/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/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:37:56,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:37:56,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:37:56,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:37:56,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:37:56,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:37:56,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:37:56,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:37:56,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:37:56,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:37:56,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:37:56,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:37:56,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:37:56,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:37:56,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:37:56,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:37:56,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:37:56,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:37:56,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:37:56,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:37:56,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:37:56,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:37:56,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:37:56,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:37:56,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:37:56,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:37:56,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:37:56,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:37:56,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:37:56,437 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:37:56,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:37:56,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:37:56,439 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:37:56,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:37:56,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:37:56,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:37:56,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:37:56,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:37:56,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:37:56,440 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:37:56,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:37:56,440 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:37:56,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:37:56,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:37:56,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:37:56,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:37:56,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:37:56,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:37:56,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:37:56,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:37:56,442 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:37:56,442 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:37:56,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:37:56,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:37:56,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:37:56,689 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:37:56,689 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:37:56,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2021-05-02 18:37:56,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a88e7f581/f454367fad464c559d2ce51a9084d4a7/FLAG62787f06d [2021-05-02 18:37:57,149 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:37:57,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2021-05-02 18:37:57,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a88e7f581/f454367fad464c559d2ce51a9084d4a7/FLAG62787f06d [2021-05-02 18:37:57,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a88e7f581/f454367fad464c559d2ce51a9084d4a7 [2021-05-02 18:37:57,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:37:57,173 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:37:57,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:37:57,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:37:57,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:37:57,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:37:57" (1/1) ... [2021-05-02 18:37:57,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74582eb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:37:57, skipping insertion in model container [2021-05-02 18:37:57,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:37:57" (1/1) ... [2021-05-02 18:37:57,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:37:57,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:37:57,288 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/loopv3.c[456,469] [2021-05-02 18:37:57,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:37:57,299 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:37:57,307 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/loopv3.c[456,469] [2021-05-02 18:37:57,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:37:57,318 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:37:57,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:37:57 WrapperNode [2021-05-02 18:37:57,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:37:57,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:37:57,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:37:57,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:37:57,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:37:57" (1/1) ... [2021-05-02 18:37:57,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:37:57" (1/1) ... [2021-05-02 18:37:57,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:37:57" (1/1) ... [2021-05-02 18:37:57,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:37:57" (1/1) ... [2021-05-02 18:37:57,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:37:57" (1/1) ... [2021-05-02 18:37:57,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:37:57" (1/1) ... [2021-05-02 18:37:57,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:37:57" (1/1) ... [2021-05-02 18:37:57,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:37:57,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:37:57,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:37:57,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:37:57,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:37:57" (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 18:37:57,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:37:57,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:37:57,450 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:37:57,450 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:37:57,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:37:57,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:37:57,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:37:57,450 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:37:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:37:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:37:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:37:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:37:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:37:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:37:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:37:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:37:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:37:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:37:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:37:57,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:37:57,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:37:57,714 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:37:57,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:37:57 BoogieIcfgContainer [2021-05-02 18:37:57,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:37:57,716 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:37:57,716 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:37:57,716 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:37:57,718 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:37:57" (1/1) ... [2021-05-02 18:37:57,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:37:57 BasicIcfg [2021-05-02 18:37:57,729 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:37:57,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:37:57,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:37:57,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:37:57,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:37:57" (1/4) ... [2021-05-02 18:37:57,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fae4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:37:57, skipping insertion in model container [2021-05-02 18:37:57,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:37:57" (2/4) ... [2021-05-02 18:37:57,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fae4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:37:57, skipping insertion in model container [2021-05-02 18:37:57,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:37:57" (3/4) ... [2021-05-02 18:37:57,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fae4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:37:57, skipping insertion in model container [2021-05-02 18:37:57,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:37:57" (4/4) ... [2021-05-02 18:37:57,735 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.cJordan [2021-05-02 18:37:57,738 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:37:57,741 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:37:57,757 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:37:57,771 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:37:57,771 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:37:57,771 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:37:57,772 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:37:57,772 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:37:57,772 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:37:57,772 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:37:57,772 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:37:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 18:37:57,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:37:57,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:37:57,786 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:37:57,786 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:37:57,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:37:57,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1479494173, now seen corresponding path program 1 times [2021-05-02 18:37:57,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:37:57,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220761667] [2021-05-02 18:37:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:37:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:37:57,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:37:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:37:57,934 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 18:37:57,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:37:57,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220761667] [2021-05-02 18:37:57,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220761667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:37:57,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:37:57,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:37:57,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522669025] [2021-05-02 18:37:57,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:37:57,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:37:57,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:37:57,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:37:57,950 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 18:37:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:37:58,024 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-05-02 18:37:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:37:58,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-02 18:37:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:37:58,031 INFO L225 Difference]: With dead ends: 21 [2021-05-02 18:37:58,031 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 18:37:58,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:37:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 18:37:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 18:37:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 18:37:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-02 18:37:58,053 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-05-02 18:37:58,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:37:58,053 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-02 18:37:58,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 18:37:58,053 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-02 18:37:58,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:37:58,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:37:58,054 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:37:58,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:37:58,054 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:37:58,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:37:58,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1508123324, now seen corresponding path program 1 times [2021-05-02 18:37:58,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:37:58,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620784615] [2021-05-02 18:37:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:37:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:37:58,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:37:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:37:58,197 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 18:37:58,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:37:58,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620784615] [2021-05-02 18:37:58,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620784615] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:37:58,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:37:58,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:37:58,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650022912] [2021-05-02 18:37:58,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 18:37:58,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:37:58,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 18:37:58,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:37:58,200 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 18:37:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:37:58,296 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-05-02 18:37:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 18:37:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 12 [2021-05-02 18:37:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:37:58,298 INFO L225 Difference]: With dead ends: 16 [2021-05-02 18:37:58,298 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 18:37:58,299 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:37:58,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 18:37:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 18:37:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:37:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 18:37:58,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-05-02 18:37:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:37:58,301 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 18:37:58,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 18:37:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 18:37:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 18:37:58,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:37:58,302 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:37:58,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:37:58,302 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:37:58,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:37:58,303 INFO L82 PathProgramCache]: Analyzing trace with hash 89998238, now seen corresponding path program 1 times [2021-05-02 18:37:58,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:37:58,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053193209] [2021-05-02 18:37:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:37:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:37:58,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:37:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:37:58,390 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 18:37:58,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:37:58,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053193209] [2021-05-02 18:37:58,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053193209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:37:58,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819631305] [2021-05-02 18:37:58,390 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 18:37:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:37:58,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 18:37:58,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:37:58,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:58,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:58,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:58,576 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 18:37:58,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819631305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:37:58,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:37:58,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-02 18:37:58,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233754611] [2021-05-02 18:37:58,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:37:58,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:37:58,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:37:58,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:37:58,578 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:37:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:37:58,728 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-05-02 18:37:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:37:58,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 4 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 14 [2021-05-02 18:37:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:37:58,729 INFO L225 Difference]: With dead ends: 18 [2021-05-02 18:37:58,730 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 18:37:58,730 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:37:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 18:37:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 18:37:58,731 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 18:37:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 18:37:58,732 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-05-02 18:37:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:37:58,732 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 18:37:58,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:37:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 18:37:58,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 18:37:58,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:37:58,733 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:37:58,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:37:58,949 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:37:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:37:58,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1223576576, now seen corresponding path program 2 times [2021-05-02 18:37:58,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:37:58,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707016034] [2021-05-02 18:37:58,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:37:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:37:59,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:37:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:37:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:37:59,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:37:59,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707016034] [2021-05-02 18:37:59,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707016034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:37:59,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962526375] [2021-05-02 18:37:59,044 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 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 18:37:59,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:37:59,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:37:59,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 18:37:59,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:37:59,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:59,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:59,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:59,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:59,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:37:59,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962526375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:37:59,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:37:59,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-02 18:37:59,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267847113] [2021-05-02 18:37:59,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 18:37:59,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:37:59,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 18:37:59,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:37:59,218 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:37:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:37:59,343 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-05-02 18:37:59,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:37:59,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 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 16 [2021-05-02 18:37:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:37:59,344 INFO L225 Difference]: With dead ends: 20 [2021-05-02 18:37:59,344 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 18:37:59,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:37:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 18:37:59,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-02 18:37:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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 18:37:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-05-02 18:37:59,347 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2021-05-02 18:37:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:37:59,347 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-05-02 18:37:59,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:37:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-05-02 18:37:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 18:37:59,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:37:59,347 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:37:59,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:37:59,563 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:37:59,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:37:59,563 INFO L82 PathProgramCache]: Analyzing trace with hash -848587806, now seen corresponding path program 3 times [2021-05-02 18:37:59,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:37:59,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748605269] [2021-05-02 18:37:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:37:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:37:59,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:37:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:37:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:37:59,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:37:59,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748605269] [2021-05-02 18:37:59,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748605269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:37:59,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320562025] [2021-05-02 18:37:59,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:37:59,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 18:37:59,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:37:59,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 18:37:59,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:37:59,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:59,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:59,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:59,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:59,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:59,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:59,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:37:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:37:59,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320562025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:37:59,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:37:59,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-02 18:37:59,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582416081] [2021-05-02 18:37:59,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 18:37:59,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:37:59,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 18:37:59,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:37:59,822 