total 59 [2021-05-02 18:20:25,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027340675] [2021-05-02 18:20:25,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 18:20:25,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:25,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 18:20:25,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 18:20:25,292 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:27,870 INFO L93 Difference]: Finished difference Result 125 states and 139 transitions. [2021-05-02 18:20:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 18:20:27,870 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2021-05-02 18:20:27,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:27,871 INFO L225 Difference]: With dead ends: 125 [2021-05-02 18:20:27,871 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 18:20:27,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 3606.5ms TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 18:20:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 18:20:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-05-02 18:20:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.1176470588235294) internal successors, (133), 119 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2021-05-02 18:20:27,875 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 119 [2021-05-02 18:20:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:27,875 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2021-05-02 18:20:27,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2021-05-02 18:20:27,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 18:20:27,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:27,876 INFO L523 BasicCegarLoop]: trace histogram [56, 43, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:28,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:28,100 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:28,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:28,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1887073322, now seen corresponding path program 40 times [2021-05-02 18:20:28,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:28,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305651821] [2021-05-02 18:20:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:28,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 18:20:28,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:28,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305651821] [2021-05-02 18:20:28,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305651821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:28,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838673454] [2021-05-02 18:20:28,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:29,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:20:29,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:29,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 18:20:29,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:29,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 18:20:29,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838673454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:29,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:29,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2021-05-02 18:20:29,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875018627] [2021-05-02 18:20:29,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 18:20:29,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:29,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 18:20:29,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 18:20:29,273 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:30,950 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2021-05-02 18:20:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 18:20:30,951 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-05-02 18:20:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:30,952 INFO L225 Difference]: With dead ends: 126 [2021-05-02 18:20:30,952 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 18:20:30,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 2299.5ms TimeCoverageRelationStatistics Valid=3152, Invalid=5220, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 18:20:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 18:20:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-05-02 18:20:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.115702479338843) internal successors, (135), 121 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 139 transitions. [2021-05-02 18:20:30,955 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 139 transitions. Word has length 123 [2021-05-02 18:20:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:30,955 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 139 transitions. [2021-05-02 18:20:30,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:30,956 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 139 transitions. [2021-05-02 18:20:30,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-02 18:20:30,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:30,956 INFO L523 BasicCegarLoop]: trace histogram [57, 44, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:31,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 18:20:31,173 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:31,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:31,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1947880948, now seen corresponding path program 41 times [2021-05-02 18:20:31,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:31,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79913101] [2021-05-02 18:20:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:32,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 18:20:32,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:32,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79913101] [2021-05-02 18:20:32,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79913101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:32,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607535596] [2021-05-02 18:20:32,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:32,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2021-05-02 18:20:32,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:32,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 18:20:32,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:32,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 18:20:32,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607535596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:32,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:32,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 18:20:32,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237945652] [2021-05-02 18:20:32,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 18:20:32,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:32,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 18:20:32,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 18:20:32,366 INFO L87 Difference]: Start difference. First operand 126 states and 139 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:34,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:34,103 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-05-02 18:20:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 18:20:34,103 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2021-05-02 18:20:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:34,104 INFO L225 Difference]: With dead ends: 128 [2021-05-02 18:20:34,104 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 18:20:34,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2368.3ms TimeCoverageRelationStatistics Valid=3291, Invalid=5451, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 18:20:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 18:20:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-05-02 18:20:34,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:34,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2021-05-02 18:20:34,108 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 125 [2021-05-02 18:20:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:34,108 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2021-05-02 18:20:34,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2021-05-02 18:20:34,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 18:20:34,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:34,109 INFO L523 BasicCegarLoop]: trace histogram [58, 45, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:34,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:34,325 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:34,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:34,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2037972846, now seen corresponding path program 42 times [2021-05-02 18:20:34,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:34,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301324548] [2021-05-02 18:20:34,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:35,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1150 proven. 