/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/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:51:06,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:51:06,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:51:06,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:51:06,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:51:06,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:51:06,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:51:06,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:51:06,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:51:06,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:51:06,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:51:06,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:51:06,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:51:06,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:51:06,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:51:06,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:51:06,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:51:06,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:51:06,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:51:06,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:51:06,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:51:06,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:51:06,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:51:06,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:51:06,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:51:06,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:51:06,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:51:06,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:51:06,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:51:06,929 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:51:06,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:51:06,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:51:06,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:51:06,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:51:06,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:51:06,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:51:06,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:51:06,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:51:06,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:51:06,931 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:51:06,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:51:06,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:51:06,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:51:06,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:51:06,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:51:06,932 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:51:06,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:51:06,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:51:06,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:51:06,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:51:06,933 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:51:06,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:51:07,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:51:07,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:51:07,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:51:07,206 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:51:07,208 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:51:07,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2021-05-02 18:51:07,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35bfce0c4/8888bfc1461f45309dd4130e7fe6ee4d/FLAG52b8b7181 [2021-05-02 18:51:07,644 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:51:07,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2021-05-02 18:51:07,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35bfce0c4/8888bfc1461f45309dd4130e7fe6ee4d/FLAG52b8b7181 [2021-05-02 18:51:07,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35bfce0c4/8888bfc1461f45309dd4130e7fe6ee4d [2021-05-02 18:51:07,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:51:07,672 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:51:07,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:51:07,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:51:07,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:51:07,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:51:07" (1/1) ... [2021-05-02 18:51:07,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@272aadde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:51:07, skipping insertion in model container [2021-05-02 18:51:07,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:51:07" (1/1) ... [2021-05-02 18:51:07,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:51:07,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:51:07,804 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2021-05-02 18:51:07,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:51:07,821 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:51:07,836 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2021-05-02 18:51:07,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:51:07,853 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:51:07,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:51:07 WrapperNode [2021-05-02 18:51:07,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:51:07,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:51:07,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:51:07,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:51:07,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:51:07" (1/1) ... [2021-05-02 18:51:07,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:51:07" (1/1) ... [2021-05-02 18:51:07,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:51:07" (1/1) ... [2021-05-02 18:51:07,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:51:07" (1/1) ... [2021-05-02 18:51:07,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:51:07" (1/1) ... [2021-05-02 18:51:07,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:51:07" (1/1) ... [2021-05-02 18:51:07,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:51:07" (1/1) ... [2021-05-02 18:51:07,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:51:07,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:51:07,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:51:07,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:51:07,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:51:07" (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 18:51:07,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:51:07,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:51:07,956 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:51:07,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:51:07,957 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:51:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:51:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:51:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:51:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:51:07,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:51:07,958 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:51:07,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:51:07,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:51:07,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:51:07,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:51:07,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:51:07,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:51:08,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:51:08,167 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:51:08,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:51:08 BoogieIcfgContainer [2021-05-02 18:51:08,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:51:08,169 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:51:08,169 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:51:08,170 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:51:08,171 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:51:08" (1/1) ... [2021-05-02 18:51:08,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:51:08 BasicIcfg [2021-05-02 18:51:08,181 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:51:08,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:51:08,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:51:08,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:51:08,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:51:07" (1/4) ... [2021-05-02 18:51:08,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567bcba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:51:08, skipping insertion in model container [2021-05-02 18:51:08,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:51:07" (2/4) ... [2021-05-02 18:51:08,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567bcba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:51:08, skipping insertion in model container [2021-05-02 18:51:08,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:51:08" (3/4) ... [2021-05-02 18:51:08,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567bcba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:51:08, skipping insertion in model container [2021-05-02 18:51:08,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:51:08" (4/4) ... [2021-05-02 18:51:08,198 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.cJordan [2021-05-02 18:51:08,202 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:51:08,205 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:51:08,219 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:51:08,230 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:51:08,231 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:51:08,231 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:51:08,231 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:51:08,231 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:51:08,231 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:51:08,231 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:51:08,231 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:51:08,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 18:51:08,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 18:51:08,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:08,243 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:08,244 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:08,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:08,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1381876426, now seen corresponding path program 1 times [2021-05-02 18:51:08,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:08,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567167996] [2021-05-02 18:51:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:08,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:08,390 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 18:51:08,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:08,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567167996] [2021-05-02 18:51:08,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567167996] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:51:08,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:51:08,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:51:08,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796600585] [2021-05-02 18:51:08,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:51:08,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:08,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:51:08,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:51:08,408 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 18:51:08,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:08,459 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-02 18:51:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:51:08,460 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 18:51:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:08,466 INFO L225 Difference]: With dead ends: 22 [2021-05-02 18:51:08,466 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 18:51:08,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:51:08,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 18:51:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 18:51:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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 18:51:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-05-02 18:51:08,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-05-02 18:51:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:08,488 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-05-02 18:51:08,488 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 18:51:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-05-02 18:51:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 18:51:08,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:08,492 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:08,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:51:08,492 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:08,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1382799947, now seen corresponding path program 1 times [2021-05-02 18:51:08,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:08,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651769379] [2021-05-02 18:51:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:08,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:08,577 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 18:51:08,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:08,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651769379] [2021-05-02 18:51:08,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651769379] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:51:08,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:51:08,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:51:08,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420017473] [2021-05-02 18:51:08,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:51:08,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:08,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:51:08,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:51:08,583 INFO L87 Difference]: Start difference. First operand 15 states and 17 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 18:51:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:08,677 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-05-02 18:51:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:51:08,678 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 18:51:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:08,679 INFO L225 Difference]: With dead ends: 17 [2021-05-02 18:51:08,679 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 18:51:08,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:51:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 18:51:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 18:51:08,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 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 18:51:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 18:51:08,686 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 18:51:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:08,687 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 18:51:08,687 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 18:51:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 18:51:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 18:51:08,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:08,688 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:08,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:51:08,689 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:08,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:08,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1658763799, now seen corresponding path program 1 times [2021-05-02 18:51:08,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:08,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239124917] [2021-05-02 18:51:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:08,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:08,762 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 18:51:08,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:08,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239124917] [2021-05-02 18:51:08,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239124917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:08,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182089603] [2021-05-02 18:51:08,762 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 18:51:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:08,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 18:51:08,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:08,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:08,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:08,887 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 18:51:08,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182089603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:08,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:08,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 18:51:08,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084887442] [2021-05-02 18:51:08,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:51:08,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:08,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:51:08,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:51:08,891 INFO L87 Difference]: Start difference. First operand 17 states and 19 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 18:51:08,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:08,982 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-02 18:51:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 18:51:08,983 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 18:51:08,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:08,984 INFO L225 Difference]: With dead ends: 19 [2021-05-02 18:51:08,984 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 18:51:08,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:51:08,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 18:51:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 18:51:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 18:51:08,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 18:51:08,991 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2021-05-02 18:51:08,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:08,991 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 18:51:08,991 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 18:51:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 18:51:08,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 18:51:08,992 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:08,992 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:09,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:51:09,201 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:09,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:09,201 INFO L82 PathProgramCache]: Analyzing trace with hash 271204871, now seen corresponding path program 2 times [2021-05-02 18:51:09,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:09,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577658403] [2021-05-02 18:51:09,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:09,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:09,275 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 18:51:09,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:09,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577658403] [2021-05-02 18:51:09,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577658403] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:51:09,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:51:09,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:51:09,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396950348] [2021-05-02 18:51:09,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:51:09,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:09,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:51:09,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:51:09,277 INFO L87 Difference]: Start difference. First operand 19 states and 21 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 18:51:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:09,330 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-05-02 18:51:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:51:09,330 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 18:51:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:09,331 INFO L225 Difference]: With dead ends: 22 [2021-05-02 18:51:09,331 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 18:51:09,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:51:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 18:51:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 18:51:09,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 18:51:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-05-02 18:51:09,333 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2021-05-02 18:51:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:09,333 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-05-02 18:51:09,334 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 18:51:09,334 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-05-02 18:51:09,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 18:51:09,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:09,334 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:09,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 18:51:09,334 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:09,335 INFO L82 PathProgramCache]: Analyzing trace with hash 693672383, now seen corresponding path program 1 times [2021-05-02 18:51:09,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:09,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341812619] [2021-05-02 18:51:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:09,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 18:51:09,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:09,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341812619] [2021-05-02 18:51:09,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341812619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:51:09,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:51:09,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:51:09,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704375456] [2021-05-02 18:51:09,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:51:09,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:09,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:51:09,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:51:09,385 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 18:51:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:09,455 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-05-02 18:51:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:51:09,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 19 [2021-05-02 18:51:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:09,459 INFO L225 Difference]: With dead ends: 26 [2021-05-02 18:51:09,459 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 18:51:09,459 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:51:09,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 18:51:09,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-05-02 18:51:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 18:51:09,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 18:51:09,465 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2021-05-02 18:51:09,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:09,465 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 18:51:09,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 18:51:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 18:51:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 18:51:09,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:09,470 INFO L523 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:09,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 18:51:09,470 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:09,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:09,471 INFO L82 PathProgramCache]: Analyzing trace with hash 76189880, now seen corresponding path program 1 times [2021-05-02 18:51:09,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:09,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744177049] [2021-05-02 18:51:09,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:09,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 18:51:09,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:09,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744177049] [2021-05-02 18:51:09,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744177049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:09,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482235685] [2021-05-02 18:51:09,557 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 18:51:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:09,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 18:51:09,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:09,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:09,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:09,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:09,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 18:51:09,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482235685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:09,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:09,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 18:51:09,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073516482] [2021-05-02 18:51:09,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:51:09,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:09,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:51:09,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:51:09,688 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 18:51:09,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:09,780 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 18:51:09,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 18:51:09,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 23 [2021-05-02 18:51:09,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:09,781 INFO L225 Difference]: With dead ends: 26 [2021-05-02 18:51:09,781 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 18:51:09,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:51:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 18:51:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 18:51:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 18:51:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 18:51:09,787 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2021-05-02 18:51:09,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:09,787 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 18:51:09,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 18:51:09,787 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 18:51:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 18:51:09,788 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:09,788 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:10,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:10,001 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:10,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:10,002 INFO L82 PathProgramCache]: Analyzing trace with hash -531267754, now seen corresponding path program 2 times [2021-05-02 18:51:10,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:10,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395254864] [2021-05-02 18:51:10,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:10,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 18:51:10,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:10,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395254864] [2021-05-02 18:51:10,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395254864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:10,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233469888] [2021-05-02 18:51:10,067 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 18:51:10,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:51:10,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:10,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 18:51:10,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:10,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:10,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:10,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:10,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:10,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:10,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 18:51:10,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233469888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:10,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:10,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 18:51:10,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676708616] [2021-05-02 18:51:10,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:51:10,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:10,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:51:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:51:10,207 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 18:51:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:10,378 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 18:51:10,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:51:10,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 18:51:10,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:10,389 INFO L225 Difference]: With dead ends: 28 [2021-05-02 18:51:10,389 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 18:51:10,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:51:10,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 18:51:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 18:51:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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 18:51:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 18:51:10,391 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 25 [2021-05-02 18:51:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:10,391 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 18:51:10,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 18:51:10,392 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 18:51:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 18:51:10,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:10,392 INFO L523 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:10,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:10,593 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:10,593 INFO L82 PathProgramCache]: Analyzing trace with hash -182501772, now seen corresponding path program 3 times [2021-05-02 18:51:10,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:10,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454630199] [2021-05-02 18:51:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:10,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 18:51:10,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:10,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454630199] [2021-05-02 18:51:10,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454630199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:10,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062776654] [2021-05-02 18:51:10,645 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 18:51:10,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 18:51:10,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:10,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 18:51:10,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:10,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:10,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:10,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:10,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-05-02 18:51:10,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062776654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:10,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:10,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-05-02 18:51:10,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774414544] [2021-05-02 18:51:10,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 18:51:10,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:10,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 18:51:10,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:51:10,745 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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 18:51:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:10,965 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-05-02 18:51:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 18:51:10,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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 18:51:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:10,967 INFO L225 Difference]: With dead ends: 36 [2021-05-02 18:51:10,967 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 18:51:10,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-05-02 18:51:10,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 18:51:10,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-05-02 18:51:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 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 18:51:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-02 18:51:10,969 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 27 [2021-05-02 18:51:10,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:10,969 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-02 18:51:10,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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 18:51:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-02 18:51:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 18:51:10,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:10,970 INFO L523 BasicCegarLoop]: trace histogram [8, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:11,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:11,187 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:11,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:11,187 INFO L82 PathProgramCache]: Analyzing trace with hash 563037067, now seen corresponding path program 4 times [2021-05-02 18:51:11,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:11,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332356228] [2021-05-02 18:51:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:11,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 18:51:11,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:11,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332356228] [2021-05-02 18:51:11,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332356228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:11,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046759760] [2021-05-02 18:51:11,251 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 18:51:11,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:51:11,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:11,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 18:51:11,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:11,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 18:51:11,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046759760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:11,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:11,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 18:51:11,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074434076] [2021-05-02 18:51:11,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 18:51:11,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:11,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 18:51:11,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:51:11,370 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 18:51:11,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:11,563 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-02 18:51:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:51:11,563 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 33 [2021-05-02 18:51:11,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:11,564 INFO L225 Difference]: With dead ends: 36 [2021-05-02 18:51:11,564 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 18:51:11,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-02 18:51:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 18:51:11,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 18:51:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 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 18:51:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-05-02 18:51:11,566 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 33 [2021-05-02 18:51:11,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:11,566 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-05-02 18:51:11,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 18:51:11,566 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-05-02 18:51:11,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 18:51:11,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:11,567 INFO L523 BasicCegarLoop]: trace histogram [9, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:11,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:11,776 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:11,776 INFO L82 PathProgramCache]: Analyzing trace with hash -869333847, now seen corresponding path program 5 times [2021-05-02 18:51:11,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:11,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037905466] [2021-05-02 18:51:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:11,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 18:51:11,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:11,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037905466] [2021-05-02 18:51:11,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037905466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:11,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833675200] [2021-05-02 18:51:11,835 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 18:51:11,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 18:51:11,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:11,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 18:51:11,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:11,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 58 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 18:51:11,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833675200] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:11,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:11,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-05-02 18:51:11,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875063467] [2021-05-02 18:51:11,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 18:51:11,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:11,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 18:51:11,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 18:51:11,929 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 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 18:51:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:12,214 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-05-02 18:51:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 18:51:12,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 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 18:51:12,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:12,216 INFO L225 Difference]: With dead ends: 46 [2021-05-02 18:51:12,216 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 18:51:12,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-05-02 18:51:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 18:51:12,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 18:51:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 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 18:51:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-05-02 18:51:12,218 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 35 [2021-05-02 18:51:12,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:12,219 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-05-02 18:51:12,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 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 18:51:12,219 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-05-02 18:51:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 18:51:12,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:12,219 INFO L523 BasicCegarLoop]: trace histogram [12, 7, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:12,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:12,426 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:12,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:12,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1496716361, now seen corresponding path program 6 times [2021-05-02 18:51:12,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:12,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285672115] [2021-05-02 18:51:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:12,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 18:51:12,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:12,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285672115] [2021-05-02 18:51:12,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285672115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:12,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026638634] [2021-05-02 18:51:12,505 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 18:51:12,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-02 18:51:12,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:12,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 18:51:12,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:12,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:12,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:12,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:12,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:12,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:12,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 62 proven. 8 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-05-02 18:51:12,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026638634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:12,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:12,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2021-05-02 18:51:12,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130088846] [2021-05-02 18:51:12,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 18:51:12,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:12,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 18:51:12,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:51:12,660 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 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 18:51:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:12,989 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-05-02 18:51:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 18:51:12,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 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 18:51:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:12,990 INFO L225 Difference]: With dead ends: 54 [2021-05-02 18:51:12,990 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 18:51:12,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2021-05-02 18:51:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 18:51:12,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-05-02 18:51:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 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 18:51:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-05-02 18:51:12,993 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 45 [2021-05-02 18:51:12,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:12,993 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-05-02 18:51:12,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 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 18:51:12,993 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-05-02 18:51:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 18:51:12,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:12,994 INFO L523 BasicCegarLoop]: trace histogram [14, 8, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:13,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:13,197 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:13,197 INFO L82 PathProgramCache]: Analyzing trace with hash -176690226, now seen corresponding path program 7 times [2021-05-02 18:51:13,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:13,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334338578] [2021-05-02 18:51:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:13,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 18:51:13,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:13,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334338578] [2021-05-02 18:51:13,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334338578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:13,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625060315] [2021-05-02 18:51:13,268 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 18:51:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:13,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 18:51:13,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:13,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 18:51:13,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625060315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:13,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:13,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 18:51:13,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584598029] [2021-05-02 18:51:13,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 18:51:13,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:13,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 18:51:13,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 18:51:13,410 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 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 18:51:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:13,634 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-05-02 18:51:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 18:51:13,635 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 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 18:51:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:13,635 INFO L225 Difference]: With dead ends: 54 [2021-05-02 18:51:13,635 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 18:51:13,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-05-02 18:51:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 18:51:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 18:51:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 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 18:51:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-05-02 18:51:13,639 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 51 [2021-05-02 18:51:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:13,640 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-05-02 18:51:13,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 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 18:51:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-05-02 18:51:13,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 18:51:13,640 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:13,640 INFO L523 BasicCegarLoop]: trace histogram [15, 9, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:13,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 18:51:13,845 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:13,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1677779308, now seen corresponding path program 8 times [2021-05-02 18:51:13,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:13,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245039857] [2021-05-02 18:51:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:13,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 18:51:13,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:13,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245039857] [2021-05-02 18:51:13,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245039857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:13,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632829303] [2021-05-02 18:51:13,949 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 18:51:13,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:51:13,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:13,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 18:51:13,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:14,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 18:51:14,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632829303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:14,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:14,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 18:51:14,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714744912] [2021-05-02 18:51:14,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 18:51:14,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:14,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 18:51:14,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:51:14,071 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 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 18:51:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:14,349 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2021-05-02 18:51:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 18:51:14,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 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 18:51:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:14,350 INFO L225 Difference]: With dead ends: 56 [2021-05-02 18:51:14,350 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 18:51:14,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-05-02 18:51:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 18:51:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 18:51:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 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 18:51:14,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2021-05-02 18:51:14,353 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 53 [2021-05-02 18:51:14,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:14,353 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2021-05-02 18:51:14,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 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 18:51:14,353 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2021-05-02 18:51:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 18:51:14,354 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:14,354 INFO L523 BasicCegarLoop]: trace histogram [16, 10, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:14,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:14,561 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:14,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1411573642, now seen corresponding path program 9 times [2021-05-02 18:51:14,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:14,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337017275] [2021-05-02 18:51:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:14,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 121 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 18:51:14,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:14,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337017275] [2021-05-02 18:51:14,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337017275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:14,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999961033] [2021-05-02 18:51:14,673 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 18:51:14,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-02 18:51:14,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:14,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 18:51:14,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:14,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 108 proven. 18 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-05-02 18:51:14,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999961033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:14,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:14,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2021-05-02 18:51:14,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521733831] [2021-05-02 18:51:14,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 18:51:14,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:14,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 18:51:14,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:51:14,849 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 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 18:51:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:15,292 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-05-02 18:51:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 18:51:15,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 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 18:51:15,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:15,293 INFO L225 Difference]: With dead ends: 64 [2021-05-02 18:51:15,293 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 18:51:15,293 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 438.2ms TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 18:51:15,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 18:51:15,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-05-02 18:51:15,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 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 18:51:15,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-05-02 18:51:15,296 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 55 [2021-05-02 18:51:15,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:15,296 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-05-02 18:51:15,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 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 18:51:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-05-02 18:51:15,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 18:51:15,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:15,297 INFO L523 BasicCegarLoop]: trace histogram [18, 11, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:15,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:15,512 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1771272353, now seen corresponding path program 10 times [2021-05-02 18:51:15,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:15,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096102091] [2021-05-02 18:51:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:15,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-05-02 18:51:15,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:15,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096102091] [2021-05-02 18:51:15,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096102091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:15,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423941186] [2021-05-02 18:51:15,620 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 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 18:51:15,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:51:15,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:15,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 18:51:15,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:15,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-05-02 18:51:15,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423941186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:15,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:15,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 18:51:15,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886360508] [2021-05-02 18:51:15,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 18:51:15,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:15,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 18:51:15,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 18:51:15,776 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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 18:51:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:16,075 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2021-05-02 18:51:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 18:51:16,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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 18:51:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:16,076 INFO L225 Difference]: With dead ends: 64 [2021-05-02 18:51:16,076 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 18:51:16,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2021-05-02 18:51:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 18:51:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 18:51:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 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 18:51:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-05-02 18:51:16,079 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 61 [2021-05-02 18:51:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:16,079 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-05-02 18:51:16,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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 18:51:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-05-02 18:51:16,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 18:51:16,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:16,079 INFO L523 BasicCegarLoop]: trace histogram [19, 12, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:16,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 18:51:16,285 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:16,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:16,285 INFO L82 PathProgramCache]: Analyzing trace with hash 307527871, now seen corresponding path program 11 times [2021-05-02 18:51:16,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:16,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256263657] [2021-05-02 18:51:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:16,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 169 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-05-02 18:51:16,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:16,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256263657] [2021-05-02 18:51:16,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256263657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:16,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111182598] [2021-05-02 18:51:16,411 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 18:51:16,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-02 18:51:16,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:16,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 18:51:16,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:16,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:16,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:16,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:16,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:16,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:16,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:16,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:16,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:16,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:16,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:16,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:16,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 256 proven. 