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:00,005 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2021-05-02 18:38:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:38:00,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 4 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 18 [2021-05-02 18:38:00,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:00,007 INFO L225 Difference]: With dead ends: 22 [2021-05-02 18:38:00,007 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 18:38:00,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-02 18:38:00,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 18:38:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 18:38:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 16 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 18:38:00,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-05-02 18:38:00,010 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2021-05-02 18:38:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:00,010 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-05-02 18:38:00,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-05-02 18:38:00,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 18:38:00,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:00,010 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:00,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:00,221 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:00,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1261632700, now seen corresponding path program 4 times [2021-05-02 18:38:00,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:00,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609655327] [2021-05-02 18:38:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:00,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:00,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:00,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609655327] [2021-05-02 18:38:00,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609655327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:00,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485501128] [2021-05-02 18:38:00,319 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 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 18:38:00,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:38:00,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:00,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 18:38:00,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:00,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485501128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:00,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:00,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-05-02 18:38:00,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212098664] [2021-05-02 18:38:00,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 18:38:00,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:00,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 18:38:00,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 18:38:00,445 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:38:00,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:00,951 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-05-02 18:38:00,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 18:38:00,951 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-05-02 18:38:00,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:00,952 INFO L225 Difference]: With dead ends: 32 [2021-05-02 18:38:00,952 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 18:38:00,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-05-02 18:38:00,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 18:38:00,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-05-02 18:38:00,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:00,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-02 18:38:00,955 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2021-05-02 18:38:00,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:00,955 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-02 18:38:00,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:38:00,955 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-02 18:38:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 18:38:00,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:00,955 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:01,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:01,156 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:01,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:01,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1234182694, now seen corresponding path program 5 times [2021-05-02 18:38:01,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:01,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675222778] [2021-05-02 18:38:01,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:01,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:01,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:01,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675222778] [2021-05-02 18:38:01,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675222778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:01,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040921288] [2021-05-02 18:38:01,261 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 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 18:38:01,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 18:38:01,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 18:38:01,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:01,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:01,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:01,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:01,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:01,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:01,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:01,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:01,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:01,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:01,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:01,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:01,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040921288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:01,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:01,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-02 18:38:01,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074850169] [2021-05-02 18:38:01,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 18:38:01,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:01,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 18:38:01,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-02 18:38:01,421 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:01,687 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2021-05-02 18:38:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 18:38:01,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (4), 4 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 22 [2021-05-02 18:38:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:01,688 INFO L225 Difference]: With dead ends: 26 [2021-05-02 18:38:01,688 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 18:38:01,688 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-05-02 18:38:01,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 18:38:01,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 18:38:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 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 18:38:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-05-02 18:38:01,690 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 22 [2021-05-02 18:38:01,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:01,694 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-05-02 18:38:01,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:01,694 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-05-02 18:38:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 18:38:01,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:01,694 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:01,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 18:38:01,895 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:01,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:01,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1173942136, now seen corresponding path program 6 times [2021-05-02 18:38:01,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:01,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388344303] [2021-05-02 18:38:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:01,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:02,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:02,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388344303] [2021-05-02 18:38:02,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388344303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:02,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385621728] [2021-05-02 18:38:02,005 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 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 18:38:02,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 18:38:02,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:02,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 18:38:02,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:02,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:02,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385621728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:02,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:02,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-02 18:38:02,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074385649] [2021-05-02 18:38:02,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 18:38:02,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:02,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 18:38:02,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:38:02,241 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:02,504 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-05-02 18:38:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 18:38:02,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 4 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 24 [2021-05-02 18:38:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:02,505 INFO L225 Difference]: With dead ends: 28 [2021-05-02 18:38:02,505 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 18:38:02,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 322.6ms TimeCoverageRelationStatistics Valid=233, Invalid=417, Unknown=0, NotChecked=0, Total=650 [2021-05-02 18:38:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 18:38:02,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 18:38:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 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 18:38:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-05-02 18:38:02,510 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 24 [2021-05-02 18:38:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:02,510 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-05-02 18:38:02,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-05-02 18:38:02,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 18:38:02,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:02,511 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:02,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:02,712 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:02,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:02,712 INFO L82 PathProgramCache]: Analyzing trace with hash -394531222, now seen corresponding path program 7 times [2021-05-02 18:38:02,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:02,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669008468] [2021-05-02 18:38:02,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:02,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:02,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:02,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669008468] [2021-05-02 18:38:02,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669008468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:02,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655135464] [2021-05-02 18:38:02,805 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 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 18:38:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:02,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 18:38:02,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:02,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:02,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655135464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:02,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:02,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-02 18:38:02,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749887920] [2021-05-02 18:38:02,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 18:38:02,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:02,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 18:38:02,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-02 18:38:02,989 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:03,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:03,316 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-05-02 18:38:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 18:38:03,316 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 3 states have call successors, (4), 4 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 26 [2021-05-02 18:38:03,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:03,317 INFO L225 Difference]: With dead ends: 30 [2021-05-02 18:38:03,317 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 18:38:03,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=289, Invalid=523, Unknown=0, NotChecked=0, Total=812 [2021-05-02 18:38:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 18:38:03,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 18:38:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 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 18:38:03,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2021-05-02 18:38:03,320 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 26 [2021-05-02 18:38:03,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:03,320 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2021-05-02 18:38:03,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:03,320 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2021-05-02 18:38:03,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 18:38:03,320 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:03,321 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:03,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:03,537 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:03,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:03,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1295047628, now seen corresponding path program 8 times [2021-05-02 18:38:03,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:03,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189755219] [2021-05-02 18:38:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:03,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:03,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:03,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189755219] [2021-05-02 18:38:03,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189755219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:03,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392162810] [2021-05-02 18:38:03,637 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 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 18:38:03,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:38:03,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 18:38:03,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:03,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:03,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392162810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:03,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:03,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-02 18:38:03,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699690722] [2021-05-02 18:38:03,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 18:38:03,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:03,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 18:38:03,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-02 18:38:03,836 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:04,247 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-05-02 18:38:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 18:38:04,247 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 4 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 28 [2021-05-02 18:38:04,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:04,248 INFO L225 Difference]: With dead ends: 32 [2021-05-02 18:38:04,248 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 18:38:04,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2021-05-02 18:38:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 18:38:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-02 18:38:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-05-02 18:38:04,251 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 28 [2021-05-02 18:38:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:04,251 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-05-02 18:38:04,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-05-02 18:38:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 18:38:04,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:04,251 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:04,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 18:38:04,457 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:04,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1482684590, now seen corresponding path program 9 times [2021-05-02 18:38:04,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:04,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624058688] [2021-05-02 18:38:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:04,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:04,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:04,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624058688] [2021-05-02 18:38:04,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624058688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:04,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79350839] [2021-05-02 18:38:04,575 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 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 18:38:04,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 18:38:04,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:04,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 18:38:04,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:04,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:04,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79350839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:04,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:04,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-02 18:38:04,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63840926] [2021-05-02 18:38:04,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 18:38:04,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:04,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 18:38:04,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-02 18:38:04,812 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:05,223 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-05-02 18:38:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 18:38:05,223 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 3 states have call successors, (4), 4 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 30 [2021-05-02 18:38:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:05,225 INFO L225 Difference]: With dead ends: 34 [2021-05-02 18:38:05,226 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 18:38:05,226 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 470.5ms TimeCoverageRelationStatistics Valid=419, Invalid=771, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 18:38:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 18:38:05,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 18:38:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 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 18:38:05,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 18:38:05,228 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 30 [2021-05-02 18:38:05,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:05,228 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 18:38:05,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:05,229 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 18:38:05,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 18:38:05,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:05,229 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:05,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:05,440 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:05,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1413178640, now seen corresponding path program 10 times [2021-05-02 18:38:05,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:05,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650594993] [2021-05-02 18:38:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:05,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:05,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:05,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650594993] [2021-05-02 18:38:05,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650594993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:05,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535869860] [2021-05-02 18:38:05,549 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 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 18:38:05,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:38:05,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:05,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 18:38:05,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:05,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535869860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:05,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:05,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 29 [2021-05-02 18:38:05,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319004076] [2021-05-02 18:38:05,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 18:38:05,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:05,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 18:38:05,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-05-02 18:38:05,798 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:38:07,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:07,116 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-05-02 18:38:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 18:38:07,117 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-05-02 18:38:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:07,118 INFO L225 Difference]: With dead ends: 56 [2021-05-02 18:38:07,119 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 18:38:07,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1142.1ms TimeCoverageRelationStatistics Valid=464, Invalid=2086, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 18:38:07,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 18:38:07,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2021-05-02 18:38:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 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 18:38:07,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 18:38:07,131 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 32 [2021-05-02 18:38:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:07,133 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 18:38:07,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:38:07,133 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 18:38:07,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 18:38:07,135 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:07,136 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:07,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:07,353 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:07,354 INFO L82 PathProgramCache]: Analyzing trace with hash -957529870, now seen corresponding path program 11 times [2021-05-02 18:38:07,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:07,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958211201] [2021-05-02 18:38:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:07,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:07,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:07,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958211201] [2021-05-02 18:38:07,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958211201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:07,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212001680] [2021-05-02 18:38:07,502 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 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 18:38:07,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 18:38:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:07,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 