2070 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 18:20:35,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:35,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301324548] [2021-05-02 18:20:35,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301324548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:35,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24300731] [2021-05-02 18:20:35,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:35,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-05-02 18:20:35,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:35,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 18:20:35,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:35,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:35,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:36,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:36,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:36,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:36,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:36,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:36,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1215 proven. 169 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2021-05-02 18:20:36,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24300731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:36,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:36,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 16] total 63 [2021-05-02 18:20:36,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532859705] [2021-05-02 18:20:36,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 18:20:36,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:36,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 18:20:36,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 18:20:36,166 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:39,133 INFO L93 Difference]: Finished difference Result 133 states and 148 transitions. [2021-05-02 18:20:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 18:20:39,134 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2021-05-02 18:20:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:39,134 INFO L225 Difference]: With dead ends: 133 [2021-05-02 18:20:39,134 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 18:20:39,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 4066.9ms TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 18:20:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 18:20:39,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-05-02 18:20:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.1181102362204725) internal successors, (142), 127 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2021-05-02 18:20:39,138 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 127 [2021-05-02 18:20:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:39,139 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2021-05-02 18:20:39,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2021-05-02 18:20:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 18:20:39,139 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:39,140 INFO L523 BasicCegarLoop]: trace histogram [60, 46, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:39,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:39,353 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:39,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:39,353 INFO L82 PathProgramCache]: Analyzing trace with hash 171439917, now seen corresponding path program 43 times [2021-05-02 18:20:39,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:39,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921100668] [2021-05-02 18:20:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:40,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 18:20:40,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:40,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921100668] [2021-05-02 18:20:40,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921100668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:40,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370045378] [2021-05-02 18:20:40,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:40,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 18:20:40,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:40,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 18:20:40,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370045378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:40,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:40,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2021-05-02 18:20:40,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244832718] [2021-05-02 18:20:40,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 18:20:40,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:40,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 18:20:40,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 18:20:40,655 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:42,593 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2021-05-02 18:20:42,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 18:20:42,593 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2021-05-02 18:20:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:42,594 INFO L225 Difference]: With dead ends: 134 [2021-05-02 18:20:42,594 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 18:20:42,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 2639.5ms TimeCoverageRelationStatistics Valid=3578, Invalid=5928, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 18:20:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 18:20:42,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-05-02 18:20:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.1162790697674418) internal successors, (144), 129 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2021-05-02 18:20:42,598 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 131 [2021-05-02 18:20:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:42,598 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2021-05-02 18:20:42,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2021-05-02 18:20:42,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-02 18:20:42,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:42,599 INFO L523 BasicCegarLoop]: trace histogram [61, 47, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:42,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 18:20:42,809 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:42,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1458551627, now seen corresponding path program 44 times [2021-05-02 18:20:42,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:42,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668470480] [2021-05-02 18:20:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:43,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 18:20:43,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:43,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668470480] [2021-05-02 18:20:43,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668470480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:43,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325708835] [2021-05-02 18:20:43,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:44,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:20:44,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:44,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 18:20:44,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:44,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 18:20:44,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325708835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:44,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:44,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 18:20:44,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186921598] [2021-05-02 18:20:44,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 