39 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-05-02 18:51:16,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111182598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:16,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:16,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2021-05-02 18:51:16,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640133764] [2021-05-02 18:51:16,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 18:51:16,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 18:51:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 18:51:16,606 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 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 18:51:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:17,141 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2021-05-02 18:51:17,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 18:51:17,142 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 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 18:51:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:17,142 INFO L225 Difference]: With dead ends: 78 [2021-05-02 18:51:17,142 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 18:51:17,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 587.6ms TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 18:51:17,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 18:51:17,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 18:51:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 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 18:51:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2021-05-02 18:51:17,145 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 63 [2021-05-02 18:51:17,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:17,146 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2021-05-02 18:51:17,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 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 18:51:17,146 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2021-05-02 18:51:17,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 18:51:17,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:17,146 INFO L523 BasicCegarLoop]: trace histogram [23, 13, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:17,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 18:51:17,361 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:17,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1679179387, now seen corresponding path program 12 times [2021-05-02 18:51:17,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:17,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998221052] [2021-05-02 18:51:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:17,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-05-02 18:51:17,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:17,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998221052] [2021-05-02 18:51:17,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998221052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:17,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204285460] [2021-05-02 18:51:17,486 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 18:51:17,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 18:51:17,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 18:51:17,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:17,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:17,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:17,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:17,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:17,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:17,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:17,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:17,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:17,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:17,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 220 proven. 32 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-05-02 18:51:17,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204285460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:17,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:17,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2021-05-02 18:51:17,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995924861] [2021-05-02 18:51:17,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 18:51:17,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:17,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 18:51:17,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 18:51:17,717 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 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 18:51:18,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:18,311 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-05-02 18:51:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 18:51:18,311 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 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 18:51:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:18,313 INFO L225 Difference]: With dead ends: 86 [2021-05-02 18:51:18,313 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 18:51:18,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 602.0ms TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 18:51:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 18:51:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-05-02 18:51:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 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 18:51:18,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2021-05-02 18:51:18,324 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 77 [2021-05-02 18:51:18,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:18,325 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2021-05-02 18:51:18,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 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 18:51:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2021-05-02 18:51:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 18:51:18,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:18,327 INFO L523 BasicCegarLoop]: trace histogram [25, 14, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:18,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 18:51:18,545 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash -152030564, now seen corresponding path program 13 times [2021-05-02 18:51:18,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:18,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224009306] [2021-05-02 18:51:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:18,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 315 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-02 18:51:18,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:18,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224009306] [2021-05-02 18:51:18,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224009306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:18,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766433319] [2021-05-02 18:51:18,705 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 18:51:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:18,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 18:51:18,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:18,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 315 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-02 18:51:18,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766433319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:18,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:18,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 18:51:18,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006028595] [2021-05-02 18:51:18,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 18:51:18,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:18,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 18:51:18,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 18:51:18,880 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 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 18:51:19,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:19,277 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2021-05-02 18:51:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 18:51:19,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 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 18:51:19,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:19,278 INFO L225 Difference]: With dead ends: 86 [2021-05-02 18:51:19,278 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 18:51:19,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=426, Invalid=696, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 18:51:19,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 18:51:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 18:51:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 81 states have internal predecessors, (98), 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 18:51:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2021-05-02 18:51:19,280 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 83 [2021-05-02 18:51:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:19,280 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2021-05-02 18:51:19,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 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 18:51:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2021-05-02 18:51:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 18:51:19,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:19,281 INFO L523 BasicCegarLoop]: trace histogram [26, 15, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:19,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:19,489 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:19,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1737175098, now seen corresponding path program 14 times [2021-05-02 18:51:19,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:19,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304949741] [2021-05-02 18:51:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:19,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-02 18:51:19,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:19,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304949741] [2021-05-02 18:51:19,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304949741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:19,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728667692] [2021-05-02 18:51:19,627 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 18:51:19,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:51:19,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:19,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 18:51:19,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:19,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-02 18:51:19,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728667692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:19,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:19,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 18:51:19,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058317035] [2021-05-02 18:51:19,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 18:51:19,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:19,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 18:51:19,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 18:51:19,842 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 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 18:51:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:20,256 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-05-02 18:51:20,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 18:51:20,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 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 18:51:20,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:20,257 INFO L225 Difference]: With dead ends: 88 [2021-05-02 18:51:20,257 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 18:51:20,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 467.5ms TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 18:51:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 18:51:20,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-02 18:51:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 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 18:51:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2021-05-02 18:51:20,260 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 85 [2021-05-02 18:51:20,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:20,260 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2021-05-02 18:51:20,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 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 18:51:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2021-05-02 18:51:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 18:51:20,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:20,260 INFO L523 BasicCegarLoop]: trace histogram [27, 16, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:20,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:20,465 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:20,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:20,465 INFO L82 PathProgramCache]: Analyzing trace with hash 492650072, now seen corresponding path program 15 times [2021-05-02 18:51:20,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:20,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327331838] [2021-05-02 18:51:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:20,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-02 18:51:20,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:20,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327331838] [2021-05-02 18:51:20,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327331838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:20,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103840311] [2021-05-02 18:51:20,621 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 18:51:20,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-02 18:51:20,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:20,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 18:51:20,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:20,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:20,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:20,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:20,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:20,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:20,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:20,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:20,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:20,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:20,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:20,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:20,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 302 proven. 50 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2021-05-02 18:51:20,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103840311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:20,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:20,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-05-02 18:51:20,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097575311] [2021-05-02 18:51:20,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 18:51:20,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:20,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 18:51:20,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 18:51:20,860 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 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 18:51:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:21,574 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2021-05-02 18:51:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 18:51:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 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 18:51:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:21,575 INFO L225 Difference]: With dead ends: 96 [2021-05-02 18:51:21,575 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 18:51:21,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 797.0ms TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 18:51:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 18:51:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-05-02 18:51:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.2134831460674158) internal successors, (108), 89 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 18:51:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2021-05-02 18:51:21,578 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 87 [2021-05-02 18:51:21,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:21,578 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2021-05-02 18:51:21,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 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 18:51:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2021-05-02 18:51:21,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 18:51:21,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:21,578 INFO L523 BasicCegarLoop]: trace histogram [29, 17, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:21,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:21,789 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:21,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1064058769, now seen corresponding path program 16 times [2021-05-02 18:51:21,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:21,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876094172] [2021-05-02 18:51:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:21,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 414 proven. 306 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 18:51:21,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:21,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876094172] [2021-05-02 18:51:21,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876094172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:21,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412016897] [2021-05-02 18:51:21,957 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 18:51:22,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:51:22,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:22,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 18:51:22,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:22,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 414 proven. 306 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 18:51:22,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412016897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:22,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:22,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 18:51:22,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395591753] [2021-05-02 18:51:22,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 18:51:22,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:22,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 18:51:22,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 18:51:22,142 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 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 18:51:22,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:22,696 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2021-05-02 18:51:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 18:51:22,697 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 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 18:51:22,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:22,698 INFO L225 Difference]: With dead ends: 96 [2021-05-02 18:51:22,698 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 18:51:22,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 575.3ms TimeCoverageRelationStatistics Valid=591, Invalid=969, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 18:51:22,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 18:51:22,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-02 18:51:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 91 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 18:51:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2021-05-02 18:51:22,700 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 93 [2021-05-02 18:51:22,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:22,700 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2021-05-02 18:51:22,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 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 18:51:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2021-05-02 18:51:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 18:51:22,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:22,701 INFO L523 BasicCegarLoop]: trace histogram [30, 18, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:22,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 18:51:22,917 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:22,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:22,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1568878451, now seen corresponding path program 17 times [2021-05-02 18:51:22,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:22,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522520214] [2021-05-02 18:51:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:23,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 437 proven. 342 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 18:51:23,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:23,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522520214] [2021-05-02 18:51:23,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522520214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:23,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795620316] [2021-05-02 18:51:23,112 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 18:51:23,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-05-02 18:51:23,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:23,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 18:51:23,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:23,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 646 proven. 126 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-05-02 18:51:23,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795620316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:23,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:23,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 32 [2021-05-02 18:51:23,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024204715] [2021-05-02 18:51:23,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 18:51:23,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:23,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 18:51:23,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 18:51:23,487 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 31 states have internal predecessors, (88), 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 18:51:24,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:24,459 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2021-05-02 18:51:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 18:51:24,460 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 31 states have internal predecessors, (88), 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 18:51:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:24,460 INFO L225 Difference]: With dead ends: 114 [2021-05-02 18:51:24,460 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 18:51:24,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1137.4ms TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 18:51:24,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 18:51:24,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-05-02 18:51:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 109 states have internal predecessors, (132), 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 18:51:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2021-05-02 18:51:24,463 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 95 [2021-05-02 18:51:24,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:24,463 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2021-05-02 18:51:24,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 31 states have internal predecessors, (88), 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 18:51:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2021-05-02 18:51:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 18:51:24,464 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:24,464 INFO L523 BasicCegarLoop]: trace histogram [35, 19, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:24,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 18:51:24,677 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:24,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:24,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1464464373, now seen corresponding path program 18 times [2021-05-02 18:51:24,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:24,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850221971] [2021-05-02 18:51:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:24,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1465 backedges. 620 proven. 380 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-05-02 18:51:24,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:24,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850221971] [2021-05-02 18:51:24,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850221971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:24,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86041349] [2021-05-02 18:51:24,889 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 18:51:24,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-05-02 18:51:24,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:24,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 18:51:24,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:25,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1465 backedges. 500 proven. 72 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2021-05-02 18:51:25,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86041349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:25,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:25,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 30 [2021-05-02 18:51:25,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331069074] [2021-05-02 18:51:25,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 18:51:25,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:25,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 18:51:25,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 18:51:25,234 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 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 18:51:26,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:26,134 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2021-05-02 18:51:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 18:51:26,135 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 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 113 [2021-05-02 18:51:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:26,135 INFO L225 Difference]: With dead ends: 122 [2021-05-02 18:51:26,135 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 18:51:26,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1011.4ms TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 18:51:26,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 18:51:26,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2021-05-02 18:51:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.2173913043478262) internal successors, (140), 115 states have internal predecessors, (140), 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 18:51:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 144 transitions. [2021-05-02 18:51:26,138 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 144 transitions. Word has length 113 [2021-05-02 18:51:26,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:26,138 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 144 transitions. [2021-05-02 18:51:26,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 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 18:51:26,138 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2021-05-02 18:51:26,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-02 18:51:26,139 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:26,139 INFO L523 BasicCegarLoop]: trace histogram [37, 20, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:26,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 18:51:26,357 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:26,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1366299426, now seen corresponding path program 19 times [2021-05-02 18:51:26,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:26,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025934238] [2021-05-02 18:51:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:26,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-02 18:51:26,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:26,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025934238] [2021-05-02 18:51:26,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025934238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:26,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891602842] [2021-05-02 18:51:26,573 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 18:51:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:26,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 18:51:26,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:26,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-02 18:51:26,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891602842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:26,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:26,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 18:51:26,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803298060] [2021-05-02 18:51:26,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 18:51:26,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:26,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 18:51:26,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 18:51:26,780 INFO L87 Difference]: Start difference. First operand 120 states and 144 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 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 18:51:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:27,408 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2021-05-02 18:51:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 18:51:27,409 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 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 18:51:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:27,409 INFO L225 Difference]: With dead ends: 122 [2021-05-02 18:51:27,409 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 18:51:27,410 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 702.9ms TimeCoverageRelationStatistics Valid=783, Invalid=1287, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 18:51:27,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 18:51:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-05-02 18:51:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.2136752136752136) internal successors, (142), 117 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 18:51:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2021-05-02 18:51:27,412 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 119 [2021-05-02 18:51:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:27,412 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2021-05-02 18:51:27,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 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 18:51:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2021-05-02 18:51:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-02 18:51:27,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:27,413 INFO L523 BasicCegarLoop]: trace histogram [38, 21, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:27,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 18:51:27,617 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:27,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:27,618 INFO L82 PathProgramCache]: Analyzing trace with hash -89843264, now seen corresponding path program 20 times [2021-05-02 18:51:27,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:27,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828163405] [2021-05-02 18:51:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:27,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 726 proven. 462 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-02 18:51:27,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:27,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828163405] [2021-05-02 18:51:27,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828163405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:27,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574482600] [2021-05-02 18:51:27,849 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 18:51:27,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:51:27,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:27,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 18:51:27,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:27,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:27,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:28,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:28,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 726 proven. 462 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-02 18:51:28,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574482600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:28,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:28,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 18:51:28,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967575019] [2021-05-02 18:51:28,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 18:51:28,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:28,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 18:51:28,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 18:51:28,057 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 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 18:51:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:28,678 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2021-05-02 18:51:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 18:51:28,679 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 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 121 [2021-05-02 18:51:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:28,679 INFO L225 Difference]: With dead ends: 124 [2021-05-02 18:51:28,679 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 18:51:28,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 704.5ms TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 18:51:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 18:51:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-05-02 18:51:28,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 119 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 18:51:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2021-05-02 18:51:28,683 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 121 [2021-05-02 18:51:28,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:28,683 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2021-05-02 18:51:28,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 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 18:51:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2021-05-02 18:51:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 18:51:28,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:28,683 INFO L523 BasicCegarLoop]: trace histogram [39, 22, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:28,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 18:51:28,897 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:28,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:28,897 INFO L82 PathProgramCache]: Analyzing trace with hash 716370142, now seen corresponding path program 21 times [2021-05-02 18:51:28,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:28,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511679175] [2021-05-02 18:51:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:29,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1793 backedges. 759 proven. 506 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-02 18:51:29,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:29,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511679175] [2021-05-02 18:51:29,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511679175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:29,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129265357] [2021-05-02 18:51:29,149 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 18:51:29,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 18:51:29,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:29,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 18:51:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:29,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1793 backedges. 622 proven. 98 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2021-05-02 18:51:29,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129265357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:29,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:29,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2021-05-02 18:51:29,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338522828] [2021-05-02 18:51:29,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 18:51:29,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:29,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 18:51:29,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 18:51:29,501 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 33 states have internal predecessors, (96), 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 18:51:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:30,506 INFO L93 Difference]: Finished difference Result 132 states and 160 transitions. [2021-05-02 18:51:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 18:51:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 33 states have internal predecessors, (96), 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 18:51:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:30,507 INFO L225 Difference]: With dead ends: 132 [2021-05-02 18:51:30,507 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 18:51:30,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1221.9ms TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 18:51:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 18:51:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2021-05-02 18:51:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.216) internal successors, (152), 125 states have internal predecessors, (152), 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 18:51:30,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 156 transitions. [2021-05-02 18:51:30,510 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 156 transitions. Word has length 123 [2021-05-02 18:51:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:30,510 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 156 transitions. [2021-05-02 18:51:30,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 33 states have internal predecessors, (96), 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 18:51:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 156 transitions. [2021-05-02 18:51:30,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 18:51:30,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:30,511 INFO L523 BasicCegarLoop]: trace histogram [41, 23, 18, 18, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:30,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:30,723 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:30,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1436666101, now seen corresponding path program 22 times [2021-05-02 18:51:30,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:30,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943464345] [2021-05-02 18:51:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:30,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1987 backedges. 840 proven. 552 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 18:51:30,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:30,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943464345] [2021-05-02 18:51:30,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943464345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:30,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759957902] [2021-05-02 18:51:30,994 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 18:51:31,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:51:31,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:31,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 18:51:31,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:31,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1987 backedges. 840 proven. 552 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 18:51:31,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759957902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:31,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:31,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 18:51:31,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313047070] [2021-05-02 18:51:31,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 18:51:31,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:31,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 18:51:31,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 18:51:31,216 INFO L87 Difference]: Start difference. First operand 130 states and 156 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 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 18:51:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:31,929 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2021-05-02 18:51:31,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 18:51:31,929 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 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 129 [2021-05-02 18:51:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:31,930 INFO L225 Difference]: With dead ends: 132 [2021-05-02 18:51:31,930 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 18:51:31,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 805.7ms TimeCoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 18:51:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 18:51:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-05-02 18:51:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.2125984251968505) internal successors, (154), 127 states have internal predecessors, (154), 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 18:51:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 158 transitions. [2021-05-02 18:51:31,932 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 158 transitions. Word has length 129 [2021-05-02 18:51:31,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:31,932 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 158 transitions. [2021-05-02 18:51:31,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 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 18:51:31,932 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 158 transitions. [2021-05-02 18:51:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 18:51:31,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:31,933 INFO L523 BasicCegarLoop]: trace histogram [42, 24, 18, 18, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:32,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 18:51:32,145 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:32,145 INFO L82 PathProgramCache]: Analyzing trace with hash 32350739, now seen corresponding path program 23 times [2021-05-02 18:51:32,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:32,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348641209] [2021-05-02 18:51:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:32,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 875 proven. 600 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 18:51:32,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:32,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348641209] [2021-05-02 18:51:32,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348641209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:32,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916192172] [2021-05-02 18:51:32,442 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 18:51:32,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-05-02 18:51:32,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:32,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 18:51:32,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:32,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 1254 proven. 256 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2021-05-02 18:51:32,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916192172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:32,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:32,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 15] total 41 [2021-05-02 18:51:32,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156470452] [2021-05-02 18:51:32,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 18:51:32,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:32,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 18:51:32,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 18:51:32,941 INFO L87 Difference]: Start difference. First operand 132 states and 158 transitions. Second operand has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 states have internal predecessors, (114), 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 18:51:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:34,313 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2021-05-02 18:51:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 18:51:34,314 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 states have internal predecessors, (114), 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 18:51:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:34,314 INFO L225 Difference]: With dead ends: 146 [2021-05-02 18:51:34,314 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 18:51:34,315 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1720.7ms TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 18:51:34,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 18:51:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-02 18:51:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2127659574468086) internal successors, (171), 141 states have internal predecessors, (171), 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 18:51:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2021-05-02 18:51:34,317 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 131 [2021-05-02 18:51:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:34,318 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2021-05-02 18:51:34,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 states have internal predecessors, (114), 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 18:51:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2021-05-02 18:51:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-02 18:51:34,318 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:34,318 INFO L523 BasicCegarLoop]: trace histogram [46, 25, 21, 21, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:34,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:34,525 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:34,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:34,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1253082151, now seen corresponding path program 24 times [2021-05-02 18:51:34,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:34,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323777925] [2021-05-02 18:51:34,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:34,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 1066 proven. 650 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2021-05-02 18:51:34,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:34,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323777925] [2021-05-02 18:51:34,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323777925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:34,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956277901] [2021-05-02 18:51:34,818 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 18:51:34,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-05-02 18:51:34,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:34,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 18:51:34,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:35,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 858 proven. 128 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2021-05-02 18:51:35,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956277901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:35,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:35,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2021-05-02 18:51:35,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691837669] [2021-05-02 18:51:35,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 18:51:35,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:35,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 18:51:35,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 18:51:35,290 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 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 18:51:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:36,532 INFO L93 Difference]: Finished difference Result 154 states and 187 transitions. [2021-05-02 18:51:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 18:51:36,532 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 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 145 [2021-05-02 18:51:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:36,533 INFO L225 Difference]: With dead ends: 154 [2021-05-02 18:51:36,533 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 18:51:36,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1463.7ms TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 18:51:36,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 18:51:36,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-05-02 18:51:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.217687074829932) internal successors, (179), 147 states have internal predecessors, (179), 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 18:51:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 183 transitions. [2021-05-02 18:51:36,536 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 183 transitions. Word has length 145 [2021-05-02 18:51:36,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:36,536 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 183 transitions. [2021-05-02 18:51:36,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 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 18:51:36,536 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 183 transitions. [2021-05-02 18:51:36,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 18:51:36,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:36,537 INFO L523 BasicCegarLoop]: trace histogram [48, 26, 22, 22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:36,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 18:51:36,752 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:36,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:36,752 INFO L82 PathProgramCache]: Analyzing trace with hash -763300880, now seen corresponding path program 25 times [2021-05-02 18:51:36,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:36,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525617455] [2021-05-02 18:51:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:37,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2766 backedges. 1161 proven. 702 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-02 18:51:37,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:37,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525617455] [2021-05-02 18:51:37,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525617455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:37,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630701947] [2021-05-02 18:51:37,045 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 18:51:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:37,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 18:51:37,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:37,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2766 backedges. 1161 proven. 702 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-02 18:51:37,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630701947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:37,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:37,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 18:51:37,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39655286] [2021-05-02 18:51:37,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 18:51:37,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:37,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 18:51:37,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 18:51:37,276 INFO L87 Difference]: Start difference. First operand 152 states and 183 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 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 18:51:38,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:38,141 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2021-05-02 18:51:38,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 18:51:38,141 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 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 151 [2021-05-02 18:51:38,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:38,142 INFO L225 Difference]: With dead ends: 154 [2021-05-02 18:51:38,142 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 18:51:38,142 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 953.5ms TimeCoverageRelationStatistics Valid=1248, Invalid=2058, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 18:51:38,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 18:51:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-05-02 18:51:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.2147651006711409) internal successors, (181), 149 states have internal predecessors, (181), 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 18:51:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-05-02 18:51:38,144 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 151 [2021-05-02 18:51:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:38,145 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-05-02 18:51:38,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 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 18:51:38,145 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-05-02 18:51:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-02 18:51:38,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:38,145 INFO L523 BasicCegarLoop]: trace histogram [49, 27, 22, 22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:38,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:38,353 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:38,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:38,353 INFO L82 PathProgramCache]: Analyzing trace with hash 558105230, now seen corresponding path program 26 times [2021-05-02 18:51:38,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:38,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674223079] [2021-05-02 18:51:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:38,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2863 backedges. 