18:38:07,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:07,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:07,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212001680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:07,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:07,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-02 18:38:07,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035730086] [2021-05-02 18:38:07,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 18:38:07,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:07,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 18:38:07,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-02 18:38:07,795 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:08,213 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-05-02 18:38:08,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 18:38:08,213 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (4), 4 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 34 [2021-05-02 18:38:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:08,215 INFO L225 Difference]: With dead ends: 38 [2021-05-02 18:38:08,215 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 18:38:08,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 549.1ms TimeCoverageRelationStatistics Valid=573, Invalid=1067, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 18:38:08,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 18:38:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 18:38:08,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2021-05-02 18:38:08,222 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 34 [2021-05-02 18:38:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:08,223 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2021-05-02 18:38:08,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2021-05-02 18:38:08,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 18:38:08,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:08,225 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:08,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 18:38:08,437 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:08,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1419226196, now seen corresponding path program 12 times [2021-05-02 18:38:08,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:08,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203655395] [2021-05-02 18:38:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:08,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:08,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:08,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203655395] [2021-05-02 18:38:08,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203655395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:08,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894670654] [2021-05-02 18:38:08,577 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 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 18:38:08,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 18:38:08,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:08,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 18:38:08,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:08,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:08,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894670654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:08,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:08,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-02 18:38:08,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808363540] [2021-05-02 18:38:08,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 18:38:08,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:08,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 18:38:08,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-02 18:38:08,856 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:09,388 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-05-02 18:38:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 18:38:09,389 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 3 states have call successors, (4), 4 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 36 [2021-05-02 18:38:09,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:09,389 INFO L225 Difference]: With dead ends: 40 [2021-05-02 18:38:09,389 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 18:38:09,390 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 594.5ms TimeCoverageRelationStatistics Valid=659, Invalid=1233, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 18:38:09,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 18:38:09,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 18:38:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 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 18:38:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-05-02 18:38:09,391 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 36 [2021-05-02 18:38:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:09,391 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-05-02 18:38:09,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-05-02 18:38:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 18:38:09,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:09,392 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:09,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 18:38:09,593 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:09,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:09,593 INFO L82 PathProgramCache]: Analyzing trace with hash 559204150, now seen corresponding path program 13 times [2021-05-02 18:38:09,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:09,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738798355] [2021-05-02 18:38:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:09,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:09,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:09,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738798355] [2021-05-02 18:38:09,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738798355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:09,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77733106] [2021-05-02 18:38:09,760 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 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 18:38:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 18:38:09,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:09,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:09,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:10,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:10,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:10,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:10,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:10,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:10,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77733106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:10,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:10,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-02 18:38:10,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924247871] [2021-05-02 18:38:10,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 18:38:10,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:10,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 18:38:10,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-02 18:38:10,063 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 30 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:10,582 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-05-02 18:38:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 18:38:10,583 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 30 states have internal predecessors, (63), 3 states have call successors, (4), 4 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 38 [2021-05-02 18:38:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:10,583 INFO L225 Difference]: With dead ends: 42 [2021-05-02 18:38:10,583 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 18:38:10,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 651.6ms TimeCoverageRelationStatistics Valid=751, Invalid=1411, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 18:38:10,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 18:38:10,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 18:38:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 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 18:38:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2021-05-02 18:38:10,585 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 38 [2021-05-02 18:38:10,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:10,585 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-05-02 18:38:10,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 30 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:10,585 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2021-05-02 18:38:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 18:38:10,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:10,586 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:10,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 18:38:10,795 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1288261224, now seen corresponding path program 14 times [2021-05-02 18:38:10,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:10,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772352790] [2021-05-02 18:38:10,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:10,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:10,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:10,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772352790] [2021-05-02 18:38:10,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772352790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:10,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751456385] [2021-05-02 18:38:10,955 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 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 18:38:11,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:38:11,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:11,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 18:38:11,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:11,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:11,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751456385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:11,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:11,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-02 18:38:11,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619611096] [2021-05-02 18:38:11,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 18:38:11,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:11,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 18:38:11,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 18:38:11,256 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:11,874 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-02 18:38:11,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 18:38:11,875 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 4 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 40 [2021-05-02 18:38:11,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:11,875 INFO L225 Difference]: With dead ends: 44 [2021-05-02 18:38:11,875 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 18:38:11,876 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 707.2ms TimeCoverageRelationStatistics Valid=849, Invalid=1601, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 18:38:11,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 18:38:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 18:38:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-05-02 18:38:11,877 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 40 [2021-05-02 18:38:11,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:11,877 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-05-02 18:38:11,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:11,878 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-05-02 18:38:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 18:38:11,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:11,878 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:12,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:12,093 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:12,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1413974906, now seen corresponding path program 15 times [2021-05-02 18:38:12,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:12,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453648562] [2021-05-02 18:38:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:12,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:12,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:12,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453648562] [2021-05-02 18:38:12,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453648562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:12,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079186485] [2021-05-02 18:38:12,275 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 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 18:38:12,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 18:38:12,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:12,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 18:38:12,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:12,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:12,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079186485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:12,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:12,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-02 18:38:12,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540979438] [2021-05-02 18:38:12,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 18:38:12,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:12,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 18:38:12,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 18:38:12,624 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:13,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:13,262 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-05-02 18:38:13,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 18:38:13,262 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (4), 4 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 42 [2021-05-02 18:38:13,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:13,263 INFO L225 Difference]: With dead ends: 46 [2021-05-02 18:38:13,263 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 18:38:13,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 777.9ms TimeCoverageRelationStatistics Valid=953, Invalid=1803, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 18:38:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 18:38:13,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 18:38:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.425) internal successors, (57), 40 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 18:38:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2021-05-02 18:38:13,265 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 42 [2021-05-02 18:38:13,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:13,265 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2021-05-02 18:38:13,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:13,266 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2021-05-02 18:38:13,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 18:38:13,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:13,266 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:13,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 18:38:13,474 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:13,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:13,474 INFO L82 PathProgramCache]: Analyzing trace with hash -192318244, now seen corresponding path program 16 times [2021-05-02 18:38:13,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:13,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261913231] [2021-05-02 18:38:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:13,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:13,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:13,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261913231] [2021-05-02 18:38:13,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261913231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:13,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991628424] [2021-05-02 18:38:13,659 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 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 18:38:13,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:38:13,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:13,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 18:38:13,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:14,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991628424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:14,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:14,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 41 [2021-05-02 18:38:14,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005594392] [2021-05-02 18:38:14,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 18:38:14,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:14,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 18:38:14,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 18:38:14,056 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:38:16,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:16,350 INFO L93 Difference]: Finished difference Result 80 states and 114 transitions. [2021-05-02 18:38:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 18:38:16,351 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-05-02 18:38:16,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:16,351 INFO L225 Difference]: With dead ends: 80 [2021-05-02 18:38:16,351 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 18:38:16,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1989.3ms TimeCoverageRelationStatistics Valid=965, Invalid=4585, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 18:38:16,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 18:38:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 47. [2021-05-02 18:38:16,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 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 18:38:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-05-02 18:38:16,354 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 44 [2021-05-02 18:38:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:16,355 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-05-02 18:38:16,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:38:16,355 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-05-02 18:38:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 18:38:16,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:16,355 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:16,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 18:38:16,569 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:16,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:16,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1946776130, now seen corresponding path program 17 times [2021-05-02 18:38:16,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:16,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4831310] [2021-05-02 18:38:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:16,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:16,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:16,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4831310] [2021-05-02 18:38:16,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4831310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:16,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408207098] [2021-05-02 18:38:16,797 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 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 18:38:16,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 18:38:16,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:16,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 18:38:16,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:16,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:16,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:17,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408207098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:17,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:17,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-05-02 18:38:17,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246294484] [2021-05-02 18:38:17,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 18:38:17,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:17,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 18:38:17,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 18:38:17,178 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 38 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:17,848 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-05-02 18:38:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 18:38:17,849 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 38 states have internal predecessors, (79), 3 states have call successors, (4), 4 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 46 [2021-05-02 18:38:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:17,849 INFO L225 Difference]: With dead ends: 50 [2021-05-02 18:38:17,849 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 18:38:17,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 908.6ms TimeCoverageRelationStatistics Valid=1179, Invalid=2243, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 18:38:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 18:38:17,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-02 18:38:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2021-05-02 18:38:17,852 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 46 [2021-05-02 18:38:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:17,852 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2021-05-02 18:38:17,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 38 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2021-05-02 18:38:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 18:38:17,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:17,853 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:18,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:18,061 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:18,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:18,061 INFO L82 PathProgramCache]: Analyzing trace with hash -58657248, now seen corresponding path program 18 times [2021-05-02 18:38:18,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:18,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844286557] [2021-05-02 18:38:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:18,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:18,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:18,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844286557] [2021-05-02 18:38:18,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844286557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:18,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253351512] [2021-05-02 18:38:18,269 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 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 18:38:18,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 18:38:18,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:18,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 18:38:18,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:18,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:18,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253351512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:18,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:18,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-02 18:38:18,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604248761] [2021-05-02 18:38:18,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 18:38:18,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:18,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 18:38:18,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 18:38:18,668 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 40 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:19,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:19,395 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-05-02 18:38:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 18:38:19,395 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 40 states have internal predecessors, (83), 3 states have call successors, (4), 4 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 48 [2021-05-02 18:38:19,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:19,395 INFO L225 Difference]: With dead ends: 52 [2021-05-02 18:38:19,395 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 18:38:19,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 990.2ms TimeCoverageRelationStatistics Valid=1301, Invalid=2481, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 18:38:19,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 18:38:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 18:38:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 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 18:38:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-05-02 18:38:19,398 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 48 [2021-05-02 