18:20:44,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:44,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 18:20:44,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 18:20:44,252 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:46,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:46,252 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2021-05-02 18:20:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 18:20:46,252 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2021-05-02 18:20:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:46,253 INFO L225 Difference]: With dead ends: 136 [2021-05-02 18:20:46,253 INFO L226 Difference]: Without dead ends: 136 [2021-05-02 18:20:46,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 2786.1ms TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 18:20:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-02 18:20:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-05-02 18:20:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.1145038167938932) internal successors, (146), 131 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:46,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2021-05-02 18:20:46,257 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 133 [2021-05-02 18:20:46,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:46,257 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2021-05-02 18:20:46,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2021-05-02 18:20:46,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 18:20:46,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:46,258 INFO L523 BasicCegarLoop]: trace histogram [62, 48, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:46,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 18:20:46,473 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:46,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:46,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1422323689, now seen corresponding path program 45 times [2021-05-02 18:20:46,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:46,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572879877] [2021-05-02 18:20:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:47,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1323 proven. 2352 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 18:20:47,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:47,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572879877] [2021-05-02 18:20:47,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572879877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:47,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792023715] [2021-05-02 18:20:47,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:47,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-05-02 18:20:47,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:47,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 18:20:47,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:47,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:47,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:47,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:47,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1392 proven. 196 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2021-05-02 18:20:48,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792023715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:48,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:48,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 17] total 67 [2021-05-02 18:20:48,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316251874] [2021-05-02 18:20:48,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 18:20:48,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:48,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 18:20:48,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 18:20:48,689 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:51,739 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2021-05-02 18:20:51,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 18:20:51,740 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-05-02 18:20:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:51,740 INFO L225 Difference]: With dead ends: 141 [2021-05-02 18:20:51,740 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 18:20:51,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 4650.2ms TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 18:20:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 18:20:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-05-02 18:20:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 135 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 155 transitions. [2021-05-02 18:20:51,744 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 155 transitions. Word has length 135 [2021-05-02 18:20:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:51,744 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 155 transitions. [2021-05-02 18:20:51,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 155 transitions. [2021-05-02 18:20:51,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-02 18:20:51,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:51,745 INFO L523 BasicCegarLoop]: trace histogram [64, 49, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:51,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 18:20:51,970 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:51,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:51,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1768755516, now seen corresponding path program 46 times [2021-05-02 18:20:51,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:51,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383538990] [2021-05-02 18:20:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:53,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 18:20:53,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:53,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383538990] [2021-05-02 18:20:53,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383538990] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:53,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964765271] [2021-05-02 18:20:53,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:53,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:20:53,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:53,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 18:20:53,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:53,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 18:20:53,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964765271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:53,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:53,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2021-05-02 18:20:53,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577556995] [2021-05-02 18:20:53,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 18:20:53,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:53,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 18:20:53,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 18:20:53,529 INFO L87 Difference]: Start difference. First operand 140 states and 155 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:20:55,681 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2021-05-02 18:20:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 18:20:55,681 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2021-05-02 18:20:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:20:55,682 INFO L225 Difference]: With dead ends: 142 [2021-05-02 18:20:55,682 INFO L226 Difference]: Without dead ends: 142 [2021-05-02 18:20:55,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 2966.8ms TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 18:20:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-02 18:20:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-02 18:20:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.1167883211678833) internal successors, (153), 137 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 157 transitions. [2021-05-02 18:20:55,685 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 157 transitions. Word has length 139 [2021-05-02 18:20:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:20:55,685 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 157 transitions. [2021-05-02 18:20:55,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:20:55,686 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 157 transitions. [2021-05-02 