1204 proven. 756 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-02 18:51:38,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:38,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674223079] [2021-05-02 18:51:38,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674223079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:38,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281076122] [2021-05-02 18:51:38,706 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 18:51:38,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:51:38,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:38,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 18:51:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:38,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2863 backedges. 1204 proven. 756 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-02 18:51:38,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281076122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:38,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:38,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-02 18:51:38,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307711595] [2021-05-02 18:51:38,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 18:51:38,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:38,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 18:51:38,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 18:51:38,958 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 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 18:51:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:39,823 INFO L93 Difference]: Finished difference Result 156 states and 187 transitions. [2021-05-02 18:51:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 18:51:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 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 153 [2021-05-02 18:51:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:39,824 INFO L225 Difference]: With dead ends: 156 [2021-05-02 18:51:39,824 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 18:51:39,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1062.0ms TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 18:51:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 18:51:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-05-02 18:51:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.2119205298013245) internal successors, (183), 151 states have internal predecessors, (183), 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 18:51:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 187 transitions. [2021-05-02 18:51:39,827 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 187 transitions. Word has length 153 [2021-05-02 18:51:39,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:39,827 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 187 transitions. [2021-05-02 18:51:39,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 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 18:51:39,827 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 187 transitions. [2021-05-02 18:51:39,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 18:51:39,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:39,828 INFO L523 BasicCegarLoop]: trace histogram [50, 28, 22, 22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:40,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-02 18:51:40,041 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:40,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:40,041 INFO L82 PathProgramCache]: Analyzing trace with hash -880942676, now seen corresponding path program 27 times [2021-05-02 18:51:40,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:40,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078563535] [2021-05-02 18:51:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:40,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2962 backedges. 1247 proven. 812 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-02 18:51:40,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:40,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078563535] [2021-05-02 18:51:40,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078563535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:40,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732890392] [2021-05-02 18:51:40,423 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 18:51:40,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-05-02 18:51:40,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:40,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 18:51:40,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:40,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2962 backedges. 1016 proven. 162 refuted. 0 times theorem prover too weak. 1784 trivial. 0 not checked. [2021-05-02 18:51:40,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732890392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:40,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:40,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2021-05-02 18:51:40,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363193040] [2021-05-02 18:51:40,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 18:51:40,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:40,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 18:51:40,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 18:51:40,881 INFO L87 Difference]: Start difference. First operand 156 states and 187 transitions. Second operand has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 41 states have internal predecessors, (116), 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 18:51:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:42,333 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2021-05-02 18:51:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 18:51:42,334 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 41 states have internal predecessors, (116), 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 155 [2021-05-02 18:51:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:42,334 INFO L225 Difference]: With dead ends: 164 [2021-05-02 18:51:42,334 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 18:51:42,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1790.8ms TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 18:51:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 18:51:42,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2021-05-02 18:51:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.21656050955414) internal successors, (191), 157 states have internal predecessors, (191), 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 18:51:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 195 transitions. [2021-05-02 18:51:42,337 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 195 transitions. Word has length 155 [2021-05-02 18:51:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:42,337 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 195 transitions. [2021-05-02 18:51:42,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 41 states have internal predecessors, (116), 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 18:51:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 195 transitions. [2021-05-02 18:51:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 18:51:42,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:42,338 INFO L523 BasicCegarLoop]: trace histogram [52, 29, 23, 23, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:42,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:42,553 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:42,553 INFO L82 PathProgramCache]: Analyzing trace with hash 500280003, now seen corresponding path program 28 times [2021-05-02 18:51:42,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:42,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098567525] [2021-05-02 18:51:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:42,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 1350 proven. 870 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-05-02 18:51:42,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:42,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098567525] [2021-05-02 18:51:42,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098567525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:42,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542392721] [2021-05-02 18:51:42,936 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 18:51:42,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:51:42,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 18:51:43,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:43,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 1350 proven. 870 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-05-02 18:51:43,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542392721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:43,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:43,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 18:51:43,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078105533] [2021-05-02 18:51:43,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 18:51:43,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 18:51:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 18:51:43,184 INFO L87 Difference]: Start difference. First operand 162 states and 195 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 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 18:51:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:44,195 INFO L93 Difference]: Finished difference Result 164 states and 197 transitions. [2021-05-02 18:51:44,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 18:51:44,195 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 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 161 [2021-05-02 18:51:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:44,196 INFO L225 Difference]: With dead ends: 164 [2021-05-02 18:51:44,196 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 18:51:44,196 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1184.9ms TimeCoverageRelationStatistics Valid=1521, Invalid=2511, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 18:51:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 18:51:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-02 18:51:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.2138364779874213) internal successors, (193), 159 states have internal predecessors, (193), 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 18:51:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 197 transitions. [2021-05-02 18:51:44,198 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 197 transitions. Word has length 161 [2021-05-02 18:51:44,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:44,199 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 197 transitions. [2021-05-02 18:51:44,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 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 18:51:44,199 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 197 transitions. [2021-05-02 18:51:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-02 18:51:44,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:44,199 INFO L523 BasicCegarLoop]: trace histogram [53, 30, 23, 23, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:44,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 18:51:44,415 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:44,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:44,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2076281825, now seen corresponding path program 29 times [2021-05-02 18:51:44,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:44,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716995295] [2021-05-02 18:51:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:44,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3315 backedges. 1395 proven. 930 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-05-02 18:51:44,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:44,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716995295] [2021-05-02 18:51:44,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716995295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:44,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135448034] [2021-05-02 18:51:44,807 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 18:51:44,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-05-02 18:51:44,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:44,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 18:51:44,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:44,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:44,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:44,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:44,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:44,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:44,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3315 backedges. 2010 proven. 441 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2021-05-02 18:51:45,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135448034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:45,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:45,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19] total 51 [2021-05-02 18:51:45,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156007581] [2021-05-02 18:51:45,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 18:51:45,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:45,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 18:51:45,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 18:51:45,527 INFO L87 Difference]: Start difference. First operand 164 states and 197 transitions. Second operand has 51 states, 51 states have (on average 2.7450980392156863) internal successors, (140), 50 states have internal predecessors, (140), 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 18:51:47,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:47,561 INFO L93 Difference]: Finished difference Result 182 states and 219 transitions. [2021-05-02 18:51:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 18:51:47,561 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.7450980392156863) internal successors, (140), 50 states have internal predecessors, (140), 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 163 [2021-05-02 18:51:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:47,562 INFO L225 Difference]: With dead ends: 182 [2021-05-02 18:51:47,562 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 18:51:47,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 2593.8ms TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 18:51:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 18:51:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-02 18:51:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2146892655367232) internal successors, (215), 177 states have internal predecessors, (215), 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 18:51:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 219 transitions. [2021-05-02 18:51:47,565 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 219 transitions. Word has length 163 [2021-05-02 18:51:47,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:47,565 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 219 transitions. [2021-05-02 18:51:47,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.7450980392156863) internal successors, (140), 50 states have internal predecessors, (140), 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 18:51:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 219 transitions. [2021-05-02 18:51:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-05-02 18:51:47,566 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:47,566 INFO L523 BasicCegarLoop]: trace histogram [58, 31, 27, 27, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:47,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:47,777 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:47,777 INFO L82 PathProgramCache]: Analyzing trace with hash 506116191, now seen corresponding path program 30 times [2021-05-02 18:51:47,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:47,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303551027] [2021-05-02 18:51:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:48,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4066 backedges. 1696 proven. 992 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-05-02 18:51:48,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:48,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303551027] [2021-05-02 18:51:48,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303551027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:48,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052471615] [2021-05-02 18:51:48,238 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 18:51:48,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-02 18:51:48,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:48,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 18:51:48,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:48,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4066 backedges. 1354 proven. 200 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2021-05-02 18:51:48,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052471615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:48,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:48,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 13] total 46 [2021-05-02 18:51:48,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612686030] [2021-05-02 18:51:48,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 18:51:48,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:48,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 18:51:48,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 18:51:48,869 INFO L87 Difference]: Start difference. First operand 182 states and 219 transitions. Second operand has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 45 states have internal predecessors, (126), 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 18:51:50,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:50,543 INFO L93 Difference]: Finished difference Result 190 states and 231 transitions. [2021-05-02 18:51:50,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 18:51:50,543 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 45 states have internal predecessors, (126), 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 181 [2021-05-02 18:51:50,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:50,544 INFO L225 Difference]: With dead ends: 190 [2021-05-02 18:51:50,544 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 18:51:50,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2174.1ms TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 18:51:50,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 18:51:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2021-05-02 18:51:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.2185792349726776) internal successors, (223), 183 states have internal predecessors, (223), 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 18:51:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 227 transitions. [2021-05-02 18:51:50,547 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 227 transitions. Word has length 181 [2021-05-02 18:51:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:50,547 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 227 transitions. [2021-05-02 18:51:50,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 45 states have internal predecessors, (126), 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 18:51:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 227 transitions. [2021-05-02 18:51:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-05-02 18:51:50,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:50,548 INFO L523 BasicCegarLoop]: trace histogram [60, 32, 28, 28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:50,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 18:51:50,763 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:50,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:50,764 INFO L82 PathProgramCache]: Analyzing trace with hash 573720182, now seen corresponding path program 31 times [2021-05-02 18:51:50,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:50,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895825120] [2021-05-02 18:51:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:51,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1815 proven. 1056 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-02 18:51:51,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:51,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895825120] [2021-05-02 18:51:51,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895825120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:51,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170237282] [2021-05-02 18:51:51,229 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 18:51:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:51,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 18:51:51,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:51,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1815 proven. 1056 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-02 18:51:51,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170237282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:51,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:51,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 18:51:51,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664575632] [2021-05-02 18:51:51,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 18:51:51,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:51,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 18:51:51,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 18:51:51,534 INFO L87 Difference]: Start difference. First operand 188 states and 227 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 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 18:51:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:52,681 INFO L93 Difference]: Finished difference Result 190 states and 229 transitions. [2021-05-02 18:51:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 18:51:52,681 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 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 187 [2021-05-02 18:51:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:52,682 INFO L225 Difference]: With dead ends: 190 [2021-05-02 18:51:52,682 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 18:51:52,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1370.0ms TimeCoverageRelationStatistics Valid=1821, Invalid=3009, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 18:51:52,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 18:51:52,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-05-02 18:51:52,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.2162162162162162) internal successors, (225), 185 states have internal predecessors, (225), 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 18:51:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 229 transitions. [2021-05-02 18:51:52,685 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 229 transitions. Word has length 187 [2021-05-02 18:51:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:52,685 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 229 transitions. [2021-05-02 18:51:52,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 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 18:51:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 229 transitions. [2021-05-02 18:51:52,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-05-02 18:51:52,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:52,686 INFO L523 BasicCegarLoop]: trace histogram [61, 33, 28, 28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:52,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 18:51:52,901 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash -627384812, now seen corresponding path program 32 times [2021-05-02 18:51:52,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:52,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844361984] [2021-05-02 18:51:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:53,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4477 backedges. 1870 proven. 1122 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-02 18:51:53,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:53,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844361984] [2021-05-02 18:51:53,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844361984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:53,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968373371] [2021-05-02 18:51:53,381 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 18:51:53,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:51:53,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:53,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 18:51:53,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:53,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4477 backedges. 1870 proven. 1122 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-02 18:51:53,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968373371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:53,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:53,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-02 18:51:53,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583719405] [2021-05-02 18:51:53,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 18:51:53,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:53,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 18:51:53,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 18:51:53,670 INFO L87 Difference]: Start difference. First operand 190 states and 229 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 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 18:51:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:54,852 INFO L93 Difference]: Finished difference Result 192 states and 231 transitions. [2021-05-02 18:51:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 18:51:54,852 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 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 189 [2021-05-02 18:51:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:54,853 INFO L225 Difference]: With dead ends: 192 [2021-05-02 18:51:54,853 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 18:51:54,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1421.5ms TimeCoverageRelationStatistics Valid=1927, Invalid=3185, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 18:51:54,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 18:51:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-05-02 18:51:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.213903743315508) internal successors, (227), 187 states have internal predecessors, (227), 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 18:51:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 231 transitions. [2021-05-02 18:51:54,856 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 231 transitions. Word has length 189 [2021-05-02 18:51:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:54,856 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 231 transitions. [2021-05-02 18:51:54,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 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 18:51:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 231 transitions. [2021-05-02 18:51:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-02 18:51:54,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:54,857 INFO L523 BasicCegarLoop]: trace histogram [62, 34, 28, 28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:55,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 18:51:55,072 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash 456918578, now seen corresponding path program 33 times [2021-05-02 18:51:55,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:55,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478800550] [2021-05-02 18:51:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:55,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4600 backedges. 1925 proven. 1190 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-02 18:51:55,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:55,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478800550] [2021-05-02 18:51:55,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478800550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:55,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337295919] [2021-05-02 18:51:55,615 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 18:51:55,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-05-02 18:51:55,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:55,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 18:51:55,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:55,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:55,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:55,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:55,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:55,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:55,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:55,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:55,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:55,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:55,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:55,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:55,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:56,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:56,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:56,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:56,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:56,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:56,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:56,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:56,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:56,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:56,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:56,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:56,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4600 backedges. 1552 proven. 242 refuted. 0 times theorem prover too weak. 2806 trivial. 0 not checked. [2021-05-02 18:51:56,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337295919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:56,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:56,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14] total 50 [2021-05-02 18:51:56,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129936424] [2021-05-02 18:51:56,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 18:51:56,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:56,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 18:51:56,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 18:51:56,241 INFO L87 Difference]: Start difference. First operand 192 states and 231 transitions. Second operand has 50 states, 50 states have (on average 2.72) internal successors, (136), 49 states have internal predecessors, (136), 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 18:51:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:58,176 INFO L93 Difference]: Finished difference Result 200 states and 243 transitions. [2021-05-02 18:51:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 18:51:58,176 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.72) internal successors, (136), 49 states have internal predecessors, (136), 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 191 [2021-05-02 18:51:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:58,177 INFO L225 Difference]: With dead ends: 200 [2021-05-02 18:51:58,177 INFO L226 Difference]: Without dead ends: 200 [2021-05-02 18:51:58,177 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 2497.2ms TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 18:51:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-02 18:51:58,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2021-05-02 18:51:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.217616580310881) internal successors, (235), 193 states have internal predecessors, (235), 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 18:51:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2021-05-02 18:51:58,180 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 191 [2021-05-02 18:51:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:58,180 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2021-05-02 18:51:58,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.72) internal successors, (136), 49 states have internal predecessors, (136), 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 18:51:58,180 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2021-05-02 18:51:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-02 18:51:58,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:58,181 INFO L523 BasicCegarLoop]: trace histogram [64, 35, 29, 29, 17, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:58,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 18:51:58,395 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:58,395 INFO L82 PathProgramCache]: Analyzing trace with hash -179657399, now seen corresponding path program 34 times [2021-05-02 18:51:58,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:58,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351545538] [2021-05-02 18:51:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:58,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:51:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:51:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4908 backedges. 2052 proven. 1260 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2021-05-02 18:51:58,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:51:58,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351545538] [2021-05-02 18:51:58,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351545538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:58,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288946174] [2021-05-02 18:51:58,928 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 18:51:58,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:51:58,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:51:58,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 18:51:58,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:51:59,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:51:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4908 backedges. 2052 proven. 1260 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2021-05-02 18:51:59,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288946174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:51:59,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:51:59,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 18:51:59,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609257656] [2021-05-02 18:51:59,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 18:51:59,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:51:59,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 18:51:59,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 18:51:59,217 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 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 18:52:00,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:00,410 INFO L93 Difference]: Finished difference Result 200 states and 241 transitions. [2021-05-02 18:52:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 18:52:00,411 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 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 18:52:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:00,411 INFO L225 Difference]: With dead ends: 200 [2021-05-02 18:52:00,411 INFO L226 Difference]: Without dead ends: 200 [2021-05-02 18:52:00,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1555.1ms TimeCoverageRelationStatistics Valid=2148, Invalid=3552, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 18:52:00,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-02 18:52:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-05-02 18:52:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.2153846153846153) internal successors, (237), 195 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 18:52:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 241 transitions. [2021-05-02 18:52:00,414 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 241 transitions. Word has length 197 [2021-05-02 18:52:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:00,414 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 241 transitions. [2021-05-02 18:52:00,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 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 18:52:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 241 transitions. [2021-05-02 18:52:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-05-02 18:52:00,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:00,415 INFO L523 BasicCegarLoop]: trace histogram [65, 36, 29, 29, 17, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:00,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 18:52:00,629 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash 373870439, now seen corresponding path program 35 times [2021-05-02 18:52:00,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:00,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003386643] [2021-05-02 18:52:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:01,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5037 backedges. 2109 proven. 1332 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2021-05-02 18:52:01,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:01,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003386643] [2021-05-02 18:52:01,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003386643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:01,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812133513] [2021-05-02 18:52:01,184 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 18:52:01,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-05-02 18:52:01,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:52:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 18:52:01,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:01,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:01,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:02,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:02,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:02,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:02,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:02,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:02,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5037 backedges. 3030 proven. 709 refuted. 0 times theorem prover too weak. 1298 trivial. 0 not checked. [2021-05-02 18:52:02,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812133513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:02,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:02,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 23] total 61 [2021-05-02 18:52:02,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909454609] [2021-05-02 18:52:02,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 18:52:02,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:02,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 18:52:02,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 18:52:02,192 INFO L87 Difference]: Start difference. First operand 200 states and 241 transitions. Second operand has 61 states, 61 states have (on average 2.7540983606557377) internal successors, (168), 60 states have internal predecessors, (168), 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 18:52:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:04,919 INFO L93 Difference]: Finished difference Result 218 states and 263 transitions. [2021-05-02 18:52:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 18:52:04,919 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.7540983606557377) internal successors, (168), 60 states have internal predecessors, (168), 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 18:52:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:04,920 INFO L225 Difference]: With dead ends: 218 [2021-05-02 18:52:04,920 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 18:52:04,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 3605.0ms TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 18:52:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 18:52:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-05-02 18:52:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.215962441314554) internal successors, (259), 213 states have internal predecessors, (259), 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 18:52:04,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 263 transitions. [2021-05-02 18:52:04,923 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 263 transitions. Word has length 199 [2021-05-02 18:52:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:04,923 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 263 transitions. [2021-05-02 18:52:04,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.7540983606557377) internal successors, (168), 60 states have internal predecessors, (168), 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 18:52:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 263 transitions. [2021-05-02 18:52:04,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-05-02 18:52:04,924 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:04,924 INFO L523 BasicCegarLoop]: trace histogram [70, 37, 33, 33, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:05,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 18:52:05,137 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:05,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1406696677, now seen corresponding path program 36 times [2021-05-02 18:52:05,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:05,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637185778] [2021-05-02 18:52:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:05,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 2470 proven. 1406 refuted. 0 times theorem prover too weak. 2080 trivial. 0 not checked. [2021-05-02 18:52:05,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:05,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637185778] [2021-05-02 18:52:05,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637185778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:05,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741647774] [2021-05-02 18:52:05,790 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 18:52:05,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2021-05-02 18:52:05,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:52:05,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 18:52:05,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:06,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 1962 proven. 288 refuted. 0 times theorem prover too weak. 3706 trivial. 0 not checked. [2021-05-02 18:52:06,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741647774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:06,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:06,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 15] total 54 [2021-05-02 18:52:06,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741460984] [2021-05-02 18:52:06,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 18:52:06,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:06,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 18:52:06,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 18:52:06,550 INFO L87 Difference]: Start difference. First operand 218 states and 263 transitions. Second operand has 54 states, 54 states have (on average 2.7037037037037037) internal successors, (146), 53 states have internal predecessors, (146), 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 18:52:08,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:08,744 INFO L93 Difference]: Finished difference Result 226 states and 275 transitions. [2021-05-02 18:52:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 18:52:08,744 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.7037037037037037) internal successors, (146), 53 states have internal predecessors, (146), 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 217 [2021-05-02 18:52:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:08,745 INFO L225 Difference]: With dead ends: 226 [2021-05-02 18:52:08,745 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 18:52:08,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 2915.8ms TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 18:52:08,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 18:52:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2021-05-02 18:52:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.2191780821917808) internal successors, (267), 219 states have internal predecessors, (267), 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 18:52:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 271 transitions. [2021-05-02 18:52:08,748 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 271 transitions. Word has length 217 [2021-05-02 18:52:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:08,748 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 271 transitions. [2021-05-02 18:52:08,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.7037037037037037) internal successors, (146), 53 states have internal predecessors, (146), 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 18:52:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 271 transitions. [2021-05-02 18:52:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-05-02 18:52:08,749 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:08,749 INFO L523 BasicCegarLoop]: trace histogram [72, 38, 34, 34, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:08,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 18:52:08,963 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:08,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1237426428, now seen corresponding path program 37 times [2021-05-02 18:52:08,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:08,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649197507] [2021-05-02 18:52:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:09,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6306 backedges. 2613 proven. 1482 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-02 18:52:09,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:09,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649197507] [2021-05-02 18:52:09,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649197507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:09,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292565975] [2021-05-02 18:52:09,625 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 18:52:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:09,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 18:52:09,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:09,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6306 backedges. 2613 proven. 1482 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-02 18:52:09,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292565975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:09,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:09,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 18:52:09,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133449115] [2021-05-02 18:52:09,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 18:52:09,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:09,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 18:52:09,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 18:52:09,963 INFO L87 Difference]: Start difference. First operand 224 states and 271 transitions. Second operand has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 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 18:52:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:11,408 INFO L93 Difference]: Finished difference Result 226 states and 273 transitions. [2021-05-02 18:52:11,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 18:52:11,408 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 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 223 [2021-05-02 18:52:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:11,409 INFO L225 Difference]: With dead ends: 226 [2021-05-02 18:52:11,409 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 18:52:11,410 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1843.3ms TimeCoverageRelationStatistics Valid=2502, Invalid=4140, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 18:52:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 18:52:11,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-05-02 18:52:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.2171945701357465) internal successors, (269), 221 states have internal predecessors, (269), 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 18:52:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 273 transitions. [2021-05-02 18:52:11,412 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 273 transitions. Word has length 223 [2021-05-02 18:52:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:11,412 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 273 transitions. [2021-05-02 18:52:11,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 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 18:52:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 273 transitions. [2021-05-02 18:52:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-05-02 18:52:11,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:11,413 INFO L523 BasicCegarLoop]: trace histogram [73, 39, 34, 34, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:11,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:52:11,628 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:11,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:11,628 INFO L82 PathProgramCache]: Analyzing trace with hash 226443674, now seen corresponding path program 38 times [2021-05-02 18:52:11,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:11,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505154885] [2021-05-02 18:52:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:12,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6451 backedges. 2680 proven. 1560 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-02 18:52:12,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505154885] [2021-05-02 18:52:12,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505154885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551353543] [2021-05-02 18:52:12,301 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 18:52:12,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:52:12,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:52:12,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 18:52:12,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:12,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6451 backedges. 2680 proven. 1560 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-02 18:52:12,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551353543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:12,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:12,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-02 18:52:12,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39422797] [2021-05-02 18:52:12,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 18:52:12,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:12,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 18:52:12,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 18:52:12,643 INFO L87 Difference]: Start difference. First operand 226 states and 273 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 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 18:52:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:14,159 INFO L93 Difference]: Finished difference Result 228 states and 275 transitions. [2021-05-02 18:52:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 18:52:14,159 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 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 225 [2021-05-02 18:52:14,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:14,160 INFO L225 Difference]: With dead ends: 228 [2021-05-02 18:52:14,160 INFO L226 Difference]: Without dead ends: 228 [2021-05-02 18:52:14,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1897.1ms TimeCoverageRelationStatistics Valid=2626, Invalid=4346, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 18:52:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-02 18:52:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-05-02 18:52:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.2152466367713004) internal successors, (271), 223 states have internal predecessors, (271), 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 18:52:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 275 transitions. [2021-05-02 18:52:14,163 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 275 transitions. Word has length 225 [2021-05-02 18:52:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:14,163 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 275 transitions. [2021-05-02 18:52:14,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 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 18:52:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 275 transitions. [2021-05-02 18:52:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-05-02 18:52:14,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:14,164 INFO L523 BasicCegarLoop]: trace histogram [74, 40, 34, 34, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:14,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:52:14,364 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:14,365 INFO L82 PathProgramCache]: Analyzing trace with hash -665374024, now seen corresponding path program 39 times [2021-05-02 18:52:14,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:14,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128861345] [2021-05-02 18:52:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:15,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6598 backedges. 2747 proven. 1640 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-02 18:52:15,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:15,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128861345] [2021-05-02 18:52:15,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128861345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:15,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889553866] [2021-05-02 18:52:15,030 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 18:52:15,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 18:52:15,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:52:15,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 18:52:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:15,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6598 backedges. 2200 proven. 338 refuted. 0 times theorem prover too weak. 4060 trivial. 0 not checked. [2021-05-02 18:52:15,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889553866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:15,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:15,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 16] total 58 [2021-05-02 18:52:15,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759999166] [2021-05-02 18:52:15,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 18:52:15,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:15,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 18:52:15,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 18:52:15,823 INFO L87 Difference]: Start difference. First operand 228 states and 275 transitions. Second operand has 58 states, 58 states have (on average 2.689655172413793) internal successors, (156), 57 states have internal predecessors, (156), 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 18:52:18,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:18,271 INFO L93 Difference]: Finished difference Result 236 states and 287 transitions. [2021-05-02 18:52:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 18:52:18,272 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.689655172413793) internal successors, (156), 57 states have internal predecessors, (156), 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 227 [2021-05-02 18:52:18,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:18,272 INFO L225 Difference]: With dead ends: 236 [2021-05-02 18:52:18,273 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 18:52:18,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 3220.4ms TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 18:52:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 18:52:18,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2021-05-02 18:52:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.2183406113537119) internal successors, (279), 229 states have internal predecessors, (279), 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 18:52:18,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 283 transitions. [2021-05-02 18:52:18,276 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 283 transitions. Word has length 227 [2021-05-02 18:52:18,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:18,276 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 283 transitions. [2021-05-02 18:52:18,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.689655172413793) internal successors, (156), 57 states have internal predecessors, (156), 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 18:52:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 283 transitions. [2021-05-02 18:52:18,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-05-02 18:52:18,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:18,277 INFO L523 BasicCegarLoop]: trace histogram [76, 41, 35, 35, 21, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:18,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:52:18,489 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:18,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:18,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1854678991, now seen corresponding path program 40 times [2021-05-02 18:52:18,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:18,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23408683] [2021-05-02 18:52:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:19,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6966 backedges. 