18:38:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:19,398 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-05-02 18:38:19,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 40 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-05-02 18:38:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 18:38:19,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:19,399 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:19,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:19,613 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:19,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:19,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1947389442, now seen corresponding path program 19 times [2021-05-02 18:38:19,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:19,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977657085] [2021-05-02 18:38:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:19,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:19,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:19,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977657085] [2021-05-02 18:38:19,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977657085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:19,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55577196] [2021-05-02 18:38:19,842 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 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 18:38:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:19,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 18:38:19,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:19,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:19,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:19,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:19,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:19,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:19,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:19,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:19,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:19,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:19,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:19,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:19,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:19,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:19,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:20,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55577196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:20,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:20,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-05-02 18:38:20,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225365986] [2021-05-02 18:38:20,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 18:38:20,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:20,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 18:38:20,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 18:38:20,258 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 42 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:21,015 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-05-02 18:38:21,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 18:38:21,016 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 42 states have internal predecessors, (87), 3 states have call successors, (4), 4 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 50 [2021-05-02 18:38:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:21,016 INFO L225 Difference]: With dead ends: 54 [2021-05-02 18:38:21,016 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 18:38:21,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1022.3ms TimeCoverageRelationStatistics Valid=1429, Invalid=2731, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 18:38:21,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 18:38:21,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 18:38:21,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.4375) internal successors, (69), 48 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 18:38:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2021-05-02 18:38:21,018 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 50 [2021-05-02 18:38:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:21,018 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2021-05-02 18:38:21,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 42 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:21,019 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2021-05-02 18:38:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 18:38:21,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:21,019 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:21,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:21,234 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1317942628, now seen corresponding path program 20 times [2021-05-02 18:38:21,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:21,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029676491] [2021-05-02 18:38:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:21,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:21,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029676491] [2021-05-02 18:38:21,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029676491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355862616] [2021-05-02 18:38:21,493 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 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 18:38:21,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:38:21,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:21,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 18:38:21,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:21,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:21,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355862616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:21,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:21,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-02 18:38:21,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403766430] [2021-05-02 18:38:21,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 18:38:21,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:21,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 18:38:21,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 18:38:21,908 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 44 states have internal predecessors, (91), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:22,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:22,756 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-05-02 18:38:22,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 18:38:22,757 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 44 states have internal predecessors, (91), 3 states have call successors, (4), 4 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 52 [2021-05-02 18:38:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:22,757 INFO L225 Difference]: With dead ends: 56 [2021-05-02 18:38:22,758 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 18:38:22,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 1103.0ms TimeCoverageRelationStatistics Valid=1563, Invalid=2993, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 18:38:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 18:38:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 18:38:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2021-05-02 18:38:22,760 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 52 [2021-05-02 18:38:22,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:22,760 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2021-05-02 18:38:22,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 44 states have internal predecessors, (91), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:22,760 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2021-05-02 18:38:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 18:38:22,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:22,761 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:22,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 18:38:22,969 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:22,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2009943110, now seen corresponding path program 21 times [2021-05-02 18:38:22,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:22,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826857982] [2021-05-02 18:38:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:23,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:23,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:23,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826857982] [2021-05-02 18:38:23,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826857982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:23,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586079148] [2021-05-02 18:38:23,273 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 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 18:38:23,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 18:38:23,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:23,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 18:38:23,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:23,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:23,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586079148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:23,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:23,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-05-02 18:38:23,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145676691] [2021-05-02 18:38:23,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 18:38:23,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:23,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 18:38:23,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 18:38:23,769 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 46 states have internal predecessors, (95), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:24,639 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-05-02 18:38:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 18:38:24,639 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 46 states have internal predecessors, (95), 3 states have call successors, (4), 4 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 54 [2021-05-02 18:38:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:24,640 INFO L225 Difference]: With dead ends: 58 [2021-05-02 18:38:24,640 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 18:38:24,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1251.9ms TimeCoverageRelationStatistics Valid=1703, Invalid=3267, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 18:38:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 18:38:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 18:38:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 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 18:38:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2021-05-02 18:38:24,642 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 54 [2021-05-02 18:38:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:24,643 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-05-02 18:38:24,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 46 states have internal predecessors, (95), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2021-05-02 18:38:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 18:38:24,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:24,643 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:24,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 18:38:24,860 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:24,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1302475432, now seen corresponding path program 22 times [2021-05-02 18:38:24,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:24,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721523593] [2021-05-02 18:38:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:25,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:25,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:25,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721523593] [2021-05-02 18:38:25,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721523593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:25,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308223151] [2021-05-02 18:38:25,153 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 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 18:38:25,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:38:25,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:25,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 18:38:25,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:25,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308223151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:25,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:25,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 53 [2021-05-02 18:38:25,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716355661] [2021-05-02 18:38:25,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 18:38:25,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:25,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 18:38:25,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2397, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 18:38:25,800 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 53 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:38:29,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:29,214 INFO L93 Difference]: Finished difference Result 104 states and 150 transitions. [2021-05-02 18:38:29,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 18:38:29,215 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2021-05-02 18:38:29,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:29,215 INFO L225 Difference]: With dead ends: 104 [2021-05-02 18:38:29,215 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 18:38:29,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 3111.8ms TimeCoverageRelationStatistics Valid=1646, Invalid=8056, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 18:38:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 18:38:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 59. [2021-05-02 18:38:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 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 18:38:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2021-05-02 18:38:29,218 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 56 [2021-05-02 18:38:29,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:29,218 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2021-05-02 18:38:29,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:38:29,218 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2021-05-02 18:38:29,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 18:38:29,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:29,218 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:29,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:29,429 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:29,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:29,429 INFO L82 PathProgramCache]: Analyzing trace with hash 30869642, now seen corresponding path program 23 times [2021-05-02 18:38:29,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:29,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718191411] [2021-05-02 18:38:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:29,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:29,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:29,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718191411] [2021-05-02 18:38:29,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718191411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:29,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740723162] [2021-05-02 18:38:29,753 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 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 18:38:29,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-02 18:38:29,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:29,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 18:38:29,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:29,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:29,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:30,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740723162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:30,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:30,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-05-02 18:38:30,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919199585] [2021-05-02 18:38:30,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 18:38:30,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:30,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 18:38:30,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 18:38:30,274 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 50 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:31,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:31,243 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2021-05-02 18:38:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 18:38:31,244 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 50 states have internal predecessors, (103), 3 states have call successors, (4), 4 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 58 [2021-05-02 18:38:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:31,244 INFO L225 Difference]: With dead ends: 62 [2021-05-02 18:38:31,244 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 18:38:31,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 1357.0ms TimeCoverageRelationStatistics Valid=2001, Invalid=3851, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 18:38:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 18:38:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 18:38:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2021-05-02 18:38:31,246 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 58 [2021-05-02 18:38:31,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:31,246 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2021-05-02 18:38:31,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 50 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2021-05-02 18:38:31,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 18:38:31,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:31,247 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:31,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 18:38:31,455 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:31,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:31,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2083384812, now seen corresponding path program 24 times [2021-05-02 18:38:31,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:31,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344458976] [2021-05-02 18:38:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:31,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:31,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:31,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344458976] [2021-05-02 18:38:31,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344458976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:31,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115826791] [2021-05-02 18:38:31,809 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 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 18:38:31,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 18:38:31,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:31,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 18:38:31,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:31,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:31,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:32,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115826791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:32,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:32,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-05-02 18:38:32,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456776988] [2021-05-02 18:38:32,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 18:38:32,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:32,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 18:38:32,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 18:38:32,382 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 52 states have internal predecessors, (107), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:33,428 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-05-02 18:38:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 18:38:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 52 states have internal predecessors, (107), 3 states have call successors, (4), 4 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 60 [2021-05-02 18:38:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:33,429 INFO L225 Difference]: With dead ends: 64 [2021-05-02 18:38:33,429 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 18:38:33,429 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 1486.2ms TimeCoverageRelationStatistics Valid=2159, Invalid=4161, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 18:38:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 18:38:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 18:38:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 58 states have internal predecessors, (84), 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 18:38:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2021-05-02 18:38:33,431 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 60 [2021-05-02 18:38:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:33,431 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2021-05-02 18:38:33,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 52 states have internal predecessors, (107), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2021-05-02 18:38:33,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 18:38:33,432 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:33,432 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:33,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:33,642 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1134492978, now seen corresponding path program 25 times [2021-05-02 18:38:33,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:33,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385842743] [2021-05-02 18:38:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:34,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:34,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:34,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385842743] [2021-05-02 18:38:34,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385842743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:34,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224147959] [2021-05-02 18:38:34,067 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 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 18:38:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:34,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 18:38:34,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:34,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:34,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224147959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:34,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:34,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2021-05-02 18:38:34,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294726973] [2021-05-02 18:38:34,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 18:38:34,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:34,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 18:38:34,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:38:34,666 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 54 states have internal predecessors, (111), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:35,738 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2021-05-02 18:38:35,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 18:38:35,739 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 54 states have internal predecessors, (111), 3 states have call successors, (4), 4 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 62 [2021-05-02 18:38:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:35,739 INFO L225 Difference]: With dead ends: 66 [2021-05-02 18:38:35,740 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 18:38:35,740 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 1634.0ms TimeCoverageRelationStatistics Valid=2323, Invalid=4483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 18:38:35,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 18:38:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-02 18:38:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.45) internal successors, (87), 60 states have internal predecessors, (87), 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 18:38:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2021-05-02 18:38:35,742 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 62 [2021-05-02 18:38:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:35,742 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2021-05-02 18:38:35,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 54 states have internal predecessors, (111), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2021-05-02 18:38:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 