18:20:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-05-02 18:20:55,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:20:55,686 INFO L523 BasicCegarLoop]: trace histogram [65, 50, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:20:55,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:55,901 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:20:55,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:20:55,901 INFO L82 PathProgramCache]: Analyzing trace with hash 21738722, now seen corresponding path program 47 times [2021-05-02 18:20:55,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:20:55,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656421378] [2021-05-02 18:20:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:20:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:57,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:20:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:20:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:20:57,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:20:57,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656421378] [2021-05-02 18:20:57,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656421378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:57,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406198689] [2021-05-02 18:20:57,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:20:57,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-05-02 18:20:57,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:20:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 18:20:57,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:20:57,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:57,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:58,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:59,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:59,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:59,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:59,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:59,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:20:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 1024 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-05-02 18:20:59,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406198689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:20:59,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:20:59,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 35] total 86 [2021-05-02 18:20:59,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294012895] [2021-05-02 18:20:59,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 18:20:59,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:20:59,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 18:20:59,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 18:20:59,211 INFO L87 Difference]: Start difference. First operand 142 states and 157 transitions. Second operand has 86 states, 86 states have (on average 2.2325581395348837) internal successors, (192), 85 states have internal predecessors, (192), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:04,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:21:04,052 INFO L93 Difference]: Finished difference Result 179 states and 213 transitions. [2021-05-02 18:21:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 18:21:04,052 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2325581395348837) internal successors, (192), 85 states have internal predecessors, (192), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2021-05-02 18:21:04,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:21:04,053 INFO L225 Difference]: With dead ends: 179 [2021-05-02 18:21:04,053 INFO L226 Difference]: Without dead ends: 179 [2021-05-02 18:21:04,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3483 ImplicationChecksByTransitivity, 7261.9ms TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2021-05-02 18:21:04,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-02 18:21:04,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2021-05-02 18:21:04,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.1965317919075145) internal successors, (207), 173 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 211 transitions. [2021-05-02 18:21:04,057 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 211 transitions. Word has length 141 [2021-05-02 18:21:04,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:21:04,057 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 211 transitions. [2021-05-02 18:21:04,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.2325581395348837) internal successors, (192), 85 states have internal predecessors, (192), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 211 transitions. [2021-05-02 18:21:04,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-05-02 18:21:04,059 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:21:04,059 INFO L523 BasicCegarLoop]: trace histogram [83, 50, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:21:04,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:21:04,273 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:21:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:21:04,273 INFO L82 PathProgramCache]: Analyzing trace with hash 604965228, now seen corresponding path program 48 times [2021-05-02 18:21:04,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:21:04,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89535119] [2021-05-02 18:21:04,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:21:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:07,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:21:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:21:07,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:21:07,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89535119] [2021-05-02 18:21:07,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89535119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:21:07,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121869075] [2021-05-02 18:21:07,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:21:07,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2021-05-02 18:21:07,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:21:07,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 18:21:07,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:21:07,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:07,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:08,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:08,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:08,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:08,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:08,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:08,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:08,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:08,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:08,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:08,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:08,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:08,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3486 proven. 1681 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-05-02 18:21:08,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121869075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:21:08,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:21:08,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 44] total 95 [2021-05-02 18:21:08,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473099726] [2021-05-02 18:21:08,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 18:21:08,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:21:08,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 18:21:08,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 18:21:08,562 INFO L87 Difference]: Start difference. First operand 178 states and 211 transitions. Second operand has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:21:14,654 INFO L93 Difference]: Finished difference Result 197 states and 240 transitions. [2021-05-02 18:21:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 18:21:14,654 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2021-05-02 18:21:14,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:21:14,657 INFO L225 Difference]: With dead ends: 197 [2021-05-02 18:21:14,657 INFO L226 Difference]: Without dead ends: 197 [2021-05-02 18:21:14,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4302 ImplicationChecksByTransitivity, 9189.0ms TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2021-05-02 