2898 proven. 1722 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2021-05-02 18:52:19,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:19,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23408683] [2021-05-02 18:52:19,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23408683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:19,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212637832] [2021-05-02 18:52:19,293 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 18:52:19,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:52:19,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:52:19,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 18:52:19,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:19,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6966 backedges. 2898 proven. 1722 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2021-05-02 18:52:19,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212637832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:19,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:19,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 18:52:19,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737928944] [2021-05-02 18:52:19,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 18:52:19,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:19,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 18:52:19,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 18:52:19,665 INFO L87 Difference]: Start difference. First operand 234 states and 283 transitions. Second operand has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 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 18:52:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:21,240 INFO L93 Difference]: Finished difference Result 236 states and 285 transitions. [2021-05-02 18:52:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 18:52:21,240 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 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 233 [2021-05-02 18:52:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:21,241 INFO L225 Difference]: With dead ends: 236 [2021-05-02 18:52:21,241 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 18:52:21,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2137.0ms TimeCoverageRelationStatistics Valid=2883, Invalid=4773, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 18:52:21,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 18:52:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-05-02 18:52:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.2164502164502164) internal successors, (281), 231 states have internal predecessors, (281), 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 18:52:21,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2021-05-02 18:52:21,244 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 233 [2021-05-02 18:52:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:21,244 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2021-05-02 18:52:21,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 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 18:52:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2021-05-02 18:52:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-05-02 18:52:21,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:21,245 INFO L523 BasicCegarLoop]: trace histogram [77, 42, 35, 35, 21, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:21,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-02 18:52:21,457 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:21,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:21,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1055398637, now seen corresponding path program 41 times [2021-05-02 18:52:21,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:21,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587154253] [2021-05-02 18:52:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:22,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 2967 proven. 1806 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2021-05-02 18:52:22,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:22,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587154253] [2021-05-02 18:52:22,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587154253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:22,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649587317] [2021-05-02 18:52:22,197 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 18:52:22,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2021-05-02 18:52:22,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:52:22,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 18:52:22,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:22,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:22,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 4258 proven. 1041 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2021-05-02 18:52:23,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649587317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:23,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:23,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 27] total 71 [2021-05-02 18:52:23,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748934503] [2021-05-02 18:52:23,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 18:52:23,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:23,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 18:52:23,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 18:52:23,568 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand has 71 states, 71 states have (on average 2.76056338028169) internal successors, (196), 70 states have internal predecessors, (196), 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 18:52:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:26,991 INFO L93 Difference]: Finished difference Result 254 states and 307 transitions. [2021-05-02 18:52:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 18:52:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.76056338028169) internal successors, (196), 70 states have internal predecessors, (196), 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 235 [2021-05-02 18:52:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:26,992 INFO L225 Difference]: With dead ends: 254 [2021-05-02 18:52:26,992 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 18:52:26,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 4738.3ms TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 18:52:26,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 18:52:26,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-05-02 18:52:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.216867469879518) internal successors, (303), 249 states have internal predecessors, (303), 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 18:52:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 307 transitions. [2021-05-02 18:52:26,996 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 307 transitions. Word has length 235 [2021-05-02 18:52:26,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:26,996 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 307 transitions. [2021-05-02 18:52:26,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.76056338028169) internal successors, (196), 70 states have internal predecessors, (196), 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 18:52:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 307 transitions. [2021-05-02 18:52:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-05-02 18:52:26,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:26,997 INFO L523 BasicCegarLoop]: trace histogram [82, 43, 39, 39, 25, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:27,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:52:27,202 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:27,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:27,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1216755349, now seen corresponding path program 42 times [2021-05-02 18:52:27,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:27,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034955850] [2021-05-02 18:52:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:27,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8206 backedges. 3388 proven. 1892 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-05-02 18:52:27,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:27,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034955850] [2021-05-02 18:52:27,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034955850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:27,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888737181] [2021-05-02 18:52:27,994 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 18:52:28,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2021-05-02 18:52:28,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:52:28,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 18:52:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:28,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8206 backedges. 2682 proven. 392 refuted. 0 times theorem prover too weak. 5132 trivial. 0 not checked. [2021-05-02 18:52:28,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888737181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:28,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:28,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 17] total 62 [2021-05-02 18:52:28,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853247826] [2021-05-02 18:52:28,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 18:52:28,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:28,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 18:52:28,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 18:52:28,986 INFO L87 Difference]: Start difference. First operand 254 states and 307 transitions. Second operand has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 61 states have internal predecessors, (166), 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 18:52:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:31,728 INFO L93 Difference]: Finished difference Result 262 states and 319 transitions. [2021-05-02 18:52:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 18:52:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 61 states have internal predecessors, (166), 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 253 [2021-05-02 18:52:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:31,729 INFO L225 Difference]: With dead ends: 262 [2021-05-02 18:52:31,730 INFO L226 Difference]: Without dead ends: 262 [2021-05-02 18:52:31,730 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 3708.4ms TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 18:52:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-02 18:52:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2021-05-02 18:52:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.219607843137255) internal successors, (311), 255 states have internal predecessors, (311), 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 18:52:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-05-02 18:52:31,733 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 253 [2021-05-02 18:52:31,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:31,733 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-05-02 18:52:31,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 61 states have internal predecessors, (166), 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 18:52:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-05-02 18:52:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-05-02 18:52:31,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:31,734 INFO L523 BasicCegarLoop]: trace histogram [84, 44, 40, 40, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:31,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:52:31,957 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1072692350, now seen corresponding path program 43 times [2021-05-02 18:52:31,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:31,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092195302] [2021-05-02 18:52:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:32,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8616 backedges. 3555 proven. 1980 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-02 18:52:32,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:32,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092195302] [2021-05-02 18:52:32,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092195302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:32,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787555202] [2021-05-02 18:52:32,767 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 18:52:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:32,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 18:52:32,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:32,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:32,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8616 backedges. 3555 proven. 1980 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-02 18:52:33,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787555202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:33,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:33,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 18:52:33,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214418136] [2021-05-02 18:52:33,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 18:52:33,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:33,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 18:52:33,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 18:52:33,159 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 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 18:52:34,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:34,940 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2021-05-02 18:52:34,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 18:52:34,940 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 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 259 [2021-05-02 18:52:34,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:34,941 INFO L225 Difference]: With dead ends: 262 [2021-05-02 18:52:34,941 INFO L226 Difference]: Without dead ends: 262 [2021-05-02 18:52:34,941 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2351.8ms TimeCoverageRelationStatistics Valid=3291, Invalid=5451, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 18:52:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-02 18:52:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-05-02 18:52:34,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.2178988326848248) internal successors, (313), 257 states have internal predecessors, (313), 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 18:52:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 317 transitions. [2021-05-02 18:52:34,944 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 317 transitions. Word has length 259 [2021-05-02 18:52:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:34,944 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 317 transitions. [2021-05-02 18:52:34,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 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 18:52:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 317 transitions. [2021-05-02 18:52:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-05-02 18:52:34,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:34,945 INFO L523 BasicCegarLoop]: trace histogram [85, 45, 40, 40, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:35,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 18:52:35,146 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:35,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:35,146 INFO L82 PathProgramCache]: Analyzing trace with hash 789720352, now seen corresponding path program 44 times [2021-05-02 18:52:35,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:35,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073766438] [2021-05-02 18:52:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:36,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8785 backedges. 3634 proven. 2070 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-02 18:52:36,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:36,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073766438] [2021-05-02 18:52:36,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073766438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:36,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125190628] [2021-05-02 18:52:36,011 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 18:52:36,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:52:36,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:52:36,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 18:52:36,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:36,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8785 backedges. 3634 proven. 2070 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-02 18:52:36,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125190628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:36,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:36,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-02 18:52:36,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363553175] [2021-05-02 18:52:36,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 18:52:36,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:36,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 18:52:36,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 18:52:36,386 INFO L87 Difference]: Start difference. First operand 262 states and 317 transitions. Second operand has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 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 18:52:38,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:38,282 INFO L93 Difference]: Finished difference Result 264 states and 319 transitions. [2021-05-02 18:52:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 18:52:38,283 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 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 261 [2021-05-02 18:52:38,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:38,283 INFO L225 Difference]: With dead ends: 264 [2021-05-02 18:52:38,284 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 18:52:38,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 2445.8ms TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 18:52:38,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 18:52:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-05-02 18:52:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.2162162162162162) internal successors, (315), 259 states have internal predecessors, (315), 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 18:52:38,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 319 transitions. [2021-05-02 18:52:38,286 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 319 transitions. Word has length 261 [2021-05-02 18:52:38,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:38,287 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 319 transitions. [2021-05-02 18:52:38,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 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 18:52:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 319 transitions. [2021-05-02 18:52:38,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-05-02 18:52:38,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:38,288 INFO L523 BasicCegarLoop]: trace histogram [86, 46, 40, 40, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:38,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 18:52:38,503 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:38,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:38,503 INFO L82 PathProgramCache]: Analyzing trace with hash -433035458, now seen corresponding path program 45 times [2021-05-02 18:52:38,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:38,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482052599] [2021-05-02 18:52:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:39,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8956 backedges. 3713 proven. 2162 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-02 18:52:39,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:39,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482052599] [2021-05-02 18:52:39,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482052599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:39,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970116482] [2021-05-02 18:52:39,439 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 18:52:39,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-05-02 18:52:39,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:52:39,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 18:52:39,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:39,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:39,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:39,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:39,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:39,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:39,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:39,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:39,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:39,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:39,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:39,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:39,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8956 backedges. 2960 proven. 450 refuted. 0 times theorem prover too weak. 5546 trivial. 0 not checked. [2021-05-02 18:52:40,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970116482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:40,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:40,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 18] total 66 [2021-05-02 18:52:40,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225477711] [2021-05-02 18:52:40,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 18:52:40,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:40,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 18:52:40,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 18:52:40,506 INFO L87 Difference]: Start difference. First operand 264 states and 319 transitions. Second operand has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 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 18:52:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:43,604 INFO L93 Difference]: Finished difference Result 272 states and 331 transitions. [2021-05-02 18:52:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 18:52:43,605 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 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 263 [2021-05-02 18:52:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:43,606 INFO L225 Difference]: With dead ends: 272 [2021-05-02 18:52:43,606 INFO L226 Difference]: Without dead ends: 272 [2021-05-02 18:52:43,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 4249.8ms TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 18:52:43,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-02 18:52:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 270. [2021-05-02 18:52:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.2188679245283018) internal successors, (323), 265 states have internal predecessors, (323), 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 18:52:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 327 transitions. [2021-05-02 18:52:43,609 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 327 transitions. Word has length 263 [2021-05-02 18:52:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:43,609 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 327 transitions. [2021-05-02 18:52:43,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 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 18:52:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 327 transitions. [2021-05-02 18:52:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-05-02 18:52:43,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:43,610 INFO L523 BasicCegarLoop]: trace histogram [88, 47, 41, 41, 25, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:43,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 18:52:43,825 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:43,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1833487787, now seen corresponding path program 46 times [2021-05-02 18:52:43,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:43,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115697488] [2021-05-02 18:52:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:44,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 3888 proven. 2256 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2021-05-02 18:52:44,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:44,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115697488] [2021-05-02 18:52:44,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115697488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:44,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953347108] [2021-05-02 18:52:44,738 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 18:52:44,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:52:44,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:52:44,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 18:52:44,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:44,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:44,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 3888 proven. 2256 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2021-05-02 18:52:45,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953347108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:45,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:45,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 18:52:45,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134091922] [2021-05-02 18:52:45,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 18:52:45,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 18:52:45,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 18:52:45,130 INFO L87 Difference]: Start difference. First operand 270 states and 327 transitions. Second operand has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 states have internal predecessors, (112), 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 18:52:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:47,090 INFO L93 Difference]: Finished difference Result 272 states and 329 transitions. [2021-05-02 18:52:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 18:52:47,090 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 states have internal predecessors, (112), 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 269 [2021-05-02 18:52:47,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:47,091 INFO L225 Difference]: With dead ends: 272 [2021-05-02 18:52:47,091 INFO L226 Difference]: Without dead ends: 272 [2021-05-02 18:52:47,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 2577.2ms TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 18:52:47,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-02 18:52:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-05-02 18:52:47,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.2172284644194757) internal successors, (325), 267 states have internal predecessors, (325), 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 18:52:47,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 329 transitions. [2021-05-02 18:52:47,094 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 329 transitions. Word has length 269 [2021-05-02 18:52:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:47,094 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 329 transitions. [2021-05-02 18:52:47,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 states have internal predecessors, (112), 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 18:52:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 329 transitions. [2021-05-02 18:52:47,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-05-02 18:52:47,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:47,095 INFO L523 BasicCegarLoop]: trace histogram [89, 48, 41, 41, 25, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:47,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:52:47,309 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:47,309 INFO L82 PathProgramCache]: Analyzing trace with hash 755002995, now seen corresponding path program 47 times [2021-05-02 18:52:47,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:47,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028123214] [2021-05-02 18:52:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:48,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9561 backedges. 3969 proven. 2352 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2021-05-02 18:52:48,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:48,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028123214] [2021-05-02 18:52:48,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028123214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:48,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420468176] [2021-05-02 18:52:48,259 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 18:52:48,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2021-05-02 18:52:48,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:52:48,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 18:52:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:48,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:48,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9561 backedges. 5694 proven. 1437 refuted. 0 times theorem prover too weak. 2430 trivial. 0 not checked. [2021-05-02 18:52:49,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420468176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:49,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:49,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 31] total 81 [2021-05-02 18:52:49,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17163216] [2021-05-02 18:52:49,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 18:52:49,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:49,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 18:52:49,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 18:52:49,979 INFO L87 Difference]: Start difference. First operand 272 states and 329 transitions. Second operand has 81 states, 81 states have (on average 2.765432098765432) internal successors, (224), 80 states have internal predecessors, (224), 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 18:52:54,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:52:54,279 INFO L93 Difference]: Finished difference Result 290 states and 351 transitions. [2021-05-02 18:52:54,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 18:52:54,279 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.765432098765432) internal successors, (224), 80 states have internal predecessors, (224), 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 271 [2021-05-02 18:52:54,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:52:54,280 INFO L225 Difference]: With dead ends: 290 [2021-05-02 18:52:54,280 INFO L226 Difference]: Without dead ends: 290 [2021-05-02 18:52:54,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 6074.6ms TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2021-05-02 18:52:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-02 18:52:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-05-02 18:52:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.2175438596491228) internal successors, (347), 285 states have internal predecessors, (347), 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 18:52:54,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 351 transitions. [2021-05-02 18:52:54,283 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 351 transitions. Word has length 271 [2021-05-02 18:52:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:52:54,283 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 351 transitions. [2021-05-02 18:52:54,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.765432098765432) internal successors, (224), 80 states have internal predecessors, (224), 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 18:52:54,284 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 351 transitions. [2021-05-02 18:52:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-05-02 18:52:54,285 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:52:54,285 INFO L523 BasicCegarLoop]: trace histogram [94, 49, 45, 45, 29, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:52:54,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:52:54,485 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:52:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:52:54,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2135974415, now seen corresponding path program 48 times [2021-05-02 18:52:54,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:52:54,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691605139] [2021-05-02 18:52:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:52:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:55,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:52:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:52:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 4450 proven. 2450 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-05-02 18:52:55,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:52:55,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691605139] [2021-05-02 18:52:55,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691605139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:55,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602225874] [2021-05-02 18:52:55,546 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 18:52:55,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-05-02 18:52:55,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:52:55,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 18:52:55,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:52:55,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:55,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:52:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 3514 proven. 512 refuted. 0 times theorem prover too weak. 6790 trivial. 0 not checked. [2021-05-02 18:52:56,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602225874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:52:56,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:52:56,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 19] total 70 [2021-05-02 18:52:56,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311616763] [2021-05-02 18:52:56,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 18:52:56,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:52:56,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 18:52:56,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 18:52:56,862 INFO L87 Difference]: Start difference. First operand 290 states and 351 transitions. Second operand has 70 states, 70 states have (on average 2.657142857142857) internal successors, (186), 69 states have internal predecessors, (186), 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 18:53:00,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:53:00,603 INFO L93 Difference]: Finished difference Result 298 states and 363 transitions. [2021-05-02 18:53:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 18:53:00,604 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.657142857142857) internal successors, (186), 69 states have internal predecessors, (186), 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 289 [2021-05-02 18:53:00,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:53:00,604 INFO L225 Difference]: With dead ends: 298 [2021-05-02 18:53:00,604 INFO L226 Difference]: Without dead ends: 298 [2021-05-02 18:53:00,605 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2260 ImplicationChecksByTransitivity, 5090.1ms TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 18:53:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-02 18:53:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 296. [2021-05-02 18:53:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.2199312714776633) internal successors, (355), 291 states have internal predecessors, (355), 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 18:53:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 359 transitions. [2021-05-02 18:53:00,607 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 359 transitions. Word has length 289 [2021-05-02 18:53:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:53:00,608 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 359 transitions. [2021-05-02 18:53:00,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.657142857142857) internal successors, (186), 69 states have internal predecessors, (186), 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 18:53:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 359 transitions. [2021-05-02 18:53:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-05-02 18:53:00,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:53:00,609 INFO L523 BasicCegarLoop]: trace histogram [96, 50, 46, 46, 29, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:53:00,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 18:53:00,824 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:53:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:53:00,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1920888328, now seen corresponding path program 49 times [2021-05-02 18:53:00,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:53:00,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810016693] [2021-05-02 18:53:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:53:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:01,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:53:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11286 backedges. 4641 proven. 2550 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-02 18:53:01,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:53:01,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810016693] [2021-05-02 18:53:01,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810016693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:01,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818567931] [2021-05-02 18:53:01,934 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 18:53:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:02,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 18:53:02,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:53:02,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11286 backedges. 4641 proven. 2550 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-02 18:53:02,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818567931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:02,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:53:02,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 18:53:02,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224888248] [2021-05-02 18:53:02,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 18:53:02,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:53:02,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 18:53:02,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 18:53:02,370 INFO L87 Difference]: Start difference. First operand 296 states and 359 transitions. Second operand has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 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 18:53:04,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:53:04,657 INFO L93 Difference]: Finished difference Result 298 states and 361 transitions. [2021-05-02 18:53:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 18:53:04,658 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 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 295 [2021-05-02 18:53:04,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:53:04,659 INFO L225 Difference]: With dead ends: 298 [2021-05-02 18:53:04,659 INFO L226 Difference]: Without dead ends: 298 [2021-05-02 18:53:04,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 3143.5ms TimeCoverageRelationStatistics Valid=4188, Invalid=6942, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 18:53:04,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-02 18:53:04,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-05-02 18:53:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.2184300341296928) internal successors, (357), 293 states have internal predecessors, (357), 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 18:53:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 361 transitions. [2021-05-02 18:53:04,662 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 361 transitions. Word has length 295 [2021-05-02 18:53:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:53:04,662 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 361 transitions. [2021-05-02 18:53:04,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 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 18:53:04,662 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 361 transitions. [2021-05-02 18:53:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-05-02 18:53:04,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:53:04,663 INFO L523 BasicCegarLoop]: trace histogram [97, 51, 46, 46, 29, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:53:04,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:53:04,873 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:53:04,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:53:04,873 INFO L82 PathProgramCache]: Analyzing trace with hash 183804070, now seen corresponding path program 50 times [2021-05-02 18:53:04,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:53:04,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463586884] [2021-05-02 18:53:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:53:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:05,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:53:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11479 backedges. 4732 proven. 2652 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-02 18:53:05,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:53:05,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463586884] [2021-05-02 18:53:05,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463586884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:05,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773889689] [2021-05-02 18:53:05,919 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 18:53:06,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:53:06,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:53:06,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 18:53:06,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:53:06,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11479 backedges. 4732 proven. 2652 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-02 18:53:06,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773889689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:06,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:53:06,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-05-02 18:53:06,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081940160] [2021-05-02 18:53:06,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 18:53:06,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:53:06,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 18:53:06,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:53:06,348 INFO L87 Difference]: Start difference. First operand 298 states and 361 transitions. Second operand has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 states have internal predecessors, (120), 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 18:53:08,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:53:08,583 INFO L93 Difference]: Finished difference Result 300 states and 363 transitions. [2021-05-02 18:53:08,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 18:53:08,583 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 states have internal predecessors, (120), 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 297 [2021-05-02 18:53:08,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:53:08,584 INFO L225 Difference]: With dead ends: 300 [2021-05-02 18:53:08,584 INFO L226 Difference]: Without dead ends: 300 [2021-05-02 18:53:08,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2946.9ms TimeCoverageRelationStatistics Valid=4348, Invalid=7208, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 18:53:08,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-02 18:53:08,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-05-02 18:53:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.2169491525423728) internal successors, (359), 295 states have internal predecessors, (359), 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 18:53:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 363 transitions. [2021-05-02 18:53:08,587 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 363 transitions. Word has length 297 [2021-05-02 18:53:08,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:53:08,587 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 363 transitions. [2021-05-02 18:53:08,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 states have internal predecessors, (120), 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 18:53:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 363 transitions. [2021-05-02 18:53:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-05-02 18:53:08,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:53:08,588 INFO L523 BasicCegarLoop]: trace histogram [98, 52, 46, 46, 29, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:53:08,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-02 18:53:08,803 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:53:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:53:08,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1588110276, now seen corresponding path program 51 times [2021-05-02 18:53:08,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:53:08,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001698230] [2021-05-02 18:53:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:53:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:09,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:53:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11674 backedges. 4823 proven. 2756 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-02 18:53:09,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:53:09,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001698230] [2021-05-02 18:53:09,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001698230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:09,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969097697] [2021-05-02 18:53:09,907 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 18:53:09,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-05-02 18:53:09,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:53:09,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 18:53:09,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:53:10,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:10,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:11,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:11,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:11,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:11,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11674 backedges. 3832 proven. 578 refuted. 0 times theorem prover too weak. 7264 trivial. 0 not checked. [2021-05-02 18:53:11,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969097697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:11,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:53:11,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 20] total 74 [2021-05-02 18:53:11,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634961081] [2021-05-02 18:53:11,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 18:53:11,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:53:11,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 18:53:11,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 18:53:11,126 INFO L87 Difference]: Start difference. First operand 300 states and 363 transitions. Second operand has 74 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 73 states have internal predecessors, (196), 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 18:53:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:53:14,836 INFO L93 Difference]: Finished difference Result 308 states and 375 transitions. [2021-05-02 18:53:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 18:53:14,836 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 73 states have internal predecessors, (196), 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 299 [2021-05-02 18:53:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:53:14,837 INFO L225 Difference]: With dead ends: 308 [2021-05-02 18:53:14,837 INFO L226 Difference]: Without dead ends: 308 [2021-05-02 18:53:14,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2537 ImplicationChecksByTransitivity, 5129.9ms TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2021-05-02 18:53:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-02 18:53:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 306. [2021-05-02 18:53:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.2192691029900333) internal successors, (367), 301 states have internal predecessors, (367), 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 18:53:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 371 transitions. [2021-05-02 18:53:14,840 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 371 transitions. Word has length 299 [2021-05-02 18:53:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:53:14,840 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 371 transitions. [2021-05-02 18:53:14,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 73 states have internal predecessors, (196), 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 18:53:14,841 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 371 transitions. [2021-05-02 18:53:14,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-05-02 18:53:14,842 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:53:14,842 INFO L523 BasicCegarLoop]: trace histogram [100, 53, 47, 47, 29, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:53:15,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 18:53:15,042 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:53:15,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:53:15,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1097647323, now seen corresponding path program 52 times [2021-05-02 18:53:15,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:53:15,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735840625] [2021-05-02 18:53:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:53:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:16,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:53:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12162 backedges. 5022 proven. 2862 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2021-05-02 18:53:16,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:53:16,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735840625] [2021-05-02 18:53:16,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735840625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:16,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083828828] [2021-05-02 18:53:16,175 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 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 18:53:16,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:53:16,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:53:16,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 18:53:16,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:53:16,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12162 backedges. 5022 proven. 2862 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2021-05-02 18:53:16,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083828828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:16,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:53:16,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2021-05-02 18:53:16,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798445410] [2021-05-02 18:53:16,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 18:53:16,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:53:16,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 18:53:16,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 18:53:16,637 INFO L87 Difference]: Start difference. First operand 306 states and 371 transitions. Second operand has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 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 18:53:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:53:19,031 INFO L93 Difference]: Finished difference Result 308 states and 373 transitions. [2021-05-02 18:53:19,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 18:53:19,032 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 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 305 [2021-05-02 18:53:19,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:53:19,033 INFO L225 Difference]: With dead ends: 308 [2021-05-02 18:53:19,033 INFO L226 Difference]: Without dead ends: 308 [2021-05-02 18:53:19,033 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 3173.0ms TimeCoverageRelationStatistics Valid=4677, Invalid=7755, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 18:53:19,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-02 18:53:19,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-05-02 18:53:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 303 states have (on average 1.2178217821782178) internal successors, (369), 303 states have internal predecessors, (369), 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 18:53:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 373 transitions. [2021-05-02 18:53:19,036 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 373 transitions. Word has length 305 [2021-05-02 18:53:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:53:19,036 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 373 transitions. [2021-05-02 18:53:19,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 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 18:53:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 373 transitions. [2021-05-02 18:53:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-05-02 18:53:19,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:53:19,037 INFO L523 BasicCegarLoop]: trace histogram [101, 54, 47, 47, 29, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:53:19,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-02 18:53:19,247 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:53:19,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:53:19,247 INFO L82 PathProgramCache]: Analyzing trace with hash -831337991, now seen corresponding path program 53 times [2021-05-02 18:53:19,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:53:19,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514539280] [2021-05-02 18:53:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:53:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:20,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:53:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12363 backedges. 5115 proven. 2970 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2021-05-02 18:53:20,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:53:20,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514539280] [2021-05-02 18:53:20,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514539280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:20,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488655239] [2021-05-02 18:53:20,433 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 18:53:20,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2021-05-02 18:53:20,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:53:20,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 18:53:20,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:53:20,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:20,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:21,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12363 backedges. 7338 proven. 1897 refuted. 0 times theorem prover too weak. 3128 trivial. 