18:38:35,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:35,742 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:35,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 18:38:35,943 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:35,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1138596048, now seen corresponding path program 26 times [2021-05-02 18:38:35,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:35,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172869958] [2021-05-02 18:38:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:36,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:36,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:36,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172869958] [2021-05-02 18:38:36,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172869958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:36,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633944677] [2021-05-02 18:38:36,355 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 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 18:38:36,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:38:36,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:36,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 18:38:36,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:36,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:36,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633944677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:36,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:36,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-05-02 18:38:36,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934403549] [2021-05-02 18:38:36,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 18:38:36,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:36,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 18:38:36,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 18:38:36,982 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 56 states have internal predecessors, (115), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:38,162 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2021-05-02 18:38:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 18:38:38,163 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 56 states have internal predecessors, (115), 3 states have call successors, (4), 4 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 64 [2021-05-02 18:38:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:38,163 INFO L225 Difference]: With dead ends: 68 [2021-05-02 18:38:38,163 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 18:38:38,164 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 1715.9ms TimeCoverageRelationStatistics Valid=2493, Invalid=4817, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 18:38:38,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 18:38:38,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-02 18:38:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2021-05-02 18:38:38,166 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 64 [2021-05-02 18:38:38,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:38,166 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2021-05-02 18:38:38,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 56 states have internal predecessors, (115), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2021-05-02 18:38:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 18:38:38,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:38,166 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:38,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 18:38:38,381 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash -786679022, now seen corresponding path program 27 times [2021-05-02 18:38:38,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:38,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441847648] [2021-05-02 18:38:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:38,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:38,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:38,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441847648] [2021-05-02 18:38:38,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441847648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:38,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395458677] [2021-05-02 18:38:38,773 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 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 18:38:38,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 18:38:38,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:38,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 18:38:38,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:38,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:38,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:39,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395458677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:39,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:39,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2021-05-02 18:38:39,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859527587] [2021-05-02 18:38:39,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 18:38:39,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:39,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 18:38:39,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 18:38:39,411 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 58 states have internal predecessors, (119), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:40,609 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2021-05-02 18:38:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 18:38:40,609 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 58 states have internal predecessors, (119), 3 states have call successors, (4), 4 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 66 [2021-05-02 18:38:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:40,610 INFO L225 Difference]: With dead ends: 70 [2021-05-02 18:38:40,610 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 18:38:40,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 1700.0ms TimeCoverageRelationStatistics Valid=2669, Invalid=5163, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 18:38:40,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 18:38:40,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-02 18:38:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 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 18:38:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2021-05-02 18:38:40,612 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 66 [2021-05-02 18:38:40,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:40,612 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2021-05-02 18:38:40,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 58 states have internal predecessors, (119), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:40,612 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2021-05-02 18:38:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 18:38:40,613 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:40,613 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:40,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 18:38:40,828 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:40,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1896833420, now seen corresponding path program 28 times [2021-05-02 18:38:40,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:40,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586984211] [2021-05-02 18:38:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:41,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:41,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:41,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586984211] [2021-05-02 18:38:41,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586984211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:41,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113471672] [2021-05-02 18:38:41,241 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 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 18:38:41,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:38:41,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:41,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 18:38:41,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:42,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113471672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:42,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:42,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 34] total 65 [2021-05-02 18:38:42,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560566880] [2021-05-02 18:38:42,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 18:38:42,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 18:38:42,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=3624, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 18:38:42,161 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand has 65 states, 64 states have (on average 1.984375) internal successors, (127), 63 states have internal predecessors, (127), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:38:47,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:47,298 INFO L93 Difference]: Finished difference Result 128 states and 186 transitions. [2021-05-02 18:38:47,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 18:38:47,299 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.984375) internal successors, (127), 63 states have internal predecessors, (127), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 68 [2021-05-02 18:38:47,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:47,299 INFO L225 Difference]: With dead ends: 128 [2021-05-02 18:38:47,299 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 18:38:47,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2670 ImplicationChecksByTransitivity, 4522.4ms TimeCoverageRelationStatistics Valid=2507, Invalid=12499, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 18:38:47,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 18:38:47,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 71. [2021-05-02 18:38:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 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 18:38:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2021-05-02 18:38:47,302 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 68 [2021-05-02 18:38:47,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:47,302 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2021-05-02 18:38:47,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 64 states have (on average 1.984375) internal successors, (127), 63 states have internal predecessors, (127), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:38:47,302 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2021-05-02 18:38:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 18:38:47,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:47,302 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:47,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:47,517 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:47,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:47,517 INFO L82 PathProgramCache]: Analyzing trace with hash 691646806, now seen corresponding path program 29 times [2021-05-02 18:38:47,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:47,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606296690] [2021-05-02 18:38:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:47,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:47,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:47,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606296690] [2021-05-02 18:38:47,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606296690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:47,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558198081] [2021-05-02 18:38:47,982 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 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 18:38:48,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-02 18:38:48,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:48,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 18:38:48,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:48,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:48,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558198081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:48,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:48,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2021-05-02 18:38:48,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369990614] [2021-05-02 18:38:48,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 18:38:48,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:48,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 18:38:48,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 18:38:48,707 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 64 states, 64 states have (on average 1.984375) internal successors, (127), 62 states have internal predecessors, (127), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:49,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:49,942 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2021-05-02 18:38:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 18:38:49,943 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 62 states have internal predecessors, (127), 3 states have call successors, (4), 4 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 70 [2021-05-02 18:38:49,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:49,943 INFO L225 Difference]: With dead ends: 74 [2021-05-02 18:38:49,943 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 18:38:49,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 1947.4ms TimeCoverageRelationStatistics Valid=3039, Invalid=5891, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 18:38:49,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 18:38:49,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-02 18:38:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 68 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2021-05-02 18:38:49,945 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 70 [2021-05-02 18:38:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:49,945 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2021-05-02 18:38:49,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 62 states have internal predecessors, (127), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2021-05-02 18:38:49,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 18:38:49,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:49,946 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:50,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-02 18:38:50,161 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:50,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:50,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1435079608, now seen corresponding path program 30 times [2021-05-02 18:38:50,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:50,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12607160] [2021-05-02 18:38:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:50,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:50,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:50,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12607160] [2021-05-02 18:38:50,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12607160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:50,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459536161] [2021-05-02 18:38:50,666 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 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 18:38:50,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 18:38:50,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:50,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 18:38:50,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:50,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:50,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:51,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459536161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:51,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:51,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-05-02 18:38:51,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088143975] [2021-05-02 18:38:51,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 18:38:51,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:51,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 18:38:51,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 18:38:51,418 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 64 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:52,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:52,928 INFO L93 Difference]: Finished difference Result 76 states and 108 transitions. [2021-05-02 18:38:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 18:38:52,928 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 64 states have internal predecessors, (131), 3 states have call successors, (4), 4 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 72 [2021-05-02 18:38:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:52,929 INFO L225 Difference]: With dead ends: 76 [2021-05-02 18:38:52,929 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 18:38:52,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 2131.1ms TimeCoverageRelationStatistics Valid=3233, Invalid=6273, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 18:38:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 18:38:52,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 18:38:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.457142857142857) internal successors, (102), 70 states have internal predecessors, (102), 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 18:38:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2021-05-02 18:38:52,931 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 72 [2021-05-02 18:38:52,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:52,931 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2021-05-02 18:38:52,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 64 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:52,932 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2021-05-02 18:38:52,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 18:38:52,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:52,932 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:53,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:38:53,141 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:53,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1385536102, now seen corresponding path program 31 times [2021-05-02 18:38:53,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:53,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749771042] [2021-05-02 18:38:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:53,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:53,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:53,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749771042] [2021-05-02 18:38:53,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749771042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:53,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125690426] [2021-05-02 18:38:53,697 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 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 18:38:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:53,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 18:38:53,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:53,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:53,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:54,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125690426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:54,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:54,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2021-05-02 18:38:54,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512648763] [2021-05-02 18:38:54,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 18:38:54,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:54,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 18:38:54,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 18:38:54,518 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 66 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:56,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:56,030 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2021-05-02 18:38:56,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 18:38:56,031 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 66 states have internal predecessors, (135), 3 states have call successors, (4), 4 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 74 [2021-05-02 18:38:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:56,031 INFO L225 Difference]: With dead ends: 78 [2021-05-02 18:38:56,031 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 18:38:56,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3036 ImplicationChecksByTransitivity, 2250.5ms TimeCoverageRelationStatistics Valid=3433, Invalid=6667, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 18:38:56,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 18:38:56,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-02 18:38:56,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 72 states have internal predecessors, (105), 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 18:38:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2021-05-02 18:38:56,033 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 74 [2021-05-02 18:38:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:56,034 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2021-05-02 18:38:56,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 66 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2021-05-02 18:38:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 18:38:56,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:56,034 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:56,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 18:38:56,235 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:56,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1872869636, now seen corresponding path program 32 times [2021-05-02 18:38:56,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:56,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092451150] [2021-05-02 18:38:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:56,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:56,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:56,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092451150] [2021-05-02 18:38:56,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092451150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:56,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775912859] [2021-05-02 18:38:56,814 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 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 18:38:56,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:38:56,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:38:56,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 18:38:56,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:38:56,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:56,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:38:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:57,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775912859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:57,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:38:57,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-05-02 18:38:57,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442148503] [2021-05-02 18:38:57,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 18:38:57,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:38:57,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 18:38:57,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1820, Invalid=3010, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 18:38:57,637 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 68 states have internal predecessors, (139), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:59,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:38:59,165 INFO L93 Difference]: Finished difference Result 80 states and 114 transitions. [2021-05-02 18:38:59,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 18:38:59,165 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 68 states have internal predecessors, (139), 3 states have call successors, (4), 4 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 76 [2021-05-02 18:38:59,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:38:59,166 INFO L225 Difference]: With dead ends: 80 [2021-05-02 18:38:59,166 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 18:38:59,166 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3230 ImplicationChecksByTransitivity, 2294.4ms TimeCoverageRelationStatistics Valid=3639, Invalid=7073, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 18:38:59,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 18:38:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-02 18:38:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 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 18:38:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2021-05-02 18:38:59,168 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 76 [2021-05-02 18:38:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:38:59,168 