18:21:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-02 18:21:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-05-02 18:21:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.225130890052356) internal successors, (234), 191 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 238 transitions. [2021-05-02 18:21:14,662 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 238 transitions. Word has length 177 [2021-05-02 18:21:14,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:21:14,662 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 238 transitions. [2021-05-02 18:21:14,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 238 transitions. [2021-05-02 18:21:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-02 18:21:14,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:21:14,663 INFO L523 BasicCegarLoop]: trace histogram [92, 50, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:21:14,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:21:14,885 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:21:14,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:21:14,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2090283823, now seen corresponding path program 49 times [2021-05-02 18:21:14,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:21:14,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455361348] [2021-05-02 18:21:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:21:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:18,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:21:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:21:18,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:21:18,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455361348] [2021-05-02 18:21:18,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455361348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:21:18,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280444490] [2021-05-02 18:21:18,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:21:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:18,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 94 conjunts are in the unsatisfiable core [2021-05-02 18:21:18,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:21:18,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:18,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:21:19,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280444490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:21:19,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:21:19,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95] total 97 [2021-05-02 18:21:19,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448130384] [2021-05-02 18:21:19,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 18:21:19,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:21:19,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 18:21:19,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 18:21:19,058 INFO L87 Difference]: Start difference. First operand 196 states and 238 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:21:25,265 INFO L93 Difference]: Finished difference Result 199 states and 243 transitions. [2021-05-02 18:21:25,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 18:21:25,265 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2021-05-02 18:21:25,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:21:25,266 INFO L225 Difference]: With dead ends: 199 [2021-05-02 18:21:25,266 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 18:21:25,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 9170.7ms TimeCoverageRelationStatistics Valid=13491, Invalid=22419, Unknown=0, NotChecked=0, Total=35910 [2021-05-02 18:21:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 18:21:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2021-05-02 18:21:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.2279792746113989) internal successors, (237), 193 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 241 transitions. [2021-05-02 18:21:25,270 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 241 transitions. Word has length 195 [2021-05-02 18:21:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:21:25,271 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 241 transitions. [2021-05-02 18:21:25,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 241 transitions. [2021-05-02 18:21:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-02 18:21:25,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:21:25,272 INFO L523 BasicCegarLoop]: trace histogram [93, 50, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:21:25,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:21:25,496 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:21:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:21:25,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2073986034, now seen corresponding path program 50 times [2021-05-02 18:21:25,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:21:25,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354049653] [2021-05-02 18:21:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:21:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:29,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:21:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:21:29,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:21:29,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354049653] [2021-05-02 18:21:29,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354049653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:21:29,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527632677] [2021-05-02 18:21:29,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:21:29,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:21:29,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:21:29,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 18:21:29,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:21:29,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:21:29,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527632677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:21:29,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:21:29,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96] total 98 [2021-05-02 18:21:29,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254514389] [2021-05-02 18:21:29,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 18:21:29,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:21:29,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 18:21:29,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 18:21:29,762 INFO L87 Difference]: Start difference. First operand 198 states and 241 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:36,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:21:36,128 INFO L93 Difference]: Finished difference Result 201 states and 246 transitions. [2021-05-02 18:21:36,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 18:21:36,129 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2021-05-02 18:21:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:21:36,130 INFO L225 Difference]: With dead ends: 201 [2021-05-02 18:21:36,130 INFO L226 Difference]: Without dead ends: 201 [2021-05-02 18:21:36,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4740 ImplicationChecksByTransitivity, 9246.1ms TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2021-05-02 18:21:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-02 18:21:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2021-05-02 18:21:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.2307692307692308) internal successors, (240), 195 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 244 transitions. [2021-05-02 18:21:36,133 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 244 transitions. Word has length 197 [2021-05-02 18:21:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:21:36,134 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 244 transitions. [2021-05-02 18:21:36,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 244 transitions. [2021-05-02 18:21:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-05-02 18:21:36,135 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:21:36,135 INFO L523 BasicCegarLoop]: trace histogram [94, 50, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:21:36,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-02 18:21:36,349 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:21:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:21:36,349 INFO L82 PathProgramCache]: Analyzing trace with hash 703287307, now seen corresponding path program 51 times [2021-05-02 18:21:36,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:21:36,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747321974] [2021-05-02 18:21:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:21:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:40,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:21:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:21:40,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:21:40,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747321974] [2021-05-02 18:21:40,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747321974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:21:40,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338069189] [2021-05-02 18:21:40,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:21:40,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2021-05-02 18:21:40,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:21:40,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 18:21:40,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:21:40,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 4450 proven. 