0 not checked. [2021-05-02 18:53:22,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488655239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:22,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:53:22,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 35] total 91 [2021-05-02 18:53:22,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771334695] [2021-05-02 18:53:22,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 18:53:22,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:53:22,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 18:53:22,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 18:53:22,592 INFO L87 Difference]: Start difference. First operand 308 states and 373 transitions. Second operand has 91 states, 91 states have (on average 2.769230769230769) internal successors, (252), 90 states have internal predecessors, (252), 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 18:53:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:53:27,954 INFO L93 Difference]: Finished difference Result 326 states and 395 transitions. [2021-05-02 18:53:27,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 18:53:27,955 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.769230769230769) internal successors, (252), 90 states have internal predecessors, (252), 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 307 [2021-05-02 18:53:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:53:27,956 INFO L225 Difference]: With dead ends: 326 [2021-05-02 18:53:27,956 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 18:53:27,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3882 ImplicationChecksByTransitivity, 7650.9ms TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2021-05-02 18:53:27,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 18:53:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2021-05-02 18:53:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 321 states have (on average 1.2180685358255452) internal successors, (391), 321 states have internal predecessors, (391), 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 18:53:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 395 transitions. [2021-05-02 18:53:27,959 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 395 transitions. Word has length 307 [2021-05-02 18:53:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:53:27,959 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 395 transitions. [2021-05-02 18:53:27,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.769230769230769) internal successors, (252), 90 states have internal predecessors, (252), 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 18:53:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 395 transitions. [2021-05-02 18:53:27,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-05-02 18:53:27,960 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:53:27,961 INFO L523 BasicCegarLoop]: trace histogram [106, 55, 51, 51, 33, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:53:28,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-02 18:53:28,176 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:53:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:53:28,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2107308663, now seen corresponding path program 54 times [2021-05-02 18:53:28,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:53:28,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326605011] [2021-05-02 18:53:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:53:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:29,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:53:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13786 backedges. 5656 proven. 3080 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2021-05-02 18:53:29,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:53:29,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326605011] [2021-05-02 18:53:29,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326605011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:29,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153002761] [2021-05-02 18:53:29,404 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 18:53:29,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 75 check-sat command(s) [2021-05-02 18:53:29,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:53:29,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 18:53:29,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:53:29,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:29,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:29,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:29,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:29,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:29,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:29,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:29,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13786 backedges. 4458 proven. 648 refuted. 0 times theorem prover too weak. 8680 trivial. 0 not checked. [2021-05-02 18:53:30,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153002761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:30,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:53:30,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 21] total 78 [2021-05-02 18:53:30,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751620740] [2021-05-02 18:53:30,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 18:53:30,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:53:30,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 18:53:30,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 18:53:30,856 INFO L87 Difference]: Start difference. First operand 326 states and 395 transitions. Second operand has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 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 18:53:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:53:34,997 INFO L93 Difference]: Finished difference Result 334 states and 407 transitions. [2021-05-02 18:53:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 18:53:34,998 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 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 325 [2021-05-02 18:53:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:53:34,999 INFO L225 Difference]: With dead ends: 334 [2021-05-02 18:53:34,999 INFO L226 Difference]: Without dead ends: 334 [2021-05-02 18:53:35,000 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2830 ImplicationChecksByTransitivity, 5763.3ms TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2021-05-02 18:53:35,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-02 18:53:35,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2021-05-02 18:53:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.2201834862385321) internal successors, (399), 327 states have internal predecessors, (399), 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 18:53:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 403 transitions. [2021-05-02 18:53:35,003 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 403 transitions. Word has length 325 [2021-05-02 18:53:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:53:35,003 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 403 transitions. [2021-05-02 18:53:35,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 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 18:53:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 403 transitions. [2021-05-02 18:53:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-05-02 18:53:35,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:53:35,004 INFO L523 BasicCegarLoop]: trace histogram [108, 56, 52, 52, 33, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:53:35,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:53:35,205 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:53:35,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:53:35,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2064785266, now seen corresponding path program 55 times [2021-05-02 18:53:35,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:53:35,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347958024] [2021-05-02 18:53:35,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:53:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:36,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:53:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14316 backedges. 5871 proven. 3192 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-02 18:53:36,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:53:36,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347958024] [2021-05-02 18:53:36,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347958024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:36,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838849501] [2021-05-02 18:53:36,493 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 18:53:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:36,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 18:53:36,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:53:36,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 14316 backedges. 5871 proven. 3192 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-02 18:53:36,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838849501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:36,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:53:36,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2021-05-02 18:53:36,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077909525] [2021-05-02 18:53:36,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 18:53:36,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:53:36,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 18:53:36,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 18:53:36,969 INFO L87 Difference]: Start difference. First operand 332 states and 403 transitions. Second operand has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 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 18:53:39,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:53:39,518 INFO L93 Difference]: Finished difference Result 334 states and 405 transitions. [2021-05-02 18:53:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 18:53:39,519 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 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 331 [2021-05-02 18:53:39,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:53:39,520 INFO L225 Difference]: With dead ends: 334 [2021-05-02 18:53:39,520 INFO L226 Difference]: Without dead ends: 334 [2021-05-02 18:53:39,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 3572.9ms TimeCoverageRelationStatistics Valid=5193, Invalid=8613, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 18:53:39,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-02 18:53:39,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2021-05-02 18:53:39,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 329 states have (on average 1.2188449848024316) internal successors, (401), 329 states have internal predecessors, (401), 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 18:53:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 405 transitions. [2021-05-02 18:53:39,523 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 405 transitions. Word has length 331 [2021-05-02 18:53:39,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:53:39,523 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 405 transitions. [2021-05-02 18:53:39,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 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 18:53:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 405 transitions. [2021-05-02 18:53:39,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-05-02 18:53:39,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:53:39,524 INFO L523 BasicCegarLoop]: trace histogram [109, 57, 52, 52, 33, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:53:39,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-02 18:53:39,740 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:53:39,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:53:39,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2092458964, now seen corresponding path program 56 times [2021-05-02 18:53:39,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:53:39,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67634016] [2021-05-02 18:53:39,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:53:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:41,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:53:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14533 backedges. 5974 proven. 3306 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-02 18:53:41,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:53:41,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67634016] [2021-05-02 18:53:41,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67634016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:41,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352757885] [2021-05-02 18:53:41,098 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:53:41,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:53:41,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:53:41,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 18:53:41,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:53:41,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14533 backedges. 5974 proven. 3306 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-02 18:53:41,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352757885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:41,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:53:41,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 62 [2021-05-02 18:53:41,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981011801] [2021-05-02 18:53:41,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 18:53:41,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:53:41,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 18:53:41,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 18:53:41,591 INFO L87 Difference]: Start difference. First operand 334 states and 405 transitions. Second operand has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 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 18:53:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:53:44,307 INFO L93 Difference]: Finished difference Result 336 states and 407 transitions. [2021-05-02 18:53:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 18:53:44,308 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 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 333 [2021-05-02 18:53:44,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:53:44,309 INFO L225 Difference]: With dead ends: 336 [2021-05-02 18:53:44,309 INFO L226 Difference]: Without dead ends: 336 [2021-05-02 18:53:44,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1878 ImplicationChecksByTransitivity, 3677.9ms TimeCoverageRelationStatistics Valid=5371, Invalid=8909, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 18:53:44,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-05-02 18:53:44,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2021-05-02 18:53:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 331 states have (on average 1.2175226586102719) internal successors, (403), 331 states have internal predecessors, (403), 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 18:53:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 407 transitions. [2021-05-02 18:53:44,326 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 407 transitions. Word has length 333 [2021-05-02 18:53:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:53:44,326 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 407 transitions. [2021-05-02 18:53:44,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 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 18:53:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 407 transitions. [2021-05-02 18:53:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-05-02 18:53:44,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:53:44,328 INFO L523 BasicCegarLoop]: trace histogram [110, 58, 52, 52, 33, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:53:44,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:53:44,550 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:53:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:53:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1377888330, now seen corresponding path program 57 times [2021-05-02 18:53:44,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:53:44,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477738128] [2021-05-02 18:53:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:53:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:46,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:53:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14752 backedges. 6077 proven. 3422 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-02 18:53:46,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:53:46,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477738128] [2021-05-02 18:53:46,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477738128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:46,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253948140] [2021-05-02 18:53:46,062 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:53:46,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-02 18:53:46,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:53:46,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 18:53:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:53:46,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:46,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14752 backedges. 4816 proven. 722 refuted. 0 times theorem prover too weak. 9214 trivial. 0 not checked. [2021-05-02 18:53:47,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253948140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:47,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:53:47,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 22] total 82 [2021-05-02 18:53:47,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746792731] [2021-05-02 18:53:47,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 18:53:47,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:53:47,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 18:53:47,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 18:53:47,723 INFO L87 Difference]: Start difference. First operand 336 states and 407 transitions. Second operand has 82 states, 82 states have (on average 2.6341463414634148) internal successors, (216), 81 states have internal predecessors, (216), 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 18:53:52,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:53:52,851 INFO L93 Difference]: Finished difference Result 344 states and 419 transitions. [2021-05-02 18:53:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 18:53:52,852 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.6341463414634148) internal successors, (216), 81 states have internal predecessors, (216), 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 335 [2021-05-02 18:53:52,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:53:52,852 INFO L225 Difference]: With dead ends: 344 [2021-05-02 18:53:52,852 INFO L226 Difference]: Without dead ends: 344 [2021-05-02 18:53:52,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3139 ImplicationChecksByTransitivity, 7040.7ms TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2021-05-02 18:53:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-02 18:53:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 342. [2021-05-02 18:53:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 337 states have (on average 1.2195845697329377) internal successors, (411), 337 states have internal predecessors, (411), 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 18:53:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 415 transitions. [2021-05-02 18:53:52,856 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 415 transitions. Word has length 335 [2021-05-02 18:53:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:53:52,856 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 415 transitions. [2021-05-02 18:53:52,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.6341463414634148) internal successors, (216), 81 states have internal predecessors, (216), 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 18:53:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 415 transitions. [2021-05-02 18:53:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-05-02 18:53:52,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:53:52,857 INFO L523 BasicCegarLoop]: trace histogram [112, 59, 53, 53, 33, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:53:53,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-05-02 18:53:53,058 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:53:53,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:53:53,058 INFO L82 PathProgramCache]: Analyzing trace with hash -254943391, now seen corresponding path program 58 times [2021-05-02 18:53:53,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:53:53,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195879778] [2021-05-02 18:53:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:53:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:54,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:53:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 15300 backedges. 6300 proven. 3540 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2021-05-02 18:53:54,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:53:54,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195879778] [2021-05-02 18:53:54,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195879778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:54,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616372173] [2021-05-02 18:53:54,565 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:53:54,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:53:54,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:53:54,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 18:53:54,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:53:54,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:54,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 15300 backedges. 6300 proven. 3540 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2021-05-02 18:53:55,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616372173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:55,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:53:55,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 64 [2021-05-02 18:53:55,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945773038] [2021-05-02 18:53:55,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 18:53:55,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:53:55,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 18:53:55,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 18:53:55,071 INFO L87 Difference]: Start difference. First operand 342 states and 415 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 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 18:53:57,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:53:57,792 INFO L93 Difference]: Finished difference Result 344 states and 417 transitions. [2021-05-02 18:53:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 18:53:57,793 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 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 341 [2021-05-02 18:53:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:53:57,793 INFO L225 Difference]: With dead ends: 344 [2021-05-02 18:53:57,793 INFO L226 Difference]: Without dead ends: 344 [2021-05-02 18:53:57,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 3945.1ms TimeCoverageRelationStatistics Valid=5736, Invalid=9516, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 18:53:57,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-02 18:53:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2021-05-02 18:53:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 339 states have (on average 1.2182890855457227) internal successors, (413), 339 states have internal predecessors, (413), 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 18:53:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 417 transitions. [2021-05-02 18:53:57,796 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 417 transitions. Word has length 341 [2021-05-02 18:53:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:53:57,796 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 417 transitions. [2021-05-02 18:53:57,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 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 18:53:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 417 transitions. [2021-05-02 18:53:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-05-02 18:53:57,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:53:57,798 INFO L523 BasicCegarLoop]: trace histogram [113, 60, 53, 53, 33, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:53:57,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:53:57,999 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:53:57,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:53:57,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2019545729, now seen corresponding path program 59 times [2021-05-02 18:53:57,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:53:57,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558706866] [2021-05-02 18:53:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:53:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:59,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:53:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:53:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 15525 backedges. 6405 proven. 3660 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2021-05-02 18:53:59,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:53:59,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558706866] [2021-05-02 18:53:59,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558706866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:53:59,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878502745] [2021-05-02 18:53:59,467 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:53:59,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 75 check-sat command(s) [2021-05-02 18:53:59,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:53:59,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 18:53:59,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:53:59,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:59,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:59,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:59,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:59,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:59,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:59,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:59,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:59,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:59,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:59,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:53:59,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:00,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:01,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15525 backedges. 9190 proven. 2421 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2021-05-02 18:54:02,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878502745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:02,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:02,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 39] total 101 [2021-05-02 18:54:02,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203950484] [2021-05-02 18:54:02,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 18:54:02,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:02,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 18:54:02,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 18:54:02,116 INFO L87 Difference]: Start difference. First operand 344 states and 417 transitions. Second operand has 101 states, 101 states have (on average 2.772277227722772) internal successors, (280), 100 states have internal predecessors, (280), 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 18:54:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:08,813 INFO L93 Difference]: Finished difference Result 362 states and 439 transitions. [2021-05-02 18:54:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-02 18:54:08,814 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.772277227722772) internal successors, (280), 100 states have internal predecessors, (280), 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 343 [2021-05-02 18:54:08,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:08,814 INFO L225 Difference]: With dead ends: 362 [2021-05-02 18:54:08,815 INFO L226 Difference]: Without dead ends: 362 [2021-05-02 18:54:08,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4813 ImplicationChecksByTransitivity, 9540.1ms TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2021-05-02 18:54:08,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-02 18:54:08,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2021-05-02 18:54:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 357 states have (on average 1.218487394957983) internal successors, (435), 357 states have internal predecessors, (435), 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 18:54:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 439 transitions. [2021-05-02 18:54:08,818 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 439 transitions. Word has length 343 [2021-05-02 18:54:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:08,818 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 439 transitions. [2021-05-02 18:54:08,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.772277227722772) internal successors, (280), 100 states have internal predecessors, (280), 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 18:54:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 439 transitions. [2021-05-02 18:54:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-05-02 18:54:08,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:08,820 INFO L523 BasicCegarLoop]: trace histogram [118, 61, 57, 57, 37, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:09,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-02 18:54:09,033 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:09,033 INFO L82 PathProgramCache]: Analyzing trace with hash -757276931, now seen corresponding path program 60 times [2021-05-02 18:54:09,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:09,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879025645] [2021-05-02 18:54:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:10,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17116 backedges. 7006 proven. 3782 refuted. 0 times theorem prover too weak. 6328 trivial. 0 not checked. [2021-05-02 18:54:10,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:10,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879025645] [2021-05-02 18:54:10,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879025645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:10,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43935812] [2021-05-02 18:54:10,561 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:10,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2021-05-02 18:54:10,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:54:10,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 18:54:10,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:11,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:11,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:12,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:12,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:12,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:12,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:12,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:12,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:12,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:12,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 17116 backedges. 5514 proven. 800 refuted. 0 times theorem prover too weak. 10802 trivial. 0 not checked. [2021-05-02 18:54:12,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43935812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:12,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:12,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 23] total 86 [2021-05-02 18:54:12,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66098847] [2021-05-02 18:54:12,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 18:54:12,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:12,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 18:54:12,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 18:54:12,284 INFO L87 Difference]: Start difference. First operand 362 states and 439 transitions. Second operand has 86 states, 86 states have (on average 2.627906976744186) internal successors, (226), 85 states have internal predecessors, (226), 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 18:54:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:17,243 INFO L93 Difference]: Finished difference Result 370 states and 451 transitions. [2021-05-02 18:54:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 18:54:17,243 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.627906976744186) internal successors, (226), 85 states have internal predecessors, (226), 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 361 [2021-05-02 18:54:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:17,244 INFO L225 Difference]: With dead ends: 370 [2021-05-02 18:54:17,244 INFO L226 Difference]: Without dead ends: 370 [2021-05-02 18:54:17,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 7007.8ms TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2021-05-02 18:54:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-05-02 18:54:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 368. [2021-05-02 18:54:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 363 states have (on average 1.2203856749311295) internal successors, (443), 363 states have internal predecessors, (443), 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 18:54:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 447 transitions. [2021-05-02 18:54:17,248 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 447 transitions. Word has length 361 [2021-05-02 18:54:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:17,248 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 447 transitions. [2021-05-02 18:54:17,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.627906976744186) internal successors, (226), 85 states have internal predecessors, (226), 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 18:54:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 447 transitions. [2021-05-02 18:54:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-05-02 18:54:17,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:17,249 INFO L523 BasicCegarLoop]: trace histogram [120, 62, 58, 58, 37, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:17,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:17,450 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:17,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:17,450 INFO L82 PathProgramCache]: Analyzing trace with hash 297753364, now seen corresponding path program 61 times [2021-05-02 18:54:17,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:17,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354764155] [2021-05-02 18:54:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:19,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 17706 backedges. 7245 proven. 3906 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-02 18:54:19,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:19,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354764155] [2021-05-02 18:54:19,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354764155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:19,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151345986] [2021-05-02 18:54:19,021 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:19,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-02 18:54:19,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:19,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17706 backedges. 7245 proven. 3906 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-02 18:54:19,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151345986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:19,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:19,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65] total 67 [2021-05-02 18:54:19,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747648390] [2021-05-02 18:54:19,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 18:54:19,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:19,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 18:54:19,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 18:54:19,575 INFO L87 Difference]: Start difference. First operand 368 states and 447 transitions. Second operand has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 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 18:54:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:22,709 INFO L93 Difference]: Finished difference Result 370 states and 449 transitions. [2021-05-02 18:54:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 18:54:22,709 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 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 367 [2021-05-02 18:54:22,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:22,710 INFO L225 Difference]: With dead ends: 370 [2021-05-02 18:54:22,710 INFO L226 Difference]: Without dead ends: 370 [2021-05-02 18:54:22,711 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 4271.6ms TimeCoverageRelationStatistics Valid=6306, Invalid=10464, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 18:54:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-05-02 18:54:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2021-05-02 18:54:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.2191780821917808) internal successors, (445), 365 states have internal predecessors, (445), 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 18:54:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 449 transitions. [2021-05-02 18:54:22,713 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 449 transitions. Word has length 367 [2021-05-02 18:54:22,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:22,714 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 449 transitions. [2021-05-02 18:54:22,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 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 18:54:22,714 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 449 transitions. [2021-05-02 18:54:22,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-05-02 18:54:22,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:22,715 INFO L523 BasicCegarLoop]: trace histogram [121, 63, 58, 58, 37, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:22,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-02 18:54:22,929 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:22,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:22,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1353457586, now seen corresponding path program 62 times [2021-05-02 18:54:22,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:22,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724967620] [2021-05-02 18:54:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:24,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17947 backedges. 7360 proven. 4032 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-02 18:54:24,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:24,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724967620] [2021-05-02 18:54:24,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724967620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:24,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621487213] [2021-05-02 18:54:24,518 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:24,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:54:24,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:54:24,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-02 18:54:24,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:24,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:24,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17947 backedges. 7360 proven. 4032 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-02 18:54:25,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621487213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:25,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:25,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66] total 68 [2021-05-02 18:54:25,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172657441] [2021-05-02 18:54:25,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 18:54:25,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 18:54:25,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 18:54:25,086 INFO L87 Difference]: Start difference. First operand 370 states and 449 transitions. Second operand has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 states have internal predecessors, (144), 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 18:54:28,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:28,288 INFO L93 Difference]: Finished difference Result 372 states and 451 transitions. [2021-05-02 18:54:28,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 18:54:28,288 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 states have internal predecessors, (144), 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 369 [2021-05-02 18:54:28,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:28,289 INFO L225 Difference]: With dead ends: 372 [2021-05-02 18:54:28,289 INFO L226 Difference]: Without dead ends: 372 [2021-05-02 18:54:28,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2265 ImplicationChecksByTransitivity, 4358.1ms TimeCoverageRelationStatistics Valid=6502, Invalid=10790, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 18:54:28,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-05-02 18:54:28,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2021-05-02 18:54:28,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 367 states have (on average 1.2179836512261581) internal successors, (447), 367 states have internal predecessors, (447), 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 18:54:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 451 transitions. [2021-05-02 18:54:28,292 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 451 transitions. Word has length 369 [2021-05-02 18:54:28,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:28,293 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 451 transitions. [2021-05-02 18:54:28,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 states have internal predecessors, (144), 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 18:54:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 451 transitions. [2021-05-02 18:54:28,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-05-02 18:54:28,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:28,294 INFO L523 BasicCegarLoop]: trace histogram [122, 64, 58, 58, 37, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:28,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:28,501 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:28,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:28,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2022034224, now seen corresponding path program 63 times [2021-05-02 18:54:28,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:28,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672041174] [2021-05-02 18:54:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:30,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18190 backedges. 7475 proven. 4160 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-02 18:54:30,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:30,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672041174] [2021-05-02 18:54:30,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672041174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:30,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288352790] [2021-05-02 18:54:30,183 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:30,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2021-05-02 18:54:30,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:54:30,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 18:54:30,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:30,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:30,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:30,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:30,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:30,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:30,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:30,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:30,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:30,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:30,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:30,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:30,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:30,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:30,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18190 backedges. 5912 proven. 882 refuted. 0 times theorem prover too weak. 11396 trivial. 0 not checked. [2021-05-02 18:54:31,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288352790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:31,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:31,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 24] total 90 [2021-05-02 18:54:31,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301441230] [2021-05-02 18:54:31,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 18:54:31,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:32,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 18:54:32,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 18:54:32,000 INFO L87 Difference]: Start difference. First operand 372 states and 451 transitions. Second operand has 90 states, 90 states have (on average 2.6222222222222222) internal successors, (236), 89 states have internal predecessors, (236), 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 18:54:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:37,438 INFO L93 Difference]: Finished difference Result 380 states and 463 transitions. [2021-05-02 18:54:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 18:54:37,439 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.6222222222222222) internal successors, (236), 89 states have internal predecessors, (236), 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 371 [2021-05-02 18:54:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:37,440 INFO L225 Difference]: With dead ends: 380 [2021-05-02 18:54:37,440 INFO L226 Difference]: Without dead ends: 380 [2021-05-02 18:54:37,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3805 ImplicationChecksByTransitivity, 7762.8ms TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2021-05-02 18:54:37,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-02 18:54:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 378. [2021-05-02 18:54:37,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 373 states have (on average 1.2198391420911527) internal successors, (455), 373 states have internal predecessors, (455), 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 18:54:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 459 transitions. [2021-05-02 18:54:37,443 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 459 transitions. Word has length 371 [2021-05-02 18:54:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:37,443 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 459 transitions. [2021-05-02 18:54:37,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.6222222222222222) internal successors, (236), 89 states have internal predecessors, (236), 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 18:54:37,444 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 459 transitions. [2021-05-02 18:54:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-05-02 18:54:37,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:37,445 INFO L523 BasicCegarLoop]: trace histogram [124, 65, 59, 59, 37, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:37,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-02 18:54:37,645 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:37,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:37,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1836810727, now seen corresponding path program 64 times [2021-05-02 18:54:37,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:37,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443701576] [2021-05-02 18:54:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:39,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18798 backedges. 7722 proven. 4290 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2021-05-02 18:54:39,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:39,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443701576] [2021-05-02 18:54:39,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443701576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:39,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749667536] [2021-05-02 18:54:39,393 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:39,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:54:39,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:54:39,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 18:54:39,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:39,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18798 backedges. 7722 proven. 4290 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2021-05-02 18:54:39,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749667536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:39,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:39,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68] total 70 [2021-05-02 18:54:39,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187902737] [2021-05-02 18:54:39,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 18:54:39,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:39,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 18:54:39,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 18:54:39,997 INFO L87 Difference]: Start difference. First operand 378 states and 459 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 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 18:54:43,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:43,343 INFO L93 Difference]: Finished difference Result 380 states and 461 transitions. [2021-05-02 18:54:43,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 18:54:43,344 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 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 377 [2021-05-02 18:54:43,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:43,345 INFO L225 Difference]: With dead ends: 380 [2021-05-02 18:54:43,345 INFO L226 Difference]: Without dead ends: 380 [2021-05-02 18:54:43,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 4759.8ms TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 18:54:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-02 18:54:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2021-05-02 18:54:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.2186666666666666) internal successors, (457), 375 states have internal predecessors, (457), 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 18:54:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 461 transitions. [2021-05-02 18:54:43,348 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 461 transitions. Word has length 377 [2021-05-02 18:54:43,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:43,348 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 461 transitions. [2021-05-02 18:54:43,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 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 18:54:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 461 transitions. [2021-05-02 18:54:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-05-02 18:54:43,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:43,349 INFO L523 BasicCegarLoop]: trace histogram [125, 66, 59, 59, 37, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:43,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-02 18:54:43,565 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:43,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:43,565 INFO L82 PathProgramCache]: Analyzing trace with hash -211183355, now seen corresponding path program 65 times [2021-05-02 18:54:43,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:43,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897224801] [2021-05-02 18:54:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:45,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 19047 backedges. 7839 proven. 4422 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2021-05-02 18:54:45,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:45,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897224801] [2021-05-02 18:54:45,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897224801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:45,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164423297] [2021-05-02 18:54:45,372 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:45,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 83 check-sat command(s) [2021-05-02 18:54:45,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:54:45,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 18:54:45,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:45,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:45,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:45,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:45,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:45,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:45,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:45,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:45,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:45,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:45,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:45,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:45,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:45,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:45,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:46,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:47,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:48,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:48,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:48,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:48,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:48,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:48,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:48,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:48,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:48,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:48,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:48,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:48,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 19047 backedges. 11250 proven. 3009 refuted. 0 times theorem prover too weak. 4788 trivial. 0 not checked. [2021-05-02 18:54:48,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164423297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:48,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:48,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 43] total 111 [2021-05-02 18:54:48,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947923387] [2021-05-02 18:54:48,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-02 18:54:48,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:48,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-02 18:54:48,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 18:54:48,679 INFO L87 Difference]: Start difference. First operand 380 states and 461 transitions. Second operand has 111 states, 111 states have (on average 2.774774774774775) internal successors, (308), 110 states have internal predecessors, (308), 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 18:54:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:56,772 INFO L93 Difference]: Finished difference Result 398 states and 483 transitions. [2021-05-02 18:54:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-02 18:54:56,773 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.774774774774775) internal successors, (308), 110 states have internal predecessors, (308), 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 379 [2021-05-02 18:54:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:56,774 INFO L225 Difference]: With dead ends: 398 [2021-05-02 18:54:56,774 INFO L226 Difference]: Without dead ends: 398 [2021-05-02 18:54:56,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5844 ImplicationChecksByTransitivity, 11670.0ms TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2021-05-02 18:54:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-05-02 18:54:56,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2021-05-02 18:54:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 393 states have (on average 1.2188295165394403) internal successors, (479), 393 states have internal predecessors, (479), 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 18:54:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 483 transitions. [2021-05-02 18:54:56,778 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 483 transitions. Word has length 379 [2021-05-02 18:54:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:56,778 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 483 transitions. [2021-05-02 18:54:56,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.774774774774775) internal successors, (308), 110 states have internal predecessors, (308), 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 18:54:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 483 transitions. [2021-05-02 18:54:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-05-02 18:54:56,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:56,779 INFO L523 BasicCegarLoop]: trace histogram [130, 67, 63, 63, 41, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:56,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-02 18:54:56,980 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:56,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:56,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1147778173, now seen corresponding path program 66 times [2021-05-02 18:54:56,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:56,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872500648] [2021-05-02 18:54:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:58,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20806 backedges. 