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2021-05-02 18:38:59,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 68 states have internal predecessors, (139), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:38:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2021-05-02 18:38:59,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 18:38:59,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:38:59,168 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:38:59,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 18:38:59,377 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:38:59,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:38:59,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2048960546, now seen corresponding path program 33 times [2021-05-02 18:38:59,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:38:59,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168574283] [2021-05-02 18:38:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:38:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:59,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:38:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:38:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:38:59,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:38:59,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168574283] [2021-05-02 18:38:59,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168574283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:38:59,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601099209] [2021-05-02 18:38:59,937 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 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 18:39:00,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-02 18:39:00,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:39:00,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 18:39:00,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:39:00,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:00,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601099209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:00,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:39:00,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2021-05-02 18:39:00,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397894439] [2021-05-02 18:39:00,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 18:39:00,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:39:00,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 18:39:00,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1926, Invalid=3186, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 18:39:00,780 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 70 states have internal predecessors, (143), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:39:02,377 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2021-05-02 18:39:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 18:39:02,378 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 70 states have internal predecessors, (143), 3 states have call successors, (4), 4 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 78 [2021-05-02 18:39:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:39:02,378 INFO L225 Difference]: With dead ends: 82 [2021-05-02 18:39:02,378 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 18:39:02,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3430 ImplicationChecksByTransitivity, 2337.8ms TimeCoverageRelationStatistics Valid=3851, Invalid=7491, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 18:39:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 18:39:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-02 18:39:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 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 18:39:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2021-05-02 18:39:02,381 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 78 [2021-05-02 18:39:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:39:02,381 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2021-05-02 18:39:02,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 70 states have internal predecessors, (143), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:02,381 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2021-05-02 18:39:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 18:39:02,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:39:02,381 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:39:02,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 18:39:02,599 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:39:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:39:02,599 INFO L82 PathProgramCache]: Analyzing trace with hash 526366784, now seen corresponding path program 34 times [2021-05-02 18:39:02,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:39:02,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550826351] [2021-05-02 18:39:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:39:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:03,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:39:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:03,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:39:03,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550826351] [2021-05-02 18:39:03,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550826351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:03,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489319319] [2021-05-02 18:39:03,238 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 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 18:39:03,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:39:03,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:39:03,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 78 conjunts are in the unsatisfiable core [2021-05-02 18:39:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:39:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:04,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489319319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:04,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:39:04,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 40] total 77 [2021-05-02 18:39:04,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821162913] [2021-05-02 18:39:04,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 18:39:04,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:39:04,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 18:39:04,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=5103, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 18:39:04,492 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 states have internal predecessors, (151), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:39:11,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:39:11,167 INFO L93 Difference]: Finished difference Result 152 states and 222 transitions. [2021-05-02 18:39:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 18:39:11,168 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 states have internal predecessors, (151), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 80 [2021-05-02 18:39:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:39:11,168 INFO L225 Difference]: With dead ends: 152 [2021-05-02 18:39:11,168 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 18:39:11,169 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3852 ImplicationChecksByTransitivity, 6159.2ms TimeCoverageRelationStatistics Valid=3548, Invalid=17914, Unknown=0, NotChecked=0, Total=21462 [2021-05-02 18:39:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 18:39:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 83. [2021-05-02 18:39:11,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 78 states have internal predecessors, (114), 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 18:39:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2021-05-02 18:39:11,171 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 80 [2021-05-02 18:39:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:39:11,171 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2021-05-02 18:39:11,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 states have internal predecessors, (151), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:39:11,171 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2021-05-02 18:39:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 18:39:11,171 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:39:11,171 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:39:11,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 18:39:11,380 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:39:11,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:39:11,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1514768418, now seen corresponding path program 35 times [2021-05-02 18:39:11,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:39:11,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725118847] [2021-05-02 18:39:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:39:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:12,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:39:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:12,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:39:12,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725118847] [2021-05-02 18:39:12,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725118847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:12,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015498842] [2021-05-02 18:39:12,024 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 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 18:39:12,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-05-02 18:39:12,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:39:12,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 18:39:12,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:39:12,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:12,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015498842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:12,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:39:12,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2021-05-02 18:39:12,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702050467] [2021-05-02 18:39:12,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 18:39:12,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:39:12,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 18:39:12,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=3553, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 18:39:12,956 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 74 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:39:14,755 INFO L93 Difference]: Finished difference Result 86 states and 123 transitions. [2021-05-02 18:39:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 18:39:14,756 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 74 states have internal predecessors, (151), 3 states have call successors, (4), 4 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 82 [2021-05-02 18:39:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:39:14,756 INFO L225 Difference]: With dead ends: 86 [2021-05-02 18:39:14,756 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 18:39:14,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3848 ImplicationChecksByTransitivity, 2706.9ms TimeCoverageRelationStatistics Valid=4293, Invalid=8363, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 18:39:14,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 18:39:14,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 18:39:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:14,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2021-05-02 18:39:14,759 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 82 [2021-05-02 18:39:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:39:14,759 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2021-05-02 18:39:14,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 74 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2021-05-02 18:39:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 18:39:14,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:39:14,759 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:39:14,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 18:39:14,966 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:39:14,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:39:14,966 INFO L82 PathProgramCache]: Analyzing trace with hash -2114001020, now seen corresponding path program 36 times [2021-05-02 18:39:14,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:39:14,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872992534] [2021-05-02 18:39:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:39:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:15,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:39:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:15,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:39:15,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872992534] [2021-05-02 18:39:15,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872992534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:15,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171502707] [2021-05-02 18:39:15,624 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 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 18:39:15,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-02 18:39:15,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:39:15,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 18:39:15,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:39:15,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:15,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:16,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171502707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:16,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:39:16,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2021-05-02 18:39:16,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926973005] [2021-05-02 18:39:16,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 18:39:16,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:39:16,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 18:39:16,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2262, Invalid=3744, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 18:39:16,645 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 76 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:18,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:39:18,464 INFO L93 Difference]: Finished difference Result 88 states and 126 transitions. [2021-05-02 18:39:18,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 18:39:18,464 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 76 states have internal predecessors, (155), 3 states have call successors, (4), 4 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 84 [2021-05-02 18:39:18,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:39:18,465 INFO L225 Difference]: With dead ends: 88 [2021-05-02 18:39:18,465 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 18:39:18,465 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4066 ImplicationChecksByTransitivity, 2806.8ms TimeCoverageRelationStatistics Valid=4523, Invalid=8817, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 18:39:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 18:39:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-02 18:39:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 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 18:39:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2021-05-02 18:39:18,467 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 84 [2021-05-02 18:39:18,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:39:18,467 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2021-05-02 18:39:18,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 76 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:18,467 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2021-05-02 18:39:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 18:39:18,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:39:18,468 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:39:18,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 18:39:18,683 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:39:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:39:18,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1847986586, now seen corresponding path program 37 times [2021-05-02 18:39:18,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:39:18,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482632859] [2021-05-02 18:39:18,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:39:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:19,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:39:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:19,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:39:19,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482632859] [2021-05-02 18:39:19,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482632859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:19,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131313556] [2021-05-02 18:39:19,465 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 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 18:39:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:19,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 18:39:19,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:39:19,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:19,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:20,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131313556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:20,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:39:20,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2021-05-02 18:39:20,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131240087] [2021-05-02 18:39:20,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 18:39:20,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:39:20,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 18:39:20,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2380, Invalid=3940, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 18:39:20,472 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 80 states, 80 states have (on average 1.9875) internal successors, (159), 78 states have internal predecessors, (159), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:22,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:39:22,403 INFO L93 Difference]: Finished difference Result 90 states and 129 transitions. [2021-05-02 18:39:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 18:39:22,404 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 78 states have internal predecessors, (159), 3 states have call successors, (4), 4 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 86 [2021-05-02 18:39:22,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:39:22,404 INFO L225 Difference]: With dead ends: 90 [2021-05-02 18:39:22,404 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 18:39:22,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 3013.2ms TimeCoverageRelationStatistics Valid=4759, Invalid=9283, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 18:39:22,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 18:39:22,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-02 18:39:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 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 18:39:22,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2021-05-02 18:39:22,418 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 86 [2021-05-02 18:39:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:39:22,418 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2021-05-02 18:39:22,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 78 states have internal predecessors, (159), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:22,419 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2021-05-02 18:39:22,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 18:39:22,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:39:22,419 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:39:22,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 18:39:22,620 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:39:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:39:22,620 INFO L82 PathProgramCache]: Analyzing trace with hash 388814024, now seen corresponding path program 38 times [2021-05-02 18:39:22,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:39:22,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276473306] [2021-05-02 18:39:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:39:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:23,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:39:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:23,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:39:23,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276473306] [2021-05-02 18:39:23,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276473306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:23,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763070588] [2021-05-02 18:39:23,370 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 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 18:39:23,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:39:23,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:39:23,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 18:39:23,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:39:23,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:23,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:24,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763070588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:24,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:39:24,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-05-02 18:39:24,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344604104] [2021-05-02 18:39:24,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 18:39:24,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:39:24,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 18:39:24,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=4141, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 18:39:24,424 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 80 states have internal predecessors, (163), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:26,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:39:26,338 INFO L93 Difference]: Finished difference Result 92 states and 132 transitions. [2021-05-02 18:39:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 18:39:26,338 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 80 states have internal predecessors, (163), 3 states have call successors, (4), 4 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 88 [2021-05-02 18:39:26,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:39:26,339 INFO L225 Difference]: With dead ends: 92 [2021-05-02 18:39:26,339 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 18:39:26,340 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4520 ImplicationChecksByTransitivity, 3097.4ms TimeCoverageRelationStatistics Valid=5001, Invalid=9761, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 18:39:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 18:39:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-02 18:39:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2021-05-02 18:39:26,341 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 88 [2021-05-02 18:39:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:39:26,342 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2021-05-02 18:39:26,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 80 states have internal predecessors, (163), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2021-05-02 18:39:26,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 18:39:26,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:39:26,342 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:39:26,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 18:39:26,557 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:39:26,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:39:26,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1824415062, now seen corresponding path program 39 times [2021-05-02 18:39:26,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:39:26,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57477690] [2021-05-02 18:39:26,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:39:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:27,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:39:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:27,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:39:27,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57477690] [2021-05-02 18:39:27,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57477690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:27,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348024935] [2021-05-02 18:39:27,336 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 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 18:39:27,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-02 18:39:27,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:39:27,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 