1936 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-05-02 18:21:40,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338069189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:21:40,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:21:40,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 47] total 98 [2021-05-02 18:21:40,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660019884] [2021-05-02 18:21:40,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 18:21:40,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:21:40,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 18:21:40,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 18:21:40,839 INFO L87 Difference]: Start difference. First operand 200 states and 244 transitions. Second operand has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:21:47,463 INFO L93 Difference]: Finished difference Result 203 states and 249 transitions. [2021-05-02 18:21:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 18:21:47,464 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2021-05-02 18:21:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:21:47,465 INFO L225 Difference]: With dead ends: 203 [2021-05-02 18:21:47,465 INFO L226 Difference]: Without dead ends: 203 [2021-05-02 18:21:47,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4603 ImplicationChecksByTransitivity, 9761.4ms TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2021-05-02 18:21:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-02 18:21:47,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2021-05-02 18:21:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.233502538071066) internal successors, (243), 197 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 247 transitions. [2021-05-02 18:21:47,469 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 247 transitions. Word has length 199 [2021-05-02 18:21:47,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:21:47,469 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 247 transitions. [2021-05-02 18:21:47,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 247 transitions. [2021-05-02 18:21:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-05-02 18:21:47,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:21:47,470 INFO L523 BasicCegarLoop]: trace histogram [95, 50, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:21:47,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:21:47,677 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:21:47,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:21:47,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1806690104, now seen corresponding path program 52 times [2021-05-02 18:21:47,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:21:47,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238361338] [2021-05-02 18:21:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:21:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:51,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:21:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:21:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:21:51,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:21:51,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238361338] [2021-05-02 18:21:51,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238361338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:21:51,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771322130] [2021-05-02 18:21:51,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:21:51,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:21:51,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:21:51,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-02 18:21:51,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:21:51,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:51,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:21:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:21:52,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771322130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:21:52,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:21:52,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98] total 100 [2021-05-02 18:21:52,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969407920] [2021-05-02 18:21:52,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 18:21:52,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:21:52,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 18:21:52,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 18:21:52,257 INFO L87 Difference]: Start difference. First operand 202 states and 247 transitions. Second operand has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:21:58,910 INFO L93 Difference]: Finished difference Result 205 states and 252 transitions. [2021-05-02 18:21:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 18:21:58,911 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2021-05-02 18:21:58,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:21:58,912 INFO L225 Difference]: With dead ends: 205 [2021-05-02 18:21:58,912 INFO L226 Difference]: Without dead ends: 205 [2021-05-02 18:21:58,914 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4937 ImplicationChecksByTransitivity, 9877.2ms TimeCoverageRelationStatistics Valid=14358, Invalid=23862, Unknown=0, NotChecked=0, Total=38220 [2021-05-02 18:21:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-02 18:21:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-05-02 18:21:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.236180904522613) internal successors, (246), 199 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 250 transitions. [2021-05-02 18:21:58,917 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 250 transitions. Word has length 201 [2021-05-02 18:21:58,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:21:58,917 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 250 transitions. [2021-05-02 18:21:58,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:21:58,918 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 250 transitions. [2021-05-02 18:21:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-05-02 18:21:58,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:21:58,919 INFO L523 BasicCegarLoop]: trace histogram [96, 50, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:21:59,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 18:21:59,125 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:21:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:21:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash -123361723, now seen corresponding path program 53 times [2021-05-02 18:21:59,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:21:59,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157856571] [2021-05-02 18:21:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:21:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:03,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:22:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:03,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:03,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157856571] [2021-05-02 18:22:03,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157856571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:03,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915417834] [2021-05-02 18:22:03,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:03,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2021-05-02 18:22:03,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:03,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 18:22:03,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:03,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 4656 proven. 