8500 proven. 4556 refuted. 0 times theorem prover too weak. 7750 trivial. 0 not checked. [2021-05-02 18:54:58,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:58,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872500648] [2021-05-02 18:54:58,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872500648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:58,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977082322] [2021-05-02 18:54:58,839 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:58,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2021-05-02 18:54:58,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:54:59,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 18:54:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:59,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:59,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20806 backedges. 6682 proven. 968 refuted. 0 times theorem prover too weak. 13156 trivial. 0 not checked. [2021-05-02 18:55:00,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977082322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:00,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:55:00,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 25] total 94 [2021-05-02 18:55:00,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232637816] [2021-05-02 18:55:00,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 18:55:00,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:55:00,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 18:55:00,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 18:55:00,930 INFO L87 Difference]: Start difference. First operand 398 states and 483 transitions. Second operand has 94 states, 94 states have (on average 2.617021276595745) internal successors, (246), 93 states have internal predecessors, (246), 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 18:55:06,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:55:06,948 INFO L93 Difference]: Finished difference Result 406 states and 495 transitions. [2021-05-02 18:55:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 18:55:06,948 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.617021276595745) internal successors, (246), 93 states have internal predecessors, (246), 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 397 [2021-05-02 18:55:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:55:06,949 INFO L225 Difference]: With dead ends: 406 [2021-05-02 18:55:06,949 INFO L226 Difference]: Without dead ends: 406 [2021-05-02 18:55:06,950 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4162 ImplicationChecksByTransitivity, 8568.1ms TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2021-05-02 18:55:06,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-02 18:55:06,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 404. [2021-05-02 18:55:06,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 399 states have (on average 1.2205513784461153) internal successors, (487), 399 states have internal predecessors, (487), 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 18:55:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 491 transitions. [2021-05-02 18:55:06,953 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 491 transitions. Word has length 397 [2021-05-02 18:55:06,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:55:06,953 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 491 transitions. [2021-05-02 18:55:06,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.617021276595745) internal successors, (246), 93 states have internal predecessors, (246), 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 18:55:06,953 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 491 transitions. [2021-05-02 18:55:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-05-02 18:55:06,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:55:06,972 INFO L523 BasicCegarLoop]: trace histogram [132, 68, 64, 64, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:55:07,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:07,188 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:55:07,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:55:07,188 INFO L82 PathProgramCache]: Analyzing trace with hash -371991142, now seen corresponding path program 67 times [2021-05-02 18:55:07,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:55:07,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036223404] [2021-05-02 18:55:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:55:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:09,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:55:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 21456 backedges. 8763 proven. 4692 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-02 18:55:09,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:55:09,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036223404] [2021-05-02 18:55:09,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036223404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:09,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153545336] [2021-05-02 18:55:09,098 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:09,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 18:55:09,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:55:09,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21456 backedges. 8763 proven. 4692 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-02 18:55:09,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153545336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:09,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:55:09,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71] total 73 [2021-05-02 18:55:09,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322422031] [2021-05-02 18:55:09,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 18:55:09,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:55:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 18:55:09,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 18:55:09,734 INFO L87 Difference]: Start difference. First operand 404 states and 491 transitions. Second operand has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 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 18:55:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:55:13,341 INFO L93 Difference]: Finished difference Result 406 states and 493 transitions. [2021-05-02 18:55:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 18:55:13,341 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 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 403 [2021-05-02 18:55:13,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:55:13,342 INFO L225 Difference]: With dead ends: 406 [2021-05-02 18:55:13,342 INFO L226 Difference]: Without dead ends: 406 [2021-05-02 18:55:13,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 5143.9ms TimeCoverageRelationStatistics Valid=7527, Invalid=12495, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 18:55:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-02 18:55:13,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2021-05-02 18:55:13,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 401 states have (on average 1.2194513715710724) internal successors, (489), 401 states have internal predecessors, (489), 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 18:55:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 493 transitions. [2021-05-02 18:55:13,346 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 493 transitions. Word has length 403 [2021-05-02 18:55:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:55:13,346 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 493 transitions. [2021-05-02 18:55:13,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 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 18:55:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 493 transitions. [2021-05-02 18:55:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-05-02 18:55:13,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:55:13,348 INFO L523 BasicCegarLoop]: trace histogram [133, 69, 64, 64, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:55:13,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:13,548 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:55:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:55:13,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1035785416, now seen corresponding path program 68 times [2021-05-02 18:55:13,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:55:13,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774972270] [2021-05-02 18:55:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:55:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:15,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:55:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21721 backedges. 8890 proven. 4830 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-02 18:55:15,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:55:15,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774972270] [2021-05-02 18:55:15,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774972270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:15,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553633241] [2021-05-02 18:55:15,517 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:15,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:55:15,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:55:15,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-02 18:55:15,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:55:15,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:15,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21721 backedges. 8890 proven. 4830 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-02 18:55:16,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553633241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:16,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:55:16,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72] total 74 [2021-05-02 18:55:16,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057482970] [2021-05-02 18:55:16,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 18:55:16,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:55:16,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 18:55:16,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 18:55:16,154 INFO L87 Difference]: Start difference. First operand 406 states and 493 transitions. Second operand has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 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 18:55:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:55:19,814 INFO L93 Difference]: Finished difference Result 408 states and 495 transitions. [2021-05-02 18:55:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 18:55:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 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 405 [2021-05-02 18:55:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:55:19,815 INFO L225 Difference]: With dead ends: 408 [2021-05-02 18:55:19,815 INFO L226 Difference]: Without dead ends: 408 [2021-05-02 18:55:19,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2688 ImplicationChecksByTransitivity, 5314.0ms TimeCoverageRelationStatistics Valid=7741, Invalid=12851, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 18:55:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-02 18:55:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2021-05-02 18:55:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 403 states have (on average 1.218362282878412) internal successors, (491), 403 states have internal predecessors, (491), 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 18:55:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 495 transitions. [2021-05-02 18:55:19,819 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 495 transitions. Word has length 405 [2021-05-02 18:55:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:55:19,819 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 495 transitions. [2021-05-02 18:55:19,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 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 18:55:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 495 transitions. [2021-05-02 18:55:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-05-02 18:55:19,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:55:19,821 INFO L523 BasicCegarLoop]: trace histogram [134, 70, 64, 64, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:55:20,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:20,036 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:55:20,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:55:20,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1008044374, now seen corresponding path program 69 times [2021-05-02 18:55:20,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:55:20,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593412981] [2021-05-02 18:55:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:55:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:22,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:55:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 21988 backedges. 9017 proven. 4970 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-02 18:55:22,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:55:22,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593412981] [2021-05-02 18:55:22,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593412981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:22,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080132736] [2021-05-02 18:55:22,080 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:22,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-05-02 18:55:22,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:55:22,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 18:55:22,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:55:22,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:22,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:22,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:22,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:22,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:22,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:22,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:22,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:22,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:22,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:22,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:22,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:22,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:22,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:23,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:24,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:24,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:24,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:24,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:24,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:24,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21988 backedges. 7120 proven. 1058 refuted. 0 times theorem prover too weak. 13810 trivial. 0 not checked. [2021-05-02 18:55:24,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080132736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:24,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:55:24,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 26] total 98 [2021-05-02 18:55:24,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609339070] [2021-05-02 18:55:24,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 18:55:24,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:55:24,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 18:55:24,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 18:55:24,268 INFO L87 Difference]: Start difference. First operand 408 states and 495 transitions. Second operand has 98 states, 98 states have (on average 2.6122448979591835) internal successors, (256), 97 states have internal predecessors, (256), 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 18:55:30,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:55:30,753 INFO L93 Difference]: Finished difference Result 416 states and 507 transitions. [2021-05-02 18:55:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 18:55:30,754 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.6122448979591835) internal successors, (256), 97 states have internal predecessors, (256), 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 407 [2021-05-02 18:55:30,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:55:30,755 INFO L225 Difference]: With dead ends: 416 [2021-05-02 18:55:30,755 INFO L226 Difference]: Without dead ends: 416 [2021-05-02 18:55:30,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4535 ImplicationChecksByTransitivity, 9312.5ms TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2021-05-02 18:55:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-02 18:55:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2021-05-02 18:55:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 409 states have (on average 1.2200488997555012) internal successors, (499), 409 states have internal predecessors, (499), 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 18:55:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 503 transitions. [2021-05-02 18:55:30,759 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 503 transitions. Word has length 407 [2021-05-02 18:55:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:55:30,759 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 503 transitions. [2021-05-02 18:55:30,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.6122448979591835) internal successors, (256), 97 states have internal predecessors, (256), 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 18:55:30,759 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 503 transitions. [2021-05-02 18:55:30,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2021-05-02 18:55:30,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:55:30,761 INFO L523 BasicCegarLoop]: trace histogram [136, 71, 65, 65, 41, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:55:30,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-02 18:55:30,961 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:55:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:55:30,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1701401491, now seen corresponding path program 70 times [2021-05-02 18:55:30,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:55:30,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063696562] [2021-05-02 18:55:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:55:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:33,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:55:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 22656 backedges. 9288 proven. 5112 refuted. 0 times theorem prover too weak. 8256 trivial. 0 not checked. [2021-05-02 18:55:33,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:55:33,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063696562] [2021-05-02 18:55:33,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063696562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:33,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816937182] [2021-05-02 18:55:33,079 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:33,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:55:33,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:55:33,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-02 18:55:33,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:55:33,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 22656 backedges. 9288 proven. 5112 refuted. 0 times theorem prover too weak. 8256 trivial. 0 not checked. [2021-05-02 18:55:33,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816937182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:33,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:55:33,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74] total 76 [2021-05-02 18:55:33,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093179253] [2021-05-02 18:55:33,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 18:55:33,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:55:33,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 18:55:33,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 18:55:33,763 INFO L87 Difference]: Start difference. First operand 414 states and 503 transitions. Second operand has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 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 18:55:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:55:37,633 INFO L93 Difference]: Finished difference Result 416 states and 505 transitions. [2021-05-02 18:55:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 18:55:37,634 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 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 413 [2021-05-02 18:55:37,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:55:37,635 INFO L225 Difference]: With dead ends: 416 [2021-05-02 18:55:37,635 INFO L226 Difference]: Without dead ends: 416 [2021-05-02 18:55:37,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 5652.8ms TimeCoverageRelationStatistics Valid=8178, Invalid=13578, Unknown=0, NotChecked=0, Total=21756 [2021-05-02 18:55:37,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-02 18:55:37,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2021-05-02 18:55:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 411 states have (on average 1.218978102189781) internal successors, (501), 411 states have internal predecessors, (501), 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 18:55:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 505 transitions. [2021-05-02 18:55:37,639 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 505 transitions. Word has length 413 [2021-05-02 18:55:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:55:37,639 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 505 transitions. [2021-05-02 18:55:37,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 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 18:55:37,639 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 505 transitions. [2021-05-02 18:55:37,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2021-05-02 18:55:37,640 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:55:37,641 INFO L523 BasicCegarLoop]: trace histogram [137, 72, 65, 65, 41, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:55:37,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:37,841 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:55:37,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:55:37,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1557132149, now seen corresponding path program 71 times [2021-05-02 18:55:37,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:55:37,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868104288] [2021-05-02 18:55:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:55:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:40,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:55:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 22929 backedges. 9417 proven. 5256 refuted. 0 times theorem prover too weak. 8256 trivial. 0 not checked. [2021-05-02 18:55:40,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:55:40,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868104288] [2021-05-02 18:55:40,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868104288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:40,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332662990] [2021-05-02 18:55:40,051 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:40,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2021-05-02 18:55:40,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:55:40,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 18:55:40,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:55:40,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:40,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:41,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:42,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:43,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 22929 backedges. 13518 proven. 3661 refuted. 0 times theorem prover too weak. 5750 trivial. 0 not checked. [2021-05-02 18:55:44,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332662990] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:44,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:55:44,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 47] total 121 [2021-05-02 18:55:44,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119239763] [2021-05-02 18:55:44,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2021-05-02 18:55:44,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:55:44,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-05-02 18:55:44,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 18:55:44,110 INFO L87 Difference]: Start difference. First operand 416 states and 505 transitions. Second operand has 121 states, 121 states have (on average 2.7768595041322315) internal successors, (336), 120 states have internal predecessors, (336), 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 18:55:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:55:53,955 INFO L93 Difference]: Finished difference Result 434 states and 527 transitions. [2021-05-02 18:55:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-02 18:55:53,956 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.7768595041322315) internal successors, (336), 120 states have internal predecessors, (336), 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 415 [2021-05-02 18:55:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:55:53,957 INFO L225 Difference]: With dead ends: 434 [2021-05-02 18:55:53,957 INFO L226 Difference]: Without dead ends: 434 [2021-05-02 18:55:53,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6975 ImplicationChecksByTransitivity, 14333.8ms TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2021-05-02 18:55:53,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-05-02 18:55:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2021-05-02 18:55:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 429 states have (on average 1.219114219114219) internal successors, (523), 429 states have internal predecessors, (523), 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 18:55:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 527 transitions. [2021-05-02 18:55:53,962 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 527 transitions. Word has length 415 [2021-05-02 18:55:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:55:53,962 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 527 transitions. [2021-05-02 18:55:53,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 121 states, 121 states have (on average 2.7768595041322315) internal successors, (336), 120 states have internal predecessors, (336), 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 18:55:53,962 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 527 transitions. [2021-05-02 18:55:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-05-02 18:55:53,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:55:53,964 INFO L523 BasicCegarLoop]: trace histogram [142, 73, 69, 69, 45, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:55:54,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:54,165 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:55:54,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:55:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1231568905, now seen corresponding path program 72 times [2021-05-02 18:55:54,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:55:54,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956187412] [2021-05-02 18:55:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:55:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:56,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:55:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 24856 backedges. 10138 proven. 5402 refuted. 0 times theorem prover too weak. 9316 trivial. 0 not checked. [2021-05-02 18:55:56,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:55:56,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956187412] [2021-05-02 18:55:56,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956187412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:56,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290370121] [2021-05-02 18:55:56,423 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:56,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 99 check-sat command(s) [2021-05-02 18:55:56,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:55:56,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 18:55:56,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:55:57,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:57,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24856 backedges. 7962 proven. 1152 refuted. 0 times theorem prover too weak. 15742 trivial. 0 not checked. [2021-05-02 18:55:58,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290370121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:58,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:55:58,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 27] total 102 [2021-05-02 18:55:58,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121340235] [2021-05-02 18:55:58,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 18:55:58,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:55:58,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 18:55:58,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 18:55:58,912 INFO L87 Difference]: Start difference. First operand 434 states and 527 transitions. Second operand has 102 states, 102 states have (on average 2.607843137254902) internal successors, (266), 101 states have internal predecessors, (266), 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 18:56:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:56:06,000 INFO L93 Difference]: Finished difference Result 442 states and 539 transitions. [2021-05-02 18:56:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 18:56:06,000 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.607843137254902) internal successors, (266), 101 states have internal predecessors, (266), 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 433 [2021-05-02 18:56:06,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:56:06,001 INFO L225 Difference]: With dead ends: 442 [2021-05-02 18:56:06,001 INFO L226 Difference]: Without dead ends: 442 [2021-05-02 18:56:06,003 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4924 ImplicationChecksByTransitivity, 10244.3ms TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2021-05-02 18:56:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-05-02 18:56:06,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2021-05-02 18:56:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.2206896551724138) internal successors, (531), 435 states have internal predecessors, (531), 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 18:56:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 535 transitions. [2021-05-02 18:56:06,006 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 535 transitions. Word has length 433 [2021-05-02 18:56:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:56:06,006 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 535 transitions. [2021-05-02 18:56:06,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.607843137254902) internal successors, (266), 101 states have internal predecessors, (266), 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 18:56:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 535 transitions. [2021-05-02 18:56:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-05-02 18:56:06,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:56:06,008 INFO L523 BasicCegarLoop]: trace histogram [144, 74, 70, 70, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:56:06,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:56:06,208 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:56:06,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:56:06,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1418487840, now seen corresponding path program 73 times [2021-05-02 18:56:06,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:56:06,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552277199] [2021-05-02 18:56:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:56:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:56:08,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:56:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:56:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 25566 backedges. 10425 proven. 5550 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-02 18:56:08,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:56:08,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552277199] [2021-05-02 18:56:08,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552277199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:56:08,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156860438] [2021-05-02 18:56:08,536 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:56:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:56:08,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-02 18:56:08,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:56:08,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:08,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25566 backedges. 10425 proven. 5550 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-02 18:56:09,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156860438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:56:09,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:56:09,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77] total 79 [2021-05-02 18:56:09,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411034918] [2021-05-02 18:56:09,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 18:56:09,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:56:09,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 18:56:09,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 18:56:09,266 INFO L87 Difference]: Start difference. First operand 440 states and 535 transitions. Second operand has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 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 18:56:13,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:56:13,521 INFO L93 Difference]: Finished difference Result 442 states and 537 transitions. [2021-05-02 18:56:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 18:56:13,521 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 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 439 [2021-05-02 18:56:13,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:56:13,522 INFO L225 Difference]: With dead ends: 442 [2021-05-02 18:56:13,522 INFO L226 Difference]: Without dead ends: 442 [2021-05-02 18:56:13,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 6196.8ms TimeCoverageRelationStatistics Valid=8856, Invalid=14706, Unknown=0, NotChecked=0, Total=23562 [2021-05-02 18:56:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-05-02 18:56:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-05-02 18:56:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 437 states have (on average 1.2196796338672768) internal successors, (533), 437 states have internal predecessors, (533), 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 18:56:13,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 537 transitions. [2021-05-02 18:56:13,526 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 537 transitions. Word has length 439 [2021-05-02 18:56:13,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:56:13,526 INFO L480 AbstractCegarLoop]: Abstraction has 442 states and 537 transitions. [2021-05-02 18:56:13,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 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 18:56:13,527 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 537 transitions. [2021-05-02 18:56:13,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-05-02 18:56:13,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:56:13,528 INFO L523 BasicCegarLoop]: trace histogram [145, 75, 70, 70, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:56:13,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-02 18:56:13,729 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:56:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:56:13,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2108538558, now seen corresponding path program 74 times [2021-05-02 18:56:13,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:56:13,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678057744] [2021-05-02 18:56:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:56:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:56:16,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:56:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:56:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25855 backedges. 10564 proven. 5700 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-02 18:56:16,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:56:16,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678057744] [2021-05-02 18:56:16,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678057744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:56:16,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396288693] [2021-05-02 18:56:16,122 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:56:16,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:56:16,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:56:16,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-02 18:56:16,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:56:16,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25855 backedges. 10564 proven. 5700 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-02 18:56:16,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396288693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:56:16,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:56:16,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 80 [2021-05-02 18:56:16,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439812350] [2021-05-02 18:56:16,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 18:56:16,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:56:16,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 18:56:16,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 18:56:16,879 INFO L87 Difference]: Start difference. First operand 442 states and 537 transitions. Second operand has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 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 18:56:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:56:21,205 INFO L93 Difference]: Finished difference Result 444 states and 539 transitions. [2021-05-02 18:56:21,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 18:56:21,205 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 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 441 [2021-05-02 18:56:21,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:56:21,206 INFO L225 Difference]: With dead ends: 444 [2021-05-02 18:56:21,207 INFO L226 Difference]: Without dead ends: 444 [2021-05-02 18:56:21,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 6329.4ms TimeCoverageRelationStatistics Valid=9088, Invalid=15092, Unknown=0, NotChecked=0, Total=24180 [2021-05-02 18:56:21,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-05-02 18:56:21,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2021-05-02 18:56:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 439 states have (on average 1.2186788154897494) internal successors, (535), 439 states have internal predecessors, (535), 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 18:56:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 539 transitions. [2021-05-02 18:56:21,210 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 539 transitions. Word has length 441 [2021-05-02 18:56:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:56:21,210 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 539 transitions. [2021-05-02 18:56:21,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 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 18:56:21,211 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 539 transitions. [2021-05-02 18:56:21,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-05-02 18:56:21,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:56:21,212 INFO L523 BasicCegarLoop]: trace histogram [146, 76, 70, 70, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:56:21,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:56:21,428 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:56:21,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:56:21,428 INFO L82 PathProgramCache]: Analyzing trace with hash -472652324, now seen corresponding path program 75 times [2021-05-02 18:56:21,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:56:21,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764182791] [2021-05-02 18:56:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:56:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:56:23,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:56:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:56:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 26146 backedges. 10703 proven. 5852 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-02 18:56:23,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:56:23,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764182791] [2021-05-02 18:56:23,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764182791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:56:23,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552682051] [2021-05-02 18:56:23,919 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:56:24,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-05-02 18:56:24,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:56:24,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 18:56:24,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:56:24,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:24,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:25,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:26,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:26,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:26,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:26,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:26,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:26,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:26,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:26,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:26,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:26,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:26,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:26,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 26146 backedges. 8440 proven. 1250 refuted. 0 times theorem prover too weak. 16456 trivial. 0 not checked. [2021-05-02 18:56:26,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552682051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:56:26,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:56:26,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 28] total 106 [2021-05-02 18:56:26,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803622977] [2021-05-02 18:56:26,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 18:56:26,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:56:26,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 18:56:26,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 18:56:26,533 INFO L87 Difference]: Start difference. First operand 444 states and 539 transitions. Second operand has 106 states, 106 states have (on average 2.6037735849056602) internal successors, (276), 105 states have internal predecessors, (276), 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 18:56:34,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:56:34,124 INFO L93 Difference]: Finished difference Result 452 states and 551 transitions. [2021-05-02 18:56:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-02 18:56:34,125 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.6037735849056602) internal successors, (276), 105 states have internal predecessors, (276), 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 443 [2021-05-02 18:56:34,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:56:34,126 INFO L225 Difference]: With dead ends: 452 [2021-05-02 18:56:34,126 INFO L226 Difference]: Without dead ends: 452 [2021-05-02 18:56:34,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5329 ImplicationChecksByTransitivity, 11099.0ms TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2021-05-02 18:56:34,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-02 18:56:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 450. [2021-05-02 18:56:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 445 states have (on average 1.2202247191011235) internal successors, (543), 445 states have internal predecessors, (543), 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 18:56:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 547 transitions. [2021-05-02 18:56:34,130 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 547 transitions. Word has length 443 [2021-05-02 18:56:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:56:34,130 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 547 transitions. [2021-05-02 18:56:34,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.6037735849056602) internal successors, (276), 105 states have internal predecessors, (276), 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 18:56:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 547 transitions. [2021-05-02 18:56:34,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-05-02 18:56:34,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:56:34,132 INFO L523 BasicCegarLoop]: trace histogram [148, 77, 71, 71, 45, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:56:34,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-02 18:56:34,333 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:56:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:56:34,333 INFO L82 PathProgramCache]: Analyzing trace with hash 834690803, now seen corresponding path program 76 times [2021-05-02 18:56:34,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:56:34,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114914960] [2021-05-02 18:56:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:56:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:56:36,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:56:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:56:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 26874 backedges. 10998 proven. 6006 refuted. 0 times theorem prover too weak. 9870 trivial. 0 not checked. [2021-05-02 18:56:36,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:56:36,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114914960] [2021-05-02 18:56:36,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114914960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:56:36,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880630901] [2021-05-02 18:56:36,845 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:56:36,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:56:36,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:56:36,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 79 conjunts are in the unsatisfiable core [2021-05-02 18:56:36,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:56:36,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:36,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:36,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:36,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:36,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:36,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:36,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:36,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:36,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:36,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:36,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:36,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 26874 backedges. 10998 proven. 6006 refuted. 0 times theorem prover too weak. 9870 trivial. 0 not checked. [2021-05-02 18:56:37,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880630901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:56:37,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:56:37,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80] total 82 [2021-05-02 18:56:37,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491948434] [2021-05-02 18:56:37,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 18:56:37,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:56:37,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 18:56:37,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 18:56:37,603 INFO L87 Difference]: Start difference. First operand 450 states and 547 transitions. Second operand has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 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 18:56:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:56:42,181 INFO L93 Difference]: Finished difference Result 452 states and 549 transitions. [2021-05-02 18:56:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 18:56:42,182 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 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 449 [2021-05-02 18:56:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:56:42,183 INFO L225 Difference]: With dead ends: 452 [2021-05-02 18:56:42,183 INFO L226 Difference]: Without dead ends: 452 [2021-05-02 18:56:42,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 6668.0ms TimeCoverageRelationStatistics Valid=9561, Invalid=15879, Unknown=0, NotChecked=0, Total=25440 [2021-05-02 18:56:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-02 18:56:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2021-05-02 18:56:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 447 states have (on average 1.2192393736017897) internal successors, (545), 447 states have internal predecessors, (545), 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 18:56:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 549 transitions. [2021-05-02 18:56:42,187 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 549 transitions. Word has length 449 [2021-05-02 18:56:42,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:56:42,187 INFO L480 AbstractCegarLoop]: Abstraction has 452 states and 549 transitions. [2021-05-02 18:56:42,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 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 18:56:42,187 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 549 transitions. [2021-05-02 18:56:42,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-05-02 18:56:42,188 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:56:42,189 INFO L523 BasicCegarLoop]: trace histogram [149, 78, 71, 71, 45, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:56:42,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:56:42,389 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:56:42,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:56:42,389 INFO L82 PathProgramCache]: Analyzing trace with hash -556496879, now seen corresponding path program 77 times [2021-05-02 18:56:42,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:56:42,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646369534] [2021-05-02 18:56:42,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:56:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:56:44,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:56:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:56:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 27171 backedges. 11139 proven. 6162 refuted. 0 times theorem prover too weak. 9870 trivial. 0 not checked. [2021-05-02 18:56:44,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:56:44,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646369534] [2021-05-02 18:56:44,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646369534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:56:44,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529676046] [2021-05-02 18:56:44,978 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:56:45,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 99 check-sat command(s) [2021-05-02 18:56:45,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:56:45,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 18:56:45,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:56:45,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:45,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:46,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:47,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:48,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:49,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:49,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:49,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:49,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:49,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:49,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:49,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:49,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:49,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:49,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:49,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:49,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:56:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 27171 backedges. 15994 proven. 4377 refuted. 0 times theorem prover too weak. 6800 trivial. 0 not checked. [2021-05-02 18:56:49,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529676046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:56:49,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:56:49,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 51] total 131 [2021-05-02 18:56:49,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153237412] [2021-05-02 18:56:49,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2021-05-02 18:56:49,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:56:49,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-05-02 18:56:49,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 18:56:49,816 INFO L87 Difference]: Start difference. First operand 452 states and 549 transitions. Second operand has 131 states, 131 states have (on average 2.7786259541984735) internal successors, (364), 130 states have internal predecessors, (364), 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 18:57:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:57:01,368 INFO L93 Difference]: Finished difference Result 470 states and 571 transitions. [2021-05-02 18:57:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-02 18:57:01,369 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.7786259541984735) internal successors, (364), 130 states have internal predecessors, (364), 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 451 [2021-05-02 18:57:01,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:57:01,370 INFO L225 Difference]: With dead ends: 470 [2021-05-02 18:57:01,370 INFO L226 Difference]: Without dead ends: 470 [2021-05-02 18:57:01,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8206 ImplicationChecksByTransitivity, 16895.7ms TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2021-05-02 18:57:01,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-02 18:57:01,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2021-05-02 18:57:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 1.2193548387096773) internal successors, (567), 465 states have internal predecessors, (567), 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 18:57:01,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 571 transitions. [2021-05-02 18:57:01,375 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 571 transitions. Word has length 451 [2021-05-02 18:57:01,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:57:01,375 INFO L480 AbstractCegarLoop]: Abstraction has 470 states and 571 transitions. [2021-05-02 18:57:01,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 131 states, 131 states have (on average 2.7786259541984735) internal successors, (364), 130 states have internal predecessors, (364), 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 18:57:01,375 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 571 transitions. [2021-05-02 18:57:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-05-02 18:57:01,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:57:01,377 INFO L523 BasicCegarLoop]: trace histogram [154, 79, 75, 75, 49, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:57:01,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:57:01,578 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:57:01,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:57:01,578 INFO L82 PathProgramCache]: Analyzing trace with hash 611564687, now seen corresponding path program 78 times [2021-05-02 18:57:01,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:57:01,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598924940] [2021-05-02 18:57:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:57:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:57:04,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:57:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:57:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 29266 backedges. 