18:39:27,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:39:27,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:27,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:28,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348024935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:28,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:39:28,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 84 [2021-05-02 18:39:28,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293120371] [2021-05-02 18:39:28,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 18:39:28,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:39:28,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 18:39:28,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2625, Invalid=4347, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 18:39:28,517 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 82 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:39:30,543 INFO L93 Difference]: Finished difference Result 94 states and 135 transitions. [2021-05-02 18:39:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 18:39:30,543 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 82 states have internal predecessors, (167), 3 states have call successors, (4), 4 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 90 [2021-05-02 18:39:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:39:30,544 INFO L225 Difference]: With dead ends: 94 [2021-05-02 18:39:30,544 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 18:39:30,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4756 ImplicationChecksByTransitivity, 3212.2ms TimeCoverageRelationStatistics Valid=5249, Invalid=10251, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 18:39:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 18:39:30,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-02 18:39:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.4659090909090908) internal successors, (129), 88 states have internal predecessors, (129), 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 18:39:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2021-05-02 18:39:30,546 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 90 [2021-05-02 18:39:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:39:30,546 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2021-05-02 18:39:30,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 82 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2021-05-02 18:39:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 18:39:30,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:39:30,547 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:39:30,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:39:30,757 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:39:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:39:30,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1566212108, now seen corresponding path program 40 times [2021-05-02 18:39:30,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:39:30,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46014155] [2021-05-02 18:39:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:39:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:31,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:39:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:31,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:39:31,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46014155] [2021-05-02 18:39:31,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46014155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:31,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842735046] [2021-05-02 18:39:31,570 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 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 18:39:31,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:39:31,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:39:31,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 90 conjunts are in the unsatisfiable core [2021-05-02 18:39:31,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:39:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:33,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842735046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:33,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:39:33,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 46] total 89 [2021-05-02 18:39:33,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868172937] [2021-05-02 18:39:33,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 18:39:33,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:39:33,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 18:39:33,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=6834, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 18:39:33,293 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand has 89 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 states have internal predecessors, (175), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:39:42,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:39:42,880 INFO L93 Difference]: Finished difference Result 176 states and 258 transitions. [2021-05-02 18:39:42,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 18:39:42,880 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 states have internal predecessors, (175), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 92 [2021-05-02 18:39:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:39:42,881 INFO L225 Difference]: With dead ends: 176 [2021-05-02 18:39:42,881 INFO L226 Difference]: Without dead ends: 176 [2021-05-02 18:39:42,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5250 ImplicationChecksByTransitivity, 8377.3ms TimeCoverageRelationStatistics Valid=4769, Invalid=24301, Unknown=0, NotChecked=0, Total=29070 [2021-05-02 18:39:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-02 18:39:42,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 95. [2021-05-02 18:39:42,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 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 18:39:42,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2021-05-02 18:39:42,884 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 92 [2021-05-02 18:39:42,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:39:42,884 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2021-05-02 18:39:42,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 states have internal predecessors, (175), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:39:42,884 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2021-05-02 18:39:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 18:39:42,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:39:42,885 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:39:43,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:39:43,100 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:39:43,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:39:43,100 INFO L82 PathProgramCache]: Analyzing trace with hash 78744814, now seen corresponding path program 41 times [2021-05-02 18:39:43,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:39:43,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343053522] [2021-05-02 18:39:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:39:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:43,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:39:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:43,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:39:43,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343053522] [2021-05-02 18:39:43,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343053522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:43,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063821263] [2021-05-02 18:39:43,942 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 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 18:39:44,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-05-02 18:39:44,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:39:44,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 18:39:44,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:39:44,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:44,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:45,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:45,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:45,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:45,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:45,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:45,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:45,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:45,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063821263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:45,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:39:45,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2021-05-02 18:39:45,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304089361] [2021-05-02 18:39:45,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 18:39:45,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:39:45,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 18:39:45,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2882, Invalid=4774, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 18:39:45,168 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 86 states have internal predecessors, (175), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:47,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:39:47,322 INFO L93 Difference]: Finished difference Result 98 states and 141 transitions. [2021-05-02 18:39:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 18:39:47,322 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 86 states have internal predecessors, (175), 3 states have call successors, (4), 4 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 94 [2021-05-02 18:39:47,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:39:47,323 INFO L225 Difference]: With dead ends: 98 [2021-05-02 18:39:47,323 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 18:39:47,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5246 ImplicationChecksByTransitivity, 3555.7ms TimeCoverageRelationStatistics Valid=5763, Invalid=11267, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 18:39:47,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 18:39:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-02 18:39:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2021-05-02 18:39:47,326 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 94 [2021-05-02 18:39:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:39:47,326 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2021-05-02 18:39:47,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 86 states have internal predecessors, (175), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2021-05-02 18:39:47,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 18:39:47,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:39:47,327 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:39:47,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-02 18:39:47,541 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:39:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:39:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash 846784848, now seen corresponding path program 42 times [2021-05-02 18:39:47,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:39:47,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130015500] [2021-05-02 18:39:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:39:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:48,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:39:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:48,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:39:48,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130015500] [2021-05-02 18:39:48,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130015500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:48,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805172995] [2021-05-02 18:39:48,459 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 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 18:39:48,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-02 18:39:48,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:39:48,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 18:39:48,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:39:48,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:48,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:49,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805172995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:49,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:39:49,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2021-05-02 18:39:49,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632807708] [2021-05-02 18:39:49,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 18:39:49,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:39:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 18:39:49,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3015, Invalid=4995, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 18:39:49,749 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 88 states have internal predecessors, (179), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:52,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:39:52,025 INFO L93 Difference]: Finished difference Result 100 states and 144 transitions. [2021-05-02 18:39:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 18:39:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 88 states have internal predecessors, (179), 3 states have call successors, (4), 4 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 96 [2021-05-02 18:39:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:39:52,027 INFO L225 Difference]: With dead ends: 100 [2021-05-02 18:39:52,027 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 18:39:52,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5500 ImplicationChecksByTransitivity, 3753.8ms TimeCoverageRelationStatistics Valid=6029, Invalid=11793, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 18:39:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 18:39:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-02 18:39:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 94 states have internal predecessors, (138), 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 18:39:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2021-05-02 18:39:52,029 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 96 [2021-05-02 18:39:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:39:52,029 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2021-05-02 18:39:52,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 88 states have internal predecessors, (179), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2021-05-02 18:39:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 18:39:52,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:39:52,030 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:39:52,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:39:52,247 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:39:52,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:39:52,247 INFO L82 PathProgramCache]: Analyzing trace with hash 198882610, now seen corresponding path program 43 times [2021-05-02 18:39:52,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:39:52,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324407224] [2021-05-02 18:39:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:39:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:53,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:39:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:53,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:39:53,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324407224] [2021-05-02 18:39:53,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324407224] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:53,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007655766] [2021-05-02 18:39:53,196 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 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 18:39:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:53,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 18:39:53,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:39:53,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:53,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:54,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007655766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:54,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:39:54,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2021-05-02 18:39:54,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849829432] [2021-05-02 18:39:54,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 18:39:54,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:39:54,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 18:39:54,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3151, Invalid=5221, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 18:39:54,546 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 90 states have internal predecessors, (183), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:39:57,041 INFO L93 Difference]: Finished difference Result 102 states and 147 transitions. [2021-05-02 18:39:57,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 18:39:57,042 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 90 states have internal predecessors, (183), 3 states have call successors, (4), 4 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 98 [2021-05-02 18:39:57,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:39:57,042 INFO L225 Difference]: With dead ends: 102 [2021-05-02 18:39:57,043 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 18:39:57,043 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5760 ImplicationChecksByTransitivity, 3939.7ms TimeCoverageRelationStatistics Valid=6301, Invalid=12331, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 18:39:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 18:39:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 18:39:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 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 18:39:57,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2021-05-02 18:39:57,045 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 98 [2021-05-02 18:39:57,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:39:57,045 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2021-05-02 18:39:57,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 90 states have internal predecessors, (183), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:39:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2021-05-02 18:39:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 18:39:57,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:39:57,046 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:39:57,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:39:57,254 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:39:57,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:39:57,254 INFO L82 PathProgramCache]: Analyzing trace with hash 335089812, now seen corresponding path program 44 times [2021-05-02 18:39:57,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:39:57,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767121495] [2021-05-02 18:39:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:39:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:58,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:39:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:39:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:58,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:39:58,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767121495] [2021-05-02 18:39:58,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767121495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:58,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819307085] [2021-05-02 18:39:58,252 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 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 18:39:58,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:39:58,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:39:58,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 18:39:58,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:39:58,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:58,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:39:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:39:59,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819307085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:39:59,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:39:59,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2021-05-02 18:39:59,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008660429] [2021-05-02 18:39:59,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 18:39:59,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:39:59,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 18:39:59,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3290, Invalid=5452, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 18:39:59,668 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 92 states have internal predecessors, (187), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:02,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:40:02,286 INFO L93 Difference]: Finished difference Result 104 states and 150 transitions. [2021-05-02 18:40:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 18:40:02,287 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 92 states have internal predecessors, (187), 3 states have call successors, (4), 4 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 100 [2021-05-02 18:40:02,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:40:02,287 INFO L225 Difference]: With dead ends: 104 [2021-05-02 18:40:02,287 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 18:40:02,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6026 ImplicationChecksByTransitivity, 4116.5ms TimeCoverageRelationStatistics Valid=6579, Invalid=12881, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 18:40:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 18:40:02,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 18:40:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 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 18:40:02,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2021-05-02 18:40:02,293 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 100 [2021-05-02 18:40:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:40:02,294 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2021-05-02 18:40:02,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 92 states have internal predecessors, (187), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2021-05-02 18:40:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 18:40:02,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:40:02,294 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:40:02,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 18:40:02,498 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:40:02,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:40:02,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1913775242, now seen corresponding path program 45 times [2021-05-02 18:40:02,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:40:02,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752572692] [2021-05-02 18:40:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:40:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:03,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:40:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:03,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:40:03,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752572692] [2021-05-02 18:40:03,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752572692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:03,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715474812] [2021-05-02 18:40:03,674 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 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 18:40:03,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-05-02 18:40:03,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:40:03,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 18:40:03,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:40:03,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:03,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:04,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:05,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:05,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:05,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:05,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:05,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:05,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:05,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:05,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:05,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:05,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:05,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:05,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715474812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:05,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:40:05,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2021-05-02 18:40:05,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146020260] [2021-05-02 18:40:05,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 