2304 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2021-05-02 18:22:03,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915417834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:03,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:22:03,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 51] total 102 [2021-05-02 18:22:03,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691703464] [2021-05-02 18:22:03,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 18:22:03,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:03,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 18:22:03,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 18:22:03,978 INFO L87 Difference]: Start difference. First operand 204 states and 250 transitions. Second operand has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 101 states have internal predecessors, (211), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:11,173 INFO L93 Difference]: Finished difference Result 211 states and 261 transitions. [2021-05-02 18:22:11,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 18:22:11,173 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 101 states have internal predecessors, (211), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2021-05-02 18:22:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:11,174 INFO L225 Difference]: With dead ends: 211 [2021-05-02 18:22:11,174 INFO L226 Difference]: Without dead ends: 211 [2021-05-02 18:22:11,175 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4993 ImplicationChecksByTransitivity, 10680.8ms TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2021-05-02 18:22:11,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-02 18:22:11,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2021-05-02 18:22:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.2439024390243902) internal successors, (255), 205 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 259 transitions. [2021-05-02 18:22:11,178 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 259 transitions. Word has length 203 [2021-05-02 18:22:11,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:11,179 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 259 transitions. [2021-05-02 18:22:11,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 101 states have internal predecessors, (211), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 259 transitions. [2021-05-02 18:22:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-05-02 18:22:11,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:11,180 INFO L523 BasicCegarLoop]: trace histogram [99, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:11,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-02 18:22:11,385 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:11,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1293486908, now seen corresponding path program 54 times [2021-05-02 18:22:11,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:11,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547107440] [2021-05-02 18:22:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:15,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:22:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:15,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:15,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547107440] [2021-05-02 18:22:15,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547107440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:15,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140711567] [2021-05-02 18:22:15,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:15,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 99 check-sat command(s) [2021-05-02 18:22:15,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:22:15,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 18:22:15,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:16,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 4950 proven. 2401 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-05-02 18:22:16,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140711567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:16,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:22:16,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 52] total 103 [2021-05-02 18:22:16,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397106833] [2021-05-02 18:22:16,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 18:22:16,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 18:22:16,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 18:22:16,304 INFO L87 Difference]: Start difference. First operand 210 states and 259 transitions. Second operand has 103 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 102 states have internal predecessors, (210), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:23,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:23,604 INFO L93 Difference]: Finished difference Result 212 states and 262 transitions. [2021-05-02 18:22:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-02 18:22:23,605 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 102 states have internal predecessors, (210), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2021-05-02 18:22:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:23,605 INFO L225 Difference]: With dead ends: 212 [2021-05-02 18:22:23,606 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 18:22:23,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5098 ImplicationChecksByTransitivity, 10704.9ms TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2021-05-02 18:22:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 18:22:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-05-02 18:22:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.2463768115942029) internal successors, (258), 207 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 262 transitions. [2021-05-02 18:22:23,609 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 262 transitions. Word has length 209 [2021-05-02 18:22:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:23,609 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 262 transitions. [2021-05-02 18:22:23,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 102 states have internal predecessors, (210), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 262 transitions. [2021-05-02 18:22:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-05-02 18:22:23,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:23,610 INFO L523 BasicCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:23,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:23,811 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1560556615, now seen corresponding path program 55 times [2021-05-02 18:22:23,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:23,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398474963] [2021-05-02 18:22:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:25,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:22:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-05-02 18:22:25,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:25,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398474963] [2021-05-02 18:22:25,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398474963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:25,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036921860] [2021-05-02 18:22:25,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:22:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:25,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 108 conjunts are in the unsatisfiable core [2021-05-02 18:22:25,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:26,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:26,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:26,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-05-02 18:22:26,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036921860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:26,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:22:26,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 58 [2021-05-02 18:22:26,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989106956] [2021-05-02 18:22:26,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 18:22:26,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:26,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 18:22:26,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 18:22:26,399 INFO L87 Difference]: Start difference. First operand 212 states and 262 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:32,690 INFO L93 Difference]: Finished difference Result 2866 states and 4241 transitions. [2021-05-02 18:22:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 18:22:32,691 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2021-05-02 18:22:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:32,699 INFO L225 Difference]: With dead ends: 2866 [2021-05-02 18:22:32,699 INFO L226 Difference]: Without dead ends: 2863 [2021-05-02 18:22:32,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 209 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 4234.7ms TimeCoverageRelationStatistics Valid=332, Invalid=11878, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 18:22:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2021-05-02 18:22:32,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 214. [2021-05-02 18:22:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.2488038277511961) internal successors, (261), 209 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 265 transitions. [2021-05-02 18:22:32,720 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 265 transitions. Word has length 211 [2021-05-02 18:22:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:32,720 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 265 transitions. [2021-05-02 18:22:32,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 265 transitions. [2021-05-02 18:22:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-05-02 18:22:32,722 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:32,722 INFO L523 BasicCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:32,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-02 18:22:32,941 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:32,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:32,941 INFO L82 PathProgramCache]: Analyzing trace with hash 187719926, now seen corresponding path program 56 times [2021-05-02 18:22:32,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:32,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607441702] [2021-05-02 18:22:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:34,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:22:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-05-02 18:22:34,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:34,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607441702] [2021-05-02 18:22:34,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607441702] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:22:34,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:22:34,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 18:22:34,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703188279] [2021-05-02 18:22:34,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 18:22:34,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:34,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 18:22:34,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 18:22:34,321 INFO L87 Difference]: Start difference. First operand 214 states and 265 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:35,891 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2021-05-02 18:22:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 18:22:35,892 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2021-05-02 18:22:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:35,892 INFO L225 Difference]: With dead ends: 207 [2021-05-02 18:22:35,892 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:22:35,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2639.1ms TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 18:22:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:22:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:22:35,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 18:22:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:22:35,893 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 213 [2021-05-02 18:22:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:35,893 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:22:35,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:22:35,893 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:22:35,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 18:22:35,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:22:35 BasicIcfg [2021-05-02 18:22:35,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:22:35,897 INFO L168 Benchmark]: Toolchain (without parser) took 200643.17 ms. Allocated memory was 255.9 MB in the beginning and 483.4 MB in the end (delta: 227.5 MB). Free memory was 222.0 MB in the beginning and 239.0 MB in the end (delta: -17.0 MB). Peak memory consumption was 211.4 MB. Max. memory is 8.0 GB. [2021-05-02 18:22:35,897 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 255.9 MB. Free memory is still 238.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:22:35,897 INFO L168 Benchmark]: CACSL2BoogieTranslator took 183.45 ms. Allocated memory is still 255.9 MB. Free memory was 221.9 MB in the beginning and 212.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 18:22:35,897 INFO L168 Benchmark]: Boogie Preprocessor took 28.49 ms. Allocated memory is still 255.9 MB. Free memory was 212.3 MB in the beginning and 210.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:22:35,897 INFO L168 Benchmark]: RCFGBuilder took 428.67 ms. Allocated memory is still 255.9 MB. Free memory was 210.9 MB in the beginning and 227.1 MB in the end (delta: -16.3 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-02 18:22:35,897 INFO L168 Benchmark]: IcfgTransformer took 18.89 ms. Allocated memory is still 255.9 MB. Free memory was 227.1 MB in the beginning and 226.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:22:35,897 INFO L168 Benchmark]: TraceAbstraction took 199977.44 ms. Allocated memory was 255.9 MB in the beginning and 483.4 MB in the end (delta: 227.5 MB). Free memory was 225.4 MB in the beginning and 239.0 MB in the end (delta: -13.6 MB). Peak memory consumption was 214.3 MB. Max. memory is 8.0 GB. [2021-05-02 18:22:35,898 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 255.9 MB. Free memory is still 238.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 183.45 ms. Allocated memory is still 255.9 MB. Free memory was 221.9 MB in the beginning and 212.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.49 ms. Allocated memory is still 255.9 MB. Free memory was 212.3 MB in the beginning and 210.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 428.67 ms. Allocated memory is still 255.9 MB. Free memory was 210.9 MB in the beginning and 227.1 MB in the end (delta: -16.3 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * IcfgTransformer took 18.89 ms. Allocated memory is still 255.9 MB. Free memory was 227.1 MB in the beginning and 226.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 199977.44 ms. Allocated memory was 255.9 MB in the beginning and 483.4 MB in the end (delta: 227.5 MB). Free memory was 225.4 MB in the beginning and 239.0 MB in the end (delta: -13.6 MB). Peak memory consumption was 214.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 199929.7ms, OverallIterations: 60, TraceHistogramMax: 101, EmptinessCheckTime: 67.8ms, AutomataDifference: 111196.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 742 SDtfs, 4057 SDslu, 6622 SDs, 0 SdLazy, 21040 SolverSat, 4883 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11391.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10208 GetRequests, 5637 SyntacticMatches, 7 SemanticMatches, 4564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68566 ImplicationChecksByTransitivity, 150718.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=59, InterpolantAutomatonStates: 2413, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 231.7ms AutomataMinimizationTime, 60 MinimizatonAttempts, 2671 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 562.1ms SsaConstructionTime, 2938.6ms SatisfiabilityAnalysisTime, 71311.8ms InterpolantComputationTime, 10926 NumberOfCodeBlocks, 10566 NumberOfCodeBlocksAsserted, 1129 NumberOfCheckSat, 10810 ConstructedInterpolants, 0 QuantifiedInterpolants, 28620 SizeOfPredicates, 1 NumberOfNonLiveVariables, 14218 ConjunctsInSsa, 1652 ConjunctsInUnsatCore, 116 InterpolantComputations, 4 PerfectInterpolantSequences, 107648/293403 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...