11920 proven. 6320 refuted. 0 times theorem prover too weak. 11026 trivial. 0 not checked. [2021-05-02 18:57:04,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:57:04,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598924940] [2021-05-02 18:57:04,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598924940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:57:04,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855739333] [2021-05-02 18:57:04,300 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:57:04,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 107 check-sat command(s) [2021-05-02 18:57:04,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:57:04,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 18:57:04,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:57:05,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:05,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:06,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:07,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:07,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:07,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:07,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 29266 backedges. 9354 proven. 1352 refuted. 0 times theorem prover too weak. 18560 trivial. 0 not checked. [2021-05-02 18:57:07,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855739333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:57:07,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:57:07,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 29] total 110 [2021-05-02 18:57:07,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760453623] [2021-05-02 18:57:07,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-02 18:57:07,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:57:07,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-02 18:57:07,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 18:57:07,245 INFO L87 Difference]: Start difference. First operand 470 states and 571 transitions. Second operand has 110 states, 110 states have (on average 2.6) internal successors, (286), 109 states have internal predecessors, (286), 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 18:57:15,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:57:15,559 INFO L93 Difference]: Finished difference Result 478 states and 583 transitions. [2021-05-02 18:57:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 18:57:15,559 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.6) internal successors, (286), 109 states have internal predecessors, (286), 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 469 [2021-05-02 18:57:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:57:15,560 INFO L225 Difference]: With dead ends: 478 [2021-05-02 18:57:15,560 INFO L226 Difference]: Without dead ends: 478 [2021-05-02 18:57:15,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5750 ImplicationChecksByTransitivity, 12224.9ms TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2021-05-02 18:57:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-05-02 18:57:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 476. [2021-05-02 18:57:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 471 states have (on average 1.2208067940552016) internal successors, (575), 471 states have internal predecessors, (575), 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 18:57:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 579 transitions. [2021-05-02 18:57:15,565 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 579 transitions. Word has length 469 [2021-05-02 18:57:15,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:57:15,565 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 579 transitions. [2021-05-02 18:57:15,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.6) internal successors, (286), 109 states have internal predecessors, (286), 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 18:57:15,565 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 579 transitions. [2021-05-02 18:57:15,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-05-02 18:57:15,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:57:15,567 INFO L523 BasicCegarLoop]: trace histogram [156, 80, 76, 76, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:57:15,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:57:15,783 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:57:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:57:15,783 INFO L82 PathProgramCache]: Analyzing trace with hash -808846682, now seen corresponding path program 79 times [2021-05-02 18:57:15,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:57:15,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349106037] [2021-05-02 18:57:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:57:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:57:18,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:57:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:57:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30036 backedges. 12231 proven. 6480 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-02 18:57:18,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:57:18,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349106037] [2021-05-02 18:57:18,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349106037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:57:18,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883010683] [2021-05-02 18:57:18,718 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:57:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:57:18,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 941 conjuncts, 82 conjunts are in the unsatisfiable core [2021-05-02 18:57:18,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:57:18,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:18,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30036 backedges. 12231 proven. 6480 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-02 18:57:19,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883010683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:57:19,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:57:19,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83] total 85 [2021-05-02 18:57:19,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732808055] [2021-05-02 18:57:19,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 18:57:19,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:57:19,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 18:57:19,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 18:57:19,609 INFO L87 Difference]: Start difference. First operand 476 states and 579 transitions. Second operand has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 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 18:57:24,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:57:24,897 INFO L93 Difference]: Finished difference Result 478 states and 581 transitions. [2021-05-02 18:57:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 18:57:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 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 475 [2021-05-02 18:57:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:57:24,899 INFO L225 Difference]: With dead ends: 478 [2021-05-02 18:57:24,899 INFO L226 Difference]: Without dead ends: 478 [2021-05-02 18:57:24,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3557 ImplicationChecksByTransitivity, 7747.7ms TimeCoverageRelationStatistics Valid=10293, Invalid=17097, Unknown=0, NotChecked=0, Total=27390 [2021-05-02 18:57:24,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-05-02 18:57:24,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2021-05-02 18:57:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 473 states have (on average 1.2198731501057083) internal successors, (577), 473 states have internal predecessors, (577), 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 18:57:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 581 transitions. [2021-05-02 18:57:24,903 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 581 transitions. Word has length 475 [2021-05-02 18:57:24,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:57:24,903 INFO L480 AbstractCegarLoop]: Abstraction has 478 states and 581 transitions. [2021-05-02 18:57:24,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 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 18:57:24,903 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 581 transitions. [2021-05-02 18:57:24,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-05-02 18:57:24,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:57:24,905 INFO L523 BasicCegarLoop]: trace histogram [157, 81, 76, 76, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:57:25,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:57:25,105 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:57:25,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:57:25,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1057806916, now seen corresponding path program 80 times [2021-05-02 18:57:25,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:57:25,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367737135] [2021-05-02 18:57:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:57:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:57:27,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:57:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:57:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 30349 backedges. 12382 proven. 6642 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-02 18:57:27,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:57:27,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367737135] [2021-05-02 18:57:27,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367737135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:57:27,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649326895] [2021-05-02 18:57:27,908 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:57:28,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:57:28,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:57:28,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-02 18:57:28,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:57:28,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 30349 backedges. 12382 proven. 6642 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-02 18:57:28,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649326895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:57:28,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:57:28,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84] total 86 [2021-05-02 18:57:28,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964213757] [2021-05-02 18:57:28,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 18:57:28,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:57:28,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 18:57:28,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 18:57:28,753 INFO L87 Difference]: Start difference. First operand 478 states and 581 transitions. Second operand has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 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 18:57:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:57:33,865 INFO L93 Difference]: Finished difference Result 480 states and 583 transitions. [2021-05-02 18:57:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 18:57:33,865 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 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 477 [2021-05-02 18:57:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:57:33,867 INFO L225 Difference]: With dead ends: 480 [2021-05-02 18:57:33,867 INFO L226 Difference]: Without dead ends: 480 [2021-05-02 18:57:33,867 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3642 ImplicationChecksByTransitivity, 7420.6ms TimeCoverageRelationStatistics Valid=10543, Invalid=17513, Unknown=0, NotChecked=0, Total=28056 [2021-05-02 18:57:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-05-02 18:57:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 480. [2021-05-02 18:57:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 475 states have (on average 1.2189473684210526) internal successors, (579), 475 states have internal predecessors, (579), 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 18:57:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 583 transitions. [2021-05-02 18:57:33,871 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 583 transitions. Word has length 477 [2021-05-02 18:57:33,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:57:33,871 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 583 transitions. [2021-05-02 18:57:33,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 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 18:57:33,871 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 583 transitions. [2021-05-02 18:57:33,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-05-02 18:57:33,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:57:33,873 INFO L523 BasicCegarLoop]: trace histogram [158, 82, 76, 76, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:57:34,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:57:34,073 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:57:34,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:57:34,074 INFO L82 PathProgramCache]: Analyzing trace with hash -384415134, now seen corresponding path program 81 times [2021-05-02 18:57:34,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:57:34,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791315715] [2021-05-02 18:57:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:57:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:57:36,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:57:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:57:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30664 backedges. 12533 proven. 6806 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-02 18:57:36,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:57:36,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791315715] [2021-05-02 18:57:36,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791315715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:57:36,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340941564] [2021-05-02 18:57:36,953 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:57:37,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 56 check-sat command(s) [2021-05-02 18:57:37,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:57:37,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 18:57:37,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:57:37,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:37,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:37,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:37,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:37,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:37,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:37,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:37,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:37,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:37,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:37,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:37,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:38,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30664 backedges. 9872 proven. 1458 refuted. 0 times theorem prover too weak. 19334 trivial. 0 not checked. [2021-05-02 18:57:39,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340941564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:57:39,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:57:39,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 30] total 114 [2021-05-02 18:57:39,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071989988] [2021-05-02 18:57:39,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 18:57:39,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:57:39,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 18:57:39,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 18:57:39,993 INFO L87 Difference]: Start difference. First operand 480 states and 583 transitions. Second operand has 114 states, 114 states have (on average 2.5964912280701755) internal successors, (296), 113 states have internal predecessors, (296), 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 18:57:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:57:49,338 INFO L93 Difference]: Finished difference Result 488 states and 595 transitions. [2021-05-02 18:57:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-02 18:57:49,339 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.5964912280701755) internal successors, (296), 113 states have internal predecessors, (296), 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 479 [2021-05-02 18:57:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:57:49,340 INFO L225 Difference]: With dead ends: 488 [2021-05-02 18:57:49,340 INFO L226 Difference]: Without dead ends: 488 [2021-05-02 18:57:49,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6187 ImplicationChecksByTransitivity, 13381.6ms TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2021-05-02 18:57:49,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-05-02 18:57:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 486. [2021-05-02 18:57:49,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 481 states have (on average 1.2203742203742203) internal successors, (587), 481 states have internal predecessors, (587), 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 18:57:49,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 591 transitions. [2021-05-02 18:57:49,347 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 591 transitions. Word has length 479 [2021-05-02 18:57:49,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:57:49,347 INFO L480 AbstractCegarLoop]: Abstraction has 486 states and 591 transitions. [2021-05-02 18:57:49,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.5964912280701755) internal successors, (296), 113 states have internal predecessors, (296), 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 18:57:49,347 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 591 transitions. [2021-05-02 18:57:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-05-02 18:57:49,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:57:49,350 INFO L523 BasicCegarLoop]: trace histogram [160, 83, 77, 77, 49, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:57:49,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:57:49,553 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:57:49,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:57:49,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2095474311, now seen corresponding path program 82 times [2021-05-02 18:57:49,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:57:49,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409838585] [2021-05-02 18:57:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:57:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:57:52,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:57:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:57:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 31452 backedges. 12852 proven. 6972 refuted. 0 times theorem prover too weak. 11628 trivial. 0 not checked. [2021-05-02 18:57:52,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:57:52,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409838585] [2021-05-02 18:57:52,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409838585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:57:52,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118817946] [2021-05-02 18:57:52,670 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:57:52,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:57:52,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:57:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 18:57:52,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:57:52,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:52,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:57:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 31452 backedges. 12852 proven. 6972 refuted. 0 times theorem prover too weak. 11628 trivial. 0 not checked. [2021-05-02 18:57:53,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118817946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:57:53,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:57:53,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 88 [2021-05-02 18:57:53,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767711711] [2021-05-02 18:57:53,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 18:57:53,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:57:53,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 18:57:53,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 18:57:53,536 INFO L87 Difference]: Start difference. First operand 486 states and 591 transitions. Second operand has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 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 18:57:58,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:57:58,789 INFO L93 Difference]: Finished difference Result 488 states and 593 transitions. [2021-05-02 18:57:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 18:57:58,789 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 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 485 [2021-05-02 18:57:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:57:58,790 INFO L225 Difference]: With dead ends: 488 [2021-05-02 18:57:58,791 INFO L226 Difference]: Without dead ends: 488 [2021-05-02 18:57:58,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 7938.4ms TimeCoverageRelationStatistics Valid=11052, Invalid=18360, Unknown=0, NotChecked=0, Total=29412 [2021-05-02 18:57:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-05-02 18:57:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2021-05-02 18:57:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 483 states have (on average 1.2194616977225672) internal successors, (589), 483 states have internal predecessors, (589), 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 18:57:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 593 transitions. [2021-05-02 18:57:58,795 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 593 transitions. Word has length 485 [2021-05-02 18:57:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:57:58,795 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 593 transitions. [2021-05-02 18:57:58,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 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 18:57:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 593 transitions. [2021-05-02 18:57:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-05-02 18:57:58,797 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:57:58,797 INFO L523 BasicCegarLoop]: trace histogram [161, 84, 77, 77, 49, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:57:58,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:57:58,997 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:57:58,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:57:58,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1689783191, now seen corresponding path program 83 times [2021-05-02 18:57:58,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:57:58,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145433444] [2021-05-02 18:57:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:57:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:58:02,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:58:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:58:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 31773 backedges. 13005 proven. 7140 refuted. 0 times theorem prover too weak. 11628 trivial. 0 not checked. [2021-05-02 18:58:02,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:58:02,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145433444] [2021-05-02 18:58:02,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145433444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:58:02,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517264391] [2021-05-02 18:58:02,116 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:58:02,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 107 check-sat command(s) [2021-05-02 18:58:02,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:58:02,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 18:58:02,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:58:02,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:02,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:02,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:02,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:02,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:02,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:02,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:02,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:02,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:02,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:02,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:02,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:02,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:02,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:03,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:04,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:05,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:06,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:07,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:07,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:07,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:07,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:07,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:07,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:07,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:07,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:07,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:07,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:07,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:07,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 31773 backedges. 18678 proven. 5157 refuted. 0 times theorem prover too weak. 7938 trivial. 0 not checked. [2021-05-02 18:58:07,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517264391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:58:07,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:58:07,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 55] total 141 [2021-05-02 18:58:07,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140509404] [2021-05-02 18:58:07,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 141 states [2021-05-02 18:58:07,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:58:07,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-05-02 18:58:07,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-02 18:58:07,919 INFO L87 Difference]: Start difference. First operand 488 states and 593 transitions. Second operand has 141 states, 141 states have (on average 2.780141843971631) internal successors, (392), 140 states have internal predecessors, (392), 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 18:58:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:58:21,680 INFO L93 Difference]: Finished difference Result 506 states and 615 transitions. [2021-05-02 18:58:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-05-02 18:58:21,681 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.780141843971631) internal successors, (392), 140 states have internal predecessors, (392), 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 487 [2021-05-02 18:58:21,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:58:21,682 INFO L225 Difference]: With dead ends: 506 [2021-05-02 18:58:21,682 INFO L226 Difference]: Without dead ends: 506 [2021-05-02 18:58:21,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9537 ImplicationChecksByTransitivity, 20216.9ms TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2021-05-02 18:58:21,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-05-02 18:58:21,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2021-05-02 18:58:21,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 501 states have (on average 1.219560878243513) internal successors, (611), 501 states have internal predecessors, (611), 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 18:58:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 615 transitions. [2021-05-02 18:58:21,688 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 615 transitions. Word has length 487 [2021-05-02 18:58:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:58:21,688 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 615 transitions. [2021-05-02 18:58:21,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 141 states, 141 states have (on average 2.780141843971631) internal successors, (392), 140 states have internal predecessors, (392), 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 18:58:21,688 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 615 transitions. [2021-05-02 18:58:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-05-02 18:58:21,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:58:21,690 INFO L523 BasicCegarLoop]: trace histogram [166, 85, 81, 81, 53, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:58:21,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-02 18:58:21,891 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:58:21,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:58:21,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1264173333, now seen corresponding path program 84 times [2021-05-02 18:58:21,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:58:21,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202491632] [2021-05-02 18:58:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:58:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:58:25,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:58:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:58:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 34036 backedges. 13846 proven. 7310 refuted. 0 times theorem prover too weak. 12880 trivial. 0 not checked. [2021-05-02 18:58:25,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:58:25,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202491632] [2021-05-02 18:58:25,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202491632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:58:25,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863719166] [2021-05-02 18:58:25,147 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:58:25,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2021-05-02 18:58:25,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:58:25,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 18:58:25,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:58:25,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:25,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:26,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:27,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:28,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:28,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:28,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:28,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:28,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:28,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:28,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:28,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:28,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:28,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:28,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:28,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 34036 backedges. 10858 proven. 1568 refuted. 0 times theorem prover too weak. 21610 trivial. 0 not checked. [2021-05-02 18:58:28,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863719166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:58:28,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:58:28,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 31] total 118 [2021-05-02 18:58:28,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067914650] [2021-05-02 18:58:28,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-02 18:58:28,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:58:28,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-02 18:58:28,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 18:58:28,655 INFO L87 Difference]: Start difference. First operand 506 states and 615 transitions. Second operand has 118 states, 118 states have (on average 2.593220338983051) internal successors, (306), 117 states have internal predecessors, (306), 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 18:58:38,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:58:38,517 INFO L93 Difference]: Finished difference Result 514 states and 627 transitions. [2021-05-02 18:58:38,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-02 18:58:38,517 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.593220338983051) internal successors, (306), 117 states have internal predecessors, (306), 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 505 [2021-05-02 18:58:38,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:58:38,518 INFO L225 Difference]: With dead ends: 514 [2021-05-02 18:58:38,518 INFO L226 Difference]: Without dead ends: 514 [2021-05-02 18:58:38,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6640 ImplicationChecksByTransitivity, 14562.9ms TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2021-05-02 18:58:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-05-02 18:58:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2021-05-02 18:58:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 507 states have (on average 1.2209072978303748) internal successors, (619), 507 states have internal predecessors, (619), 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 18:58:38,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 623 transitions. [2021-05-02 18:58:38,523 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 623 transitions. Word has length 505 [2021-05-02 18:58:38,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:58:38,523 INFO L480 AbstractCegarLoop]: Abstraction has 512 states and 623 transitions. [2021-05-02 18:58:38,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 2.593220338983051) internal successors, (306), 117 states have internal predecessors, (306), 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 18:58:38,524 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 623 transitions. [2021-05-02 18:58:38,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-05-02 18:58:38,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:58:38,526 INFO L523 BasicCegarLoop]: trace histogram [168, 86, 82, 82, 53, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:58:38,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:58:38,726 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:58:38,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:58:38,726 INFO L82 PathProgramCache]: Analyzing trace with hash -806513364, now seen corresponding path program 85 times [2021-05-02 18:58:38,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:58:38,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230244895] [2021-05-02 18:58:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:58:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:58:42,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:58:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:58:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 34866 backedges. 14181 proven. 7482 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-02 18:58:42,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:58:42,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230244895] [2021-05-02 18:58:42,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230244895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:58:42,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336014067] [2021-05-02 18:58:42,127 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:58:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:58:42,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 88 conjunts are in the unsatisfiable core [2021-05-02 18:58:42,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:58:42,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:42,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 34866 backedges. 14181 proven. 7482 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-02 18:58:43,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336014067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:58:43,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:58:43,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89] total 91 [2021-05-02 18:58:43,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867222786] [2021-05-02 18:58:43,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 18:58:43,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:58:43,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 18:58:43,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 18:58:43,139 INFO L87 Difference]: Start difference. First operand 512 states and 623 transitions. Second operand has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 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 18:58:49,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:58:49,317 INFO L93 Difference]: Finished difference Result 514 states and 625 transitions. [2021-05-02 18:58:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 18:58:49,317 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 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 511 [2021-05-02 18:58:49,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:58:49,318 INFO L225 Difference]: With dead ends: 514 [2021-05-02 18:58:49,318 INFO L226 Difference]: Without dead ends: 514 [2021-05-02 18:58:49,320 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 9132.5ms TimeCoverageRelationStatistics Valid=11838, Invalid=19668, Unknown=0, NotChecked=0, Total=31506 [2021-05-02 18:58:49,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-05-02 18:58:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-05-02 18:58:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 509 states have (on average 1.2200392927308448) internal successors, (621), 509 states have internal predecessors, (621), 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 18:58:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 625 transitions. [2021-05-02 18:58:49,323 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 625 transitions. Word has length 511 [2021-05-02 18:58:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:58:49,323 INFO L480 AbstractCegarLoop]: Abstraction has 514 states and 625 transitions. [2021-05-02 18:58:49,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 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 18:58:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 625 transitions. [2021-05-02 18:58:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2021-05-02 18:58:49,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:58:49,325 INFO L523 BasicCegarLoop]: trace histogram [169, 87, 82, 82, 53, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:58:49,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-02 18:58:49,526 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:58:49,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:58:49,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1727955510, now seen corresponding path program 86 times [2021-05-02 18:58:49,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:58:49,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880719309] [2021-05-02 18:58:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:58:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:58:53,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:58:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:58:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 35203 backedges. 14344 proven. 7656 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-02 18:58:53,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:58:53,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880719309] [2021-05-02 18:58:53,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880719309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:58:53,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572587267] [2021-05-02 18:58:53,208 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:58:53,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:58:53,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:58:53,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-02 18:58:53,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:58:53,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:53,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:58:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 35203 backedges. 14344 proven. 7656 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-02 18:58:54,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572587267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:58:54,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:58:54,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90] total 92 [2021-05-02 18:58:54,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808047460] [2021-05-02 18:58:54,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 18:58:54,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:58:54,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 18:58:54,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 18:58:54,281 INFO L87 Difference]: Start difference. First operand 514 states and 625 transitions. Second operand has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 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 18:59:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:59:01,007 INFO L93 Difference]: Finished difference Result 516 states and 627 transitions. [2021-05-02 18:59:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 18:59:01,008 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 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 513 [2021-05-02 18:59:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:59:01,010 INFO L225 Difference]: With dead ends: 516 [2021-05-02 18:59:01,010 INFO L226 Difference]: Without dead ends: 516 [2021-05-02 18:59:01,011 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4173 ImplicationChecksByTransitivity, 9894.2ms TimeCoverageRelationStatistics Valid=12106, Invalid=20114, Unknown=0, NotChecked=0, Total=32220 [2021-05-02 18:59:01,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-02 18:59:01,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-05-02 18:59:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 511 states have (on average 1.2191780821917808) internal successors, (623), 511 states have internal predecessors, (623), 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 18:59:01,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 627 transitions. [2021-05-02 18:59:01,016 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 627 transitions. Word has length 513 [2021-05-02 18:59:01,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:59:01,016 INFO L480 AbstractCegarLoop]: Abstraction has 516 states and 627 transitions. [2021-05-02 18:59:01,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 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 18:59:01,016 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 627 transitions. [2021-05-02 18:59:01,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2021-05-02 18:59:01,018 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:59:01,018 INFO L523 BasicCegarLoop]: trace histogram [170, 88, 82, 82, 53, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:59:01,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:59:01,219 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:59:01,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:59:01,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1824372456, now seen corresponding path program 87 times [2021-05-02 18:59:01,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:59:01,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051109347] [2021-05-02 18:59:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:59:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:59:04,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:59:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:59:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 35542 backedges. 14507 proven. 7832 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-02 18:59:04,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:59:04,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051109347] [2021-05-02 18:59:04,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051109347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:59:04,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758927623] [2021-05-02 18:59:04,973 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:59:05,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2021-05-02 18:59:05,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:59:05,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 18:59:05,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:59:05,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:05,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:05,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:05,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:05,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:05,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:05,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:05,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:06,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:07,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:08,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:08,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:08,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:08,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:08,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:08,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:08,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:08,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:08,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:08,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 35542 backedges. 11416 proven. 1682 refuted. 0 times theorem prover too weak. 22444 trivial. 0 not checked. [2021-05-02 18:59:08,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758927623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:59:08,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:59:08,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 32] total 122 [2021-05-02 18:59:08,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357142472] [2021-05-02 18:59:08,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-02 18:59:08,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:59:08,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-02 18:59:08,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 18:59:08,604 INFO L87 Difference]: Start difference. First operand 516 states and 627 transitions. Second operand has 122 states, 122 states have (on average 2.5901639344262297) internal successors, (316), 121 states have internal predecessors, (316), 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 18:59:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:59:19,160 INFO L93 Difference]: Finished difference Result 524 states and 639 transitions. [2021-05-02 18:59:19,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-02 18:59:19,161 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.5901639344262297) internal successors, (316), 121 states have internal predecessors, (316), 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 515 [2021-05-02 18:59:19,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:59:19,162 INFO L225 Difference]: With dead ends: 524 [2021-05-02 18:59:19,162 INFO L226 Difference]: Without dead ends: 524 [2021-05-02 18:59:19,164 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7109 ImplicationChecksByTransitivity, 15821.0ms TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2021-05-02 18:59:19,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-05-02 18:59:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2021-05-02 18:59:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 517 states have (on average 1.2205029013539652) internal successors, (631), 517 states have internal predecessors, (631), 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 18:59:19,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 635 transitions. [2021-05-02 18:59:19,167 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 635 transitions. Word has length 515 [2021-05-02 18:59:19,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:59:19,167 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 635 transitions. [2021-05-02 18:59:19,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 122 states have (on average 2.5901639344262297) internal successors, (316), 121 states have internal predecessors, (316), 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 18:59:19,167 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 635 transitions. [2021-05-02 18:59:19,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2021-05-02 18:59:19,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:59:19,170 INFO L523 BasicCegarLoop]: trace histogram [172, 89, 83, 83, 53, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:59:19,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:59:19,370 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:59:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:59:19,370 INFO L82 PathProgramCache]: Analyzing trace with hash 893606911, now seen corresponding path program 88 times [2021-05-02 18:59:19,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:59:19,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235158916] [2021-05-02 18:59:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:59:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:59:22,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:59:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:59:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 36390 backedges. 14850 proven. 8010 refuted. 0 times theorem prover too weak. 13530 trivial. 0 not checked. [2021-05-02 18:59:22,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:59:22,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235158916] [2021-05-02 18:59:22,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235158916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:59:22,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633182004] [2021-05-02 18:59:22,967 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:59:23,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:59:23,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:59:23,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 91 conjunts are in the unsatisfiable core [2021-05-02 18:59:23,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:59:23,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 36390 backedges. 14850 proven. 8010 refuted. 0 times theorem prover too weak. 13530 trivial. 0 not checked. [2021-05-02 18:59:23,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633182004] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:59:23,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:59:23,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92] total 94 [2021-05-02 18:59:23,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148538262] [2021-05-02 18:59:23,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 18:59:23,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:59:23,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 18:59:23,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 18:59:23,947 INFO L87 Difference]: Start difference. First operand 522 states and 635 transitions. Second operand has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 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 18:59:30,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:59:30,268 INFO L93 Difference]: Finished difference Result 524 states and 637 transitions. [2021-05-02 18:59:30,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 18:59:30,269 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 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 521 [2021-05-02 18:59:30,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:59:30,270 INFO L225 Difference]: With dead ends: 524 [2021-05-02 18:59:30,270 INFO L226 Difference]: Without dead ends: 524 [2021-05-02 18:59:30,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 9353.1ms TimeCoverageRelationStatistics Valid=12651, Invalid=21021, Unknown=0, NotChecked=0, Total=33672 [2021-05-02 18:59:30,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-05-02 18:59:30,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2021-05-02 18:59:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 519 states have (on average 1.2196531791907514) internal successors, (633), 519 states have internal predecessors, (633), 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 18:59:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 637 transitions. [2021-05-02 18:59:30,274 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 637 transitions. Word has length 521 [2021-05-02 18:59:30,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:59:30,275 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 637 transitions. [2021-05-02 18:59:30,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 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 18:59:30,275 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 637 transitions. [2021-05-02 18:59:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2021-05-02 18:59:30,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:59:30,277 INFO L523 BasicCegarLoop]: trace histogram [173, 90, 83, 83, 53, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:59:30,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:59:30,477 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:59:30,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:59:30,478 INFO L82 PathProgramCache]: Analyzing trace with hash 700159773, now seen corresponding path program 89 times [2021-05-02 18:59:30,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:59:30,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660488031] [2021-05-02 18:59:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:59:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:59:34,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:59:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:59:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36735 backedges. 15015 proven. 8190 refuted. 0 times theorem prover too weak. 13530 trivial. 0 not checked. [2021-05-02 18:59:34,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:59:34,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660488031] [2021-05-02 18:59:34,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660488031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:59:34,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628655450] [2021-05-02 18:59:34,218 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:59:34,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 115 check-sat command(s) [2021-05-02 18:59:34,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:59:34,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 18:59:34,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:59:34,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:34,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:34,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:34,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:34,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:34,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:34,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:34,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:35,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:36,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:37,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:38,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:39,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:40,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:59:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 36735 backedges. 21570 proven. 6001 refuted. 0 times theorem prover too weak. 9164 trivial. 