18:40:05,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:40:05,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 18:40:05,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3432, Invalid=5688, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 18:40:05,312 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 94 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:40:08,014 INFO L93 Difference]: Finished difference Result 106 states and 153 transitions. [2021-05-02 18:40:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 18:40:08,014 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 94 states have internal predecessors, (191), 3 states have call successors, (4), 4 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 102 [2021-05-02 18:40:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:40:08,015 INFO L225 Difference]: With dead ends: 106 [2021-05-02 18:40:08,015 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 18:40:08,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6298 ImplicationChecksByTransitivity, 4642.0ms TimeCoverageRelationStatistics Valid=6863, Invalid=13443, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 18:40:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 18:40:08,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-02 18:40:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 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 18:40:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2021-05-02 18:40:08,018 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 102 [2021-05-02 18:40:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:40:08,018 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2021-05-02 18:40:08,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 94 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2021-05-02 18:40:08,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 18:40:08,018 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:40:08,018 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:40:08,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 18:40:08,229 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:40:08,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:40:08,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1590425048, now seen corresponding path program 46 times [2021-05-02 18:40:08,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:40:08,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562908937] [2021-05-02 18:40:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:40:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:09,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:40:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:09,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:40:09,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562908937] [2021-05-02 18:40:09,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562908937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:09,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612458064] [2021-05-02 18:40:09,333 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 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 18:40:09,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:40:09,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:40:09,374 WARN L261 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 102 conjunts are in the unsatisfiable core [2021-05-02 18:40:09,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:40:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:11,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612458064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:11,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:40:11,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 52] total 101 [2021-05-02 18:40:11,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112403371] [2021-05-02 18:40:11,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 18:40:11,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:40:11,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 18:40:11,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=8817, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 18:40:11,655 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 101 states, 100 states have (on average 1.99) internal successors, (199), 99 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:40:24,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:40:24,968 INFO L93 Difference]: Finished difference Result 200 states and 294 transitions. [2021-05-02 18:40:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 18:40:24,968 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 1.99) internal successors, (199), 99 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 104 [2021-05-02 18:40:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:40:24,969 INFO L225 Difference]: With dead ends: 200 [2021-05-02 18:40:24,969 INFO L226 Difference]: Without dead ends: 200 [2021-05-02 18:40:24,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6864 ImplicationChecksByTransitivity, 11402.2ms TimeCoverageRelationStatistics Valid=6170, Invalid=31660, Unknown=0, NotChecked=0, Total=37830 [2021-05-02 18:40:24,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-02 18:40:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 107. [2021-05-02 18:40:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 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 18:40:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2021-05-02 18:40:24,973 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 104 [2021-05-02 18:40:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:40:24,973 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2021-05-02 18:40:24,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 100 states have (on average 1.99) internal successors, (199), 99 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:40:24,973 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2021-05-02 18:40:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 18:40:24,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:40:24,974 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:40:25,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 18:40:25,189 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:40:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:40:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1872543674, now seen corresponding path program 47 times [2021-05-02 18:40:25,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:40:25,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632168002] [2021-05-02 18:40:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:40:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:26,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:40:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:26,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:40:26,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632168002] [2021-05-02 18:40:26,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632168002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:26,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293209022] [2021-05-02 18:40:26,380 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 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 18:40:26,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-05-02 18:40:26,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:40:26,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 18:40:26,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:40:26,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:26,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:27,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:28,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:28,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:28,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:28,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:28,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293209022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:28,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:40:28,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 100 [2021-05-02 18:40:28,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029895065] [2021-05-02 18:40:28,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 18:40:28,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:40:28,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 18:40:28,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3725, Invalid=6175, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 18:40:28,123 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 100 states, 100 states have (on average 1.99) internal successors, (199), 98 states have internal predecessors, (199), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:31,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:40:31,100 INFO L93 Difference]: Finished difference Result 110 states and 159 transitions. [2021-05-02 18:40:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 18:40:31,100 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 98 states have internal predecessors, (199), 3 states have call successors, (4), 4 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 106 [2021-05-02 18:40:31,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:40:31,101 INFO L225 Difference]: With dead ends: 110 [2021-05-02 18:40:31,101 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 18:40:31,102 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6860 ImplicationChecksByTransitivity, 4836.4ms TimeCoverageRelationStatistics Valid=7449, Invalid=14603, Unknown=0, NotChecked=0, Total=22052 [2021-05-02 18:40:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 18:40:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 18:40:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2021-05-02 18:40:31,104 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 106 [2021-05-02 18:40:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:40:31,104 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2021-05-02 18:40:31,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 98 states have internal predecessors, (199), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2021-05-02 18:40:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 18:40:31,104 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:40:31,104 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:40:31,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:40:31,320 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:40:31,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:40:31,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1889363684, now seen corresponding path program 48 times [2021-05-02 18:40:31,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:40:31,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896359484] [2021-05-02 18:40:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:40:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:32,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:40:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:32,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:40:32,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896359484] [2021-05-02 18:40:32,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896359484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:32,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746886474] [2021-05-02 18:40:32,560 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 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 18:40:32,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-05-02 18:40:32,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:40:32,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 18:40:32,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:40:32,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:32,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:33,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:34,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746886474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:34,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:40:34,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2021-05-02 18:40:34,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574716467] [2021-05-02 18:40:34,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 18:40:34,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:40:34,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 18:40:34,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3876, Invalid=6426, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 18:40:34,402 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 100 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:37,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:40:37,762 INFO L93 Difference]: Finished difference Result 112 states and 162 transitions. [2021-05-02 18:40:37,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 18:40:37,763 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 100 states have internal predecessors, (203), 3 states have call successors, (4), 4 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 108 [2021-05-02 18:40:37,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:40:37,764 INFO L225 Difference]: With dead ends: 112 [2021-05-02 18:40:37,764 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 18:40:37,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7150 ImplicationChecksByTransitivity, 5277.8ms TimeCoverageRelationStatistics Valid=7751, Invalid=15201, Unknown=0, NotChecked=0, Total=22952 [2021-05-02 18:40:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 18:40:37,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-02 18:40:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 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 18:40:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2021-05-02 18:40:37,766 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 108 [2021-05-02 18:40:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:40:37,766 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2021-05-02 18:40:37,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 100 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2021-05-02 18:40:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 18:40:37,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:40:37,767 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:40:37,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 18:40:37,975 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:40:37,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:40:37,976 INFO L82 PathProgramCache]: Analyzing trace with hash -719871490, now seen corresponding path program 49 times [2021-05-02 18:40:37,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:40:37,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614621196] [2021-05-02 18:40:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:40:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:39,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:40:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:39,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:40:39,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614621196] [2021-05-02 18:40:39,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614621196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:39,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209673819] [2021-05-02 18:40:39,262 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 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 18:40:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:39,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 18:40:39,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:40:39,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:39,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:40,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:41,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:41,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:41,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:41,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209673819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:41,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:40:41,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 104 [2021-05-02 18:40:41,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455948121] [2021-05-02 18:40:41,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 18:40:41,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:40:41,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 18:40:41,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4030, Invalid=6682, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 18:40:41,069 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 102 states have internal predecessors, (207), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:40:44,540 INFO L93 Difference]: Finished difference Result 114 states and 165 transitions. [2021-05-02 18:40:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 18:40:44,540 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 102 states have internal predecessors, (207), 3 states have call successors, (4), 4 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 110 [2021-05-02 18:40:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:40:44,541 INFO L225 Difference]: With dead ends: 114 [2021-05-02 18:40:44,541 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 18:40:44,542 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7446 ImplicationChecksByTransitivity, 5431.3ms TimeCoverageRelationStatistics Valid=8059, Invalid=15811, Unknown=0, NotChecked=0, Total=23870 [2021-05-02 18:40:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 18:40:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-02 18:40:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 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 18:40:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2021-05-02 18:40:44,544 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 110 [2021-05-02 18:40:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:40:44,544 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2021-05-02 18:40:44,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 102 states have internal predecessors, (207), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:44,544 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2021-05-02 18:40:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 18:40:44,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:40:44,545 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:40:44,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:40:44,761 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:40:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:40:44,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2119304608, now seen corresponding path program 50 times [2021-05-02 18:40:44,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:40:44,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897156006] [2021-05-02 18:40:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:40:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:46,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:40:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:46,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:40:46,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897156006] [2021-05-02 18:40:46,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897156006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:46,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378100839] [2021-05-02 18:40:46,113 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 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 18:40:46,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:40:46,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:40:46,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 18:40:46,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:40:46,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:46,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:47,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378100839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:47,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:40:47,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 106 [2021-05-02 18:40:47,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075666744] [2021-05-02 18:40:47,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 18:40:47,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:40:47,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 18:40:47,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4187, Invalid=6943, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 18:40:47,958 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 104 states have internal predecessors, (211), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:51,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:40:51,364 INFO L93 Difference]: Finished difference Result 116 states and 168 transitions. [2021-05-02 18:40:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 18:40:51,365 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 104 states have internal predecessors, (211), 3 states have call successors, (4), 4 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 112 [2021-05-02 18:40:51,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:40:51,365 INFO L225 Difference]: With dead ends: 116 [2021-05-02 18:40:51,365 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 18:40:51,366 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7748 ImplicationChecksByTransitivity, 5509.0ms TimeCoverageRelationStatistics Valid=8373, Invalid=16433, Unknown=0, NotChecked=0, Total=24806 [2021-05-02 18:40:51,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 18:40:51,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 18:40:51,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 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 18:40:51,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2021-05-02 18:40:51,368 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 112 [2021-05-02 18:40:51,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:40:51,368 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2021-05-02 18:40:51,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 104 states have internal predecessors, (211), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:51,368 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2021-05-02 18:40:51,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 18:40:51,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:40:51,368 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:40:51,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:40:51,585 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:40:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:40:51,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1645199938, now seen corresponding path program 51 times [2021-05-02 18:40:51,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:40:51,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366868217] [2021-05-02 18:40:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:40:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:53,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:40:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:40:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:53,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:40:53,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366868217] [2021-05-02 18:40:53,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366868217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:53,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181003125] [2021-05-02 18:40:53,037 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 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 18:40:53,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-05-02 18:40:53,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:40:53,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 18:40:53,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:40:53,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:53,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:54,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:55,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:55,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:55,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:40:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:40:55,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181003125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:40:55,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:40:55,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 108 [2021-05-02 18:40:55,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329298873] [2021-05-02 18:40:55,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-02 18:40:55,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:40:55,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-02 18:40:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4347, Invalid=7209, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 18:40:55,130 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 106 states have internal predecessors, (215), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:58,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:40:58,840 INFO L93 Difference]: Finished difference Result 118 states and 171 transitions. [2021-05-02 18:40:58,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 18:40:58,841 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 106 states have internal predecessors, (215), 3 states have call successors, (4), 4 