0 not checked. [2021-05-02 18:59:41,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628655450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:59:41,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:59:41,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 59] total 151 [2021-05-02 18:59:41,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261783213] [2021-05-02 18:59:41,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 151 states [2021-05-02 18:59:41,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:59:41,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-05-02 18:59:41,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2021-05-02 18:59:41,179 INFO L87 Difference]: Start difference. First operand 524 states and 637 transitions. Second operand has 151 states, 151 states have (on average 2.781456953642384) internal successors, (420), 150 states have internal predecessors, (420), 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 18:59:58,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:59:58,800 INFO L93 Difference]: Finished difference Result 542 states and 659 transitions. [2021-05-02 18:59:58,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-05-02 18:59:58,800 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.781456953642384) internal successors, (420), 150 states have internal predecessors, (420), 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 523 [2021-05-02 18:59:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:59:58,802 INFO L225 Difference]: With dead ends: 542 [2021-05-02 18:59:58,802 INFO L226 Difference]: Without dead ends: 542 [2021-05-02 18:59:58,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10968 ImplicationChecksByTransitivity, 24970.2ms TimeCoverageRelationStatistics Valid=33525, Invalid=55577, Unknown=0, NotChecked=0, Total=89102 [2021-05-02 18:59:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-05-02 18:59:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2021-05-02 18:59:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 537 states have (on average 1.2197392923649908) internal successors, (655), 537 states have internal predecessors, (655), 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 18:59:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 659 transitions. [2021-05-02 18:59:58,808 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 659 transitions. Word has length 523 [2021-05-02 18:59:58,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:59:58,808 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 659 transitions. [2021-05-02 18:59:58,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 151 states, 151 states have (on average 2.781456953642384) internal successors, (420), 150 states have internal predecessors, (420), 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 18:59:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 659 transitions. [2021-05-02 18:59:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2021-05-02 18:59:58,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:59:58,811 INFO L523 BasicCegarLoop]: trace histogram [178, 91, 87, 87, 57, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:59:59,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:59:59,011 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:59:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:59:59,012 INFO L82 PathProgramCache]: Analyzing trace with hash -751088229, now seen corresponding path program 90 times [2021-05-02 18:59:59,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:59:59,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158002946] [2021-05-02 18:59:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:59:59,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:00:02,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:00:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:00:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 39166 backedges. 15916 proven. 8372 refuted. 0 times theorem prover too weak. 14878 trivial. 0 not checked. [2021-05-02 19:00:02,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:00:02,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158002946] [2021-05-02 19:00:02,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158002946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:00:02,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924293716] [2021-05-02 19:00:02,892 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:00:03,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 123 check-sat command(s) [2021-05-02 19:00:03,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:00:03,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 19:00:03,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:00:03,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:03,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:03,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:03,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:04,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:05,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:06,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 39166 backedges. 12474 proven. 1800 refuted. 0 times theorem prover too weak. 24892 trivial. 0 not checked. [2021-05-02 19:00:07,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924293716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:00:07,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:00:07,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 33] total 126 [2021-05-02 19:00:07,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225422720] [2021-05-02 19:00:07,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-02 19:00:07,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:00:07,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-02 19:00:07,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 19:00:07,132 INFO L87 Difference]: Start difference. First operand 542 states and 659 transitions. Second operand has 126 states, 126 states have (on average 2.5873015873015874) internal successors, (326), 125 states have internal predecessors, (326), 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 19:00:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:00:19,741 INFO L93 Difference]: Finished difference Result 550 states and 671 transitions. [2021-05-02 19:00:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-02 19:00:19,742 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.5873015873015874) internal successors, (326), 125 states have internal predecessors, (326), 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 541 [2021-05-02 19:00:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:00:19,743 INFO L225 Difference]: With dead ends: 550 [2021-05-02 19:00:19,743 INFO L226 Difference]: Without dead ends: 550 [2021-05-02 19:00:19,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7594 ImplicationChecksByTransitivity, 18136.9ms TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2021-05-02 19:00:19,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-02 19:00:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 548. [2021-05-02 19:00:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 543 states have (on average 1.2209944751381216) internal successors, (663), 543 states have internal predecessors, (663), 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 19:00:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 667 transitions. [2021-05-02 19:00:19,749 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 667 transitions. Word has length 541 [2021-05-02 19:00:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:00:19,749 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 667 transitions. [2021-05-02 19:00:19,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 2.5873015873015874) internal successors, (326), 125 states have internal predecessors, (326), 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 19:00:19,749 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 667 transitions. [2021-05-02 19:00:19,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2021-05-02 19:00:19,752 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:00:19,752 INFO L523 BasicCegarLoop]: trace histogram [180, 92, 88, 88, 57, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:00:19,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-05-02 19:00:19,952 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:00:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:00:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2144876466, now seen corresponding path program 91 times [2021-05-02 19:00:19,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:00:19,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709335428] [2021-05-02 19:00:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:00:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:00:24,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:00:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:00:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 16275 proven. 8556 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-02 19:00:24,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:00:24,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709335428] [2021-05-02 19:00:24,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709335428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:00:24,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418799568] [2021-05-02 19:00:24,545 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:00:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:00:24,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 94 conjunts are in the unsatisfiable core [2021-05-02 19:00:24,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:00:24,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:24,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 16275 proven. 8556 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-02 19:00:25,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418799568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:00:25,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:00:25,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95] total 97 [2021-05-02 19:00:25,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935622695] [2021-05-02 19:00:25,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 19:00:25,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:00:25,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 19:00:25,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 19:00:25,742 INFO L87 Difference]: Start difference. First operand 548 states and 667 transitions. Second operand has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 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 19:00:33,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:00:33,598 INFO L93 Difference]: Finished difference Result 550 states and 669 transitions. [2021-05-02 19:00:33,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 19:00:33,599 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 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 547 [2021-05-02 19:00:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:00:33,600 INFO L225 Difference]: With dead ends: 550 [2021-05-02 19:00:33,601 INFO L226 Difference]: Without dead ends: 550 [2021-05-02 19:00:33,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 11834.2ms TimeCoverageRelationStatistics Valid=13491, Invalid=22419, Unknown=0, NotChecked=0, Total=35910 [2021-05-02 19:00:33,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-02 19:00:33,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-05-02 19:00:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 545 states have (on average 1.2201834862385321) internal successors, (665), 545 states have internal predecessors, (665), 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 19:00:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 669 transitions. [2021-05-02 19:00:33,606 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 669 transitions. Word has length 547 [2021-05-02 19:00:33,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:00:33,606 INFO L480 AbstractCegarLoop]: Abstraction has 550 states and 669 transitions. [2021-05-02 19:00:33,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 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 19:00:33,606 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 669 transitions. [2021-05-02 19:00:33,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2021-05-02 19:00:33,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:00:33,608 INFO L523 BasicCegarLoop]: trace histogram [181, 93, 88, 88, 57, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:00:33,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:00:33,809 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:00:33,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:00:33,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1263752880, now seen corresponding path program 92 times [2021-05-02 19:00:33,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:00:33,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742207420] [2021-05-02 19:00:33,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:00:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:00:38,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:00:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:00:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 40417 backedges. 16450 proven. 8742 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-02 19:00:38,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:00:38,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742207420] [2021-05-02 19:00:38,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742207420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:00:38,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798879091] [2021-05-02 19:00:38,527 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:00:38,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:00:38,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:00:38,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 19:00:38,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:00:38,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:38,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 40417 backedges. 16450 proven. 8742 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-02 19:00:39,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798879091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:00:39,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:00:39,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96] total 98 [2021-05-02 19:00:39,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200682312] [2021-05-02 19:00:39,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 19:00:39,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:00:39,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 19:00:39,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 19:00:39,694 INFO L87 Difference]: Start difference. First operand 550 states and 669 transitions. Second operand has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 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 19:00:47,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:00:47,113 INFO L93 Difference]: Finished difference Result 552 states and 671 transitions. [2021-05-02 19:00:47,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 19:00:47,114 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 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 549 [2021-05-02 19:00:47,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:00:47,115 INFO L225 Difference]: With dead ends: 552 [2021-05-02 19:00:47,115 INFO L226 Difference]: Without dead ends: 552 [2021-05-02 19:00:47,117 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4740 ImplicationChecksByTransitivity, 11463.2ms TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2021-05-02 19:00:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-05-02 19:00:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-05-02 19:00:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 547 states have (on average 1.2193784277879343) internal successors, (667), 547 states have internal predecessors, (667), 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 19:00:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 671 transitions. [2021-05-02 19:00:47,120 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 671 transitions. Word has length 549 [2021-05-02 19:00:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:00:47,121 INFO L480 AbstractCegarLoop]: Abstraction has 552 states and 671 transitions. [2021-05-02 19:00:47,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 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 19:00:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 671 transitions. [2021-05-02 19:00:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2021-05-02 19:00:47,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:00:47,123 INFO L523 BasicCegarLoop]: trace histogram [182, 94, 88, 88, 57, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:00:47,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-02 19:00:47,324 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:00:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:00:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash 103492462, now seen corresponding path program 93 times [2021-05-02 19:00:47,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:00:47,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939289966] [2021-05-02 19:00:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:00:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:00:51,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:00:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:00:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 40780 backedges. 16625 proven. 8930 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-02 19:00:51,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:00:51,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939289966] [2021-05-02 19:00:51,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939289966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:00:51,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319584670] [2021-05-02 19:00:51,771 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:00:51,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-05-02 19:00:51,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:00:51,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 19:00:51,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:00:52,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:52,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:52,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:52,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:52,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:52,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:52,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:52,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:53,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:54,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:55,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:56,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:56,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:56,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:56,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:00:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 40780 backedges. 13072 proven. 1922 refuted. 0 times theorem prover too weak. 25786 trivial. 0 not checked. [2021-05-02 19:00:56,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319584670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:00:56,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:00:56,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 34] total 130 [2021-05-02 19:00:56,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838677235] [2021-05-02 19:00:56,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-02 19:00:56,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:00:56,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-02 19:00:56,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 19:00:56,352 INFO L87 Difference]: Start difference. First operand 552 states and 671 transitions. Second operand has 130 states, 130 states have (on average 2.5846153846153848) internal successors, (336), 129 states have internal predecessors, (336), 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 19:01:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:01:10,188 INFO L93 Difference]: Finished difference Result 560 states and 683 transitions. [2021-05-02 19:01:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-02 19:01:10,189 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.5846153846153848) internal successors, (336), 129 states have internal predecessors, (336), 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 551 [2021-05-02 19:01:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:01:10,190 INFO L225 Difference]: With dead ends: 560 [2021-05-02 19:01:10,190 INFO L226 Difference]: Without dead ends: 560 [2021-05-02 19:01:10,192 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8095 ImplicationChecksByTransitivity, 20198.7ms TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2021-05-02 19:01:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-05-02 19:01:10,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 558. [2021-05-02 19:01:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 553 states have (on average 1.2206148282097649) internal successors, (675), 553 states have internal predecessors, (675), 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 19:01:10,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 679 transitions. [2021-05-02 19:01:10,195 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 679 transitions. Word has length 551 [2021-05-02 19:01:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:01:10,196 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 679 transitions. [2021-05-02 19:01:10,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 2.5846153846153848) internal successors, (336), 129 states have internal predecessors, (336), 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 19:01:10,196 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 679 transitions. [2021-05-02 19:01:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2021-05-02 19:01:10,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:01:10,198 INFO L523 BasicCegarLoop]: trace histogram [184, 95, 89, 89, 57, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:01:10,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:10,399 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:01:10,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:01:10,399 INFO L82 PathProgramCache]: Analyzing trace with hash 90089093, now seen corresponding path program 94 times [2021-05-02 19:01:10,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:01:10,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107557402] [2021-05-02 19:01:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:01:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:15,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:01:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 41688 backedges. 16992 proven. 9120 refuted. 0 times theorem prover too weak. 15576 trivial. 0 not checked. [2021-05-02 19:01:15,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:01:15,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107557402] [2021-05-02 19:01:15,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107557402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:15,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858934957] [2021-05-02 19:01:15,028 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:15,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:01:15,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:01:15,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-02 19:01:15,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:01:15,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:15,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 41688 backedges. 16992 proven. 9120 refuted. 0 times theorem prover too weak. 15576 trivial. 0 not checked. [2021-05-02 19:01:16,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858934957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:16,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:01:16,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98] total 100 [2021-05-02 19:01:16,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314945302] [2021-05-02 19:01:16,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 19:01:16,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:01:16,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 19:01:16,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 19:01:16,232 INFO L87 Difference]: Start difference. First operand 558 states and 679 transitions. Second operand has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 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 19:01:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:01:24,203 INFO L93 Difference]: Finished difference Result 560 states and 681 transitions. [2021-05-02 19:01:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 19:01:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 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 557 [2021-05-02 19:01:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:01:24,206 INFO L225 Difference]: With dead ends: 560 [2021-05-02 19:01:24,206 INFO L226 Difference]: Without dead ends: 560 [2021-05-02 19:01:24,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4937 ImplicationChecksByTransitivity, 11926.7ms TimeCoverageRelationStatistics Valid=14358, Invalid=23862, Unknown=0, NotChecked=0, Total=38220 [2021-05-02 19:01:24,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-05-02 19:01:24,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2021-05-02 19:01:24,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 555 states have (on average 1.2198198198198198) internal successors, (677), 555 states have internal predecessors, (677), 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 19:01:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 681 transitions. [2021-05-02 19:01:24,212 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 681 transitions. Word has length 557 [2021-05-02 19:01:24,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:01:24,212 INFO L480 AbstractCegarLoop]: Abstraction has 560 states and 681 transitions. [2021-05-02 19:01:24,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 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 19:01:24,212 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 681 transitions. [2021-05-02 19:01:24,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2021-05-02 19:01:24,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:01:24,214 INFO L523 BasicCegarLoop]: trace histogram [185, 96, 89, 89, 57, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:01:24,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:24,415 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:01:24,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:01:24,415 INFO L82 PathProgramCache]: Analyzing trace with hash 423635619, now seen corresponding path program 95 times [2021-05-02 19:01:24,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:01:24,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638539642] [2021-05-02 19:01:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:01:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:29,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:01:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 42057 backedges. 17169 proven. 9312 refuted. 0 times theorem prover too weak. 15576 trivial. 0 not checked. [2021-05-02 19:01:29,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:01:29,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638539642] [2021-05-02 19:01:29,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638539642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:29,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064189852] [2021-05-02 19:01:29,227 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:29,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 123 check-sat command(s) [2021-05-02 19:01:29,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:01:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 19:01:29,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:01:29,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:29,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:29,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:29,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:29,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:29,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:30,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:31,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:32,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:32,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:32,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:32,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:32,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:32,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:32,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:32,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:32,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:32,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:32,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:32,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:33,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:33,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:33,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:33,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:33,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:33,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:33,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:33,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:33,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:33,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:34,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:34,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:34,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:34,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:34,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:34,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:34,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:34,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:34,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:34,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:35,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:35,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:35,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:35,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:35,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:35,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:35,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:35,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:35,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:35,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:36,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:36,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:36,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:36,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:36,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:36,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:36,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:36,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:36,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:36,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:37,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:37,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:37,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:37,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:37,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:37,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:37,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:37,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:37,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:37,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:37,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:37,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:38,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:38,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:38,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:38,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:38,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:38,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:38,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:38,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:38,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:38,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:38,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:38,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:39,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:39,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:39,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:39,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:39,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:39,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 42057 backedges. 24670 proven. 6909 refuted. 0 times theorem prover too weak. 10478 trivial. 0 not checked. [2021-05-02 19:01:39,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064189852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:39,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:01:39,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 63] total 161 [2021-05-02 19:01:39,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140339039] [2021-05-02 19:01:39,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 161 states [2021-05-02 19:01:39,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:01:39,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-05-02 19:01:39,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12722, Invalid=13038, Unknown=0, NotChecked=0, Total=25760 [2021-05-02 19:01:39,911 INFO L87 Difference]: Start difference. First operand 560 states and 681 transitions. Second operand has 161 states, 161 states have (on average 2.782608695652174) internal successors, (448), 160 states have internal predecessors, (448), 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 19:02:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:02:02,120 INFO L93 Difference]: Finished difference Result 578 states and 703 transitions. [2021-05-02 19:02:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-05-02 19:02:02,121 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.782608695652174) internal successors, (448), 160 states have internal predecessors, (448), 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 559 [2021-05-02 19:02:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:02:02,122 INFO L225 Difference]: With dead ends: 578 [2021-05-02 19:02:02,122 INFO L226 Difference]: Without dead ends: 578 [2021-05-02 19:02:02,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12499 ImplicationChecksByTransitivity, 33642.1ms TimeCoverageRelationStatistics Valid=38160, Invalid=63282, Unknown=0, NotChecked=0, Total=101442 [2021-05-02 19:02:02,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-05-02 19:02:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2021-05-02 19:02:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 573 states have (on average 1.219895287958115) internal successors, (699), 573 states have internal predecessors, (699), 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 19:02:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 703 transitions. [2021-05-02 19:02:02,130 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 703 transitions. Word has length 559 [2021-05-02 19:02:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:02:02,130 INFO L480 AbstractCegarLoop]: Abstraction has 578 states and 703 transitions. [2021-05-02 19:02:02,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 161 states, 161 states have (on average 2.782608695652174) internal successors, (448), 160 states have internal predecessors, (448), 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 19:02:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 703 transitions. [2021-05-02 19:02:02,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2021-05-02 19:02:02,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:02:02,133 INFO L523 BasicCegarLoop]: trace histogram [190, 97, 93, 93, 61, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:02:02,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-02 19:02:02,337 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:02:02,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:02:02,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1481022943, now seen corresponding path program 96 times [2021-05-02 19:02:02,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:02:02,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354721455] [2021-05-02 19:02:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:02:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:07,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:02:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 44656 backedges. 18130 proven. 9506 refuted. 0 times theorem prover too weak. 17020 trivial. 0 not checked. [2021-05-02 19:02:07,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:02:07,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354721455] [2021-05-02 19:02:07,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354721455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:02:07,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466886423] [2021-05-02 19:02:07,823 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:02:08,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 131 check-sat command(s) [2021-05-02 19:02:08,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:02:08,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 19:02:08,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:02:09,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:09,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:10,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:11,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:12,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:13,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:13,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 44656 backedges. 14202 proven. 2048 refuted. 0 times theorem prover too weak. 28406 trivial. 0 not checked. [2021-05-02 19:02:13,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466886423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:02:13,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:02:13,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 35] total 134 [2021-05-02 19:02:13,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422863426] [2021-05-02 19:02:13,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-02 19:02:13,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:02:13,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-02 19:02:13,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 19:02:13,244 INFO L87 Difference]: Start difference. First operand 578 states and 703 transitions. Second operand has 134 states, 134 states have (on average 2.582089552238806) internal successors, (346), 133 states have internal predecessors, (346), 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 19:02:27,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:02:27,951 INFO L93 Difference]: Finished difference Result 586 states and 715 transitions. [2021-05-02 19:02:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-02 19:02:27,952 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.582089552238806) internal successors, (346), 133 states have internal predecessors, (346), 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 577 [2021-05-02 19:02:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:02:27,954 INFO L225 Difference]: With dead ends: 586 [2021-05-02 19:02:27,954 INFO L226 Difference]: Without dead ends: 586 [2021-05-02 19:02:27,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 841 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8612 ImplicationChecksByTransitivity, 22550.1ms TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2021-05-02 19:02:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-05-02 19:02:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2021-05-02 19:02:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 579 states have (on average 1.221070811744387) internal successors, (707), 579 states have internal predecessors, (707), 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 19:02:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 711 transitions. [2021-05-02 19:02:27,959 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 711 transitions. Word has length 577 [2021-05-02 19:02:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:02:27,959 INFO L480 AbstractCegarLoop]: Abstraction has 584 states and 711 transitions. [2021-05-02 19:02:27,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 134 states have (on average 2.582089552238806) internal successors, (346), 133 states have internal predecessors, (346), 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 19:02:27,960 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 711 transitions. [2021-05-02 19:02:27,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2021-05-02 19:02:27,962 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:02:27,962 INFO L523 BasicCegarLoop]: trace histogram [192, 98, 94, 94, 61, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:02:28,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-02 19:02:28,163 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:02:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:02:28,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2132090312, now seen corresponding path program 97 times [2021-05-02 19:02:28,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:02:28,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255819189] [2021-05-02 19:02:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:02:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:33,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:02:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 45606 backedges. 18513 proven. 9702 refuted. 0 times theorem prover too weak. 17391 trivial. 0 not checked. [2021-05-02 19:02:33,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:02:33,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255819189] [2021-05-02 19:02:33,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255819189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:02:33,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014959841] [2021-05-02 19:02:33,596 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:02:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:33,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-02 19:02:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:02:33,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:33,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:34,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 45606 backedges. 18513 proven. 9702 refuted. 0 times theorem prover too weak. 17391 trivial. 0 not checked. [2021-05-02 19:02:35,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014959841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:02:35,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:02:35,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101] total 103 [2021-05-02 19:02:35,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48377522] [2021-05-02 19:02:35,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 19:02:35,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:02:35,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 19:02:35,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 19:02:35,073 INFO L87 Difference]: Start difference. First operand 584 states and 711 transitions. Second operand has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 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 19:02:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:02:44,289 INFO L93 Difference]: Finished difference Result 586 states and 713 transitions. [2021-05-02 19:02:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 19:02:44,290 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 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 583 [2021-05-02 19:02:44,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:02:44,292 INFO L225 Difference]: With dead ends: 586 [2021-05-02 19:02:44,292 INFO L226 Difference]: Without dead ends: 586 [2021-05-02 19:02:44,293 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 13841.2ms TimeCoverageRelationStatistics Valid=15252, Invalid=25350, Unknown=0, NotChecked=0, Total=40602 [2021-05-02 19:02:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-05-02 19:02:44,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-05-02 19:02:44,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 581 states have (on average 1.2203098106712564) internal successors, (709), 581 states have internal predecessors, (709), 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 19:02:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 713 transitions. [2021-05-02 19:02:44,297 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 713 transitions. Word has length 583 [2021-05-02 19:02:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:02:44,297 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 713 transitions. [2021-05-02 19:02:44,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 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 19:02:44,297 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 713 transitions. [2021-05-02 19:02:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2021-05-02 19:02:44,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:02:44,299 INFO L523 BasicCegarLoop]: trace histogram [193, 99, 94, 94, 61, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:02:44,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:02:44,513 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:02:44,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:02:44,513 INFO L82 PathProgramCache]: Analyzing trace with hash 296705238, now seen corresponding path program 98 times [2021-05-02 19:02:44,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:02:44,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123208649] [2021-05-02 19:02:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:02:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:50,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:02:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 45991 backedges. 18700 proven. 9900 refuted. 0 times theorem prover too weak. 17391 trivial. 0 not checked. [2021-05-02 19:02:50,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:02:50,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123208649] [2021-05-02 19:02:50,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123208649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:02:50,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527856248] [2021-05-02 19:02:50,174 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:02:50,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:02:50,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:02:50,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 101 conjunts are in the unsatisfiable core [2021-05-02 19:02:50,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:02:50,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:50,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:51,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:51,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:51,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:51,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:51,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:51,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:51,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 45991 backedges. 18700 proven. 9900 refuted. 0 times theorem prover too weak. 17391 trivial. 0 not checked. [2021-05-02 19:02:51,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527856248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:02:51,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:02:51,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102] total 104 [2021-05-02 19:02:51,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526788119] [2021-05-02 19:02:51,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 19:02:51,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:02:51,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 19:02:51,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 19:02:51,688 INFO L87 Difference]: Start difference. First operand 586 states and 713 transitions. Second operand has 104 states, 104 states have (on average 2.076923076923077) internal successors, (216), 103 states have internal predecessors, (216), 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 19:03:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:03:02,512 INFO L93 Difference]: Finished difference Result 588 states and 715 transitions. [2021-05-02 19:03:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-02 19:03:02,513 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.076923076923077) internal successors, (216), 103 states have internal predecessors, (216), 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 585 [2021-05-02 19:03:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:03:02,514 INFO L225 Difference]: With dead ends: 588 [2021-05-02 19:03:02,514 INFO L226 Difference]: Without dead ends: 588 [2021-05-02 19:03:02,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5343 ImplicationChecksByTransitivity, 15757.6ms TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2021-05-02 19:03:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-02 19:03:02,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2021-05-02 19:03:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 583 states have (on average 1.2195540308747856) internal successors, (711), 583 states have internal predecessors, (711), 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 19:03:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 715 transitions. [2021-05-02 19:03:02,518 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 715 transitions. Word has length 585 [2021-05-02 19:03:02,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:03:02,519 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 715 transitions. [2021-05-02 19:03:02,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 2.076923076923077) internal successors, (216), 103 states have internal predecessors, (216), 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 19:03:02,519 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 715 transitions. [2021-05-02 19:03:02,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2021-05-02 19:03:02,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:03:02,521 INFO L523 BasicCegarLoop]: trace histogram [194, 100, 94, 94, 61, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:03:02,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-02 19:03:02,722 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:03:02,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:03:02,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2092980236, now seen corresponding path program 99 times [2021-05-02 19:03:02,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:03:02,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706268124] [2021-05-02 19:03:02,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:03:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:08,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:03:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 46378 backedges. 18887 proven. 10100 refuted. 0 times theorem prover too weak. 17391 trivial. 0 not checked. [2021-05-02 19:03:08,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:03:08,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706268124] [2021-05-02 19:03:08,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706268124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:08,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873825781] [2021-05-02 19:03:08,713 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:08,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2021-05-02 19:03:08,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:03:08,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 19:03:08,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:03:09,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:09,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:11,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:13,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:13,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:13,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:13,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:13,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:13,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:13,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:13,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:13,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:13,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:13,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:13,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 46378 backedges. 14840 proven. 2178 refuted. 0 times theorem prover too weak. 29360 trivial. 0 not checked. [2021-05-02 19:03:14,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873825781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:14,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:03:14,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 36] total 138 [2021-05-02 19:03:14,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568048374] [2021-05-02 19:03:14,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-02 19:03:14,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:03:14,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-02 19:03:14,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 19:03:14,885 INFO L87 Difference]: Start difference. First operand 588 states and 715 transitions. Second operand has 138 states, 138 states have (on average 2.579710144927536) internal successors, (356), 137 states have internal predecessors, (356), 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 19:03:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:03:32,445 INFO L93 Difference]: Finished difference Result 596 states and 727 transitions. [2021-05-02 19:03:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-02 19:03:32,446 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.579710144927536) internal successors, (356), 137 states have internal predecessors, (356), 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 587 [2021-05-02 19:03:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:03:32,447 INFO L225 Difference]: With dead ends: 596 [2021-05-02 19:03:32,447 INFO L226 Difference]: Without dead ends: 596 [2021-05-02 19:03:32,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 859 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9145 ImplicationChecksByTransitivity, 26412.4ms TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2021-05-02 19:03:32,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-05-02 19:03:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 594. [2021-05-02 19:03:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 589 states have (on average 1.2207130730050935) internal successors, (719), 589 states have internal predecessors, (719), 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 19:03:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 723 transitions. [2021-05-02 19:03:32,453 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 723 transitions. Word has length 587 [2021-05-02 19:03:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:03:32,453 INFO L480 AbstractCegarLoop]: Abstraction has 594 states and 723 transitions. [2021-05-02 19:03:32,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 138 states, 138 states have (on average 2.579710144927536) internal successors, (356), 137 states have internal predecessors, (356), 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 19:03:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 723 transitions. [2021-05-02 19:03:32,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2021-05-02 19:03:32,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:03:32,456 INFO L523 BasicCegarLoop]: trace histogram [196, 101, 95, 95, 61, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:03:32,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-02 19:03:32,656 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:03:32,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:03:32,656 INFO L82 PathProgramCache]: Analyzing trace with hash -2029225717, now seen corresponding path program 100 times [2021-05-02 19:03:32,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:03:32,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005742383] [2021-05-02 19:03:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:03:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:39,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:03:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 47346 backedges. 19278 proven. 10302 refuted. 0 times theorem prover too weak. 17766 trivial. 0 not checked. [2021-05-02 19:03:39,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:03:39,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005742383] [2021-05-02 19:03:39,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005742383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:39,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430879538] [2021-05-02 19:03:39,024 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:39,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:03:39,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:03:39,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-02 19:03:39,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:03:39,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:39,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 47346 backedges. 19278 proven. 10302 refuted. 0 times theorem prover too weak. 17766 trivial. 0 not checked. [2021-05-02 19:03:40,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430879538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:40,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:03:40,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104] total 106 [2021-05-02 19:03:40,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152258274] [2021-05-02 19:03:40,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 19:03:40,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:03:40,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 19:03:40,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 19:03:40,667 INFO L87 Difference]: Start difference. First operand 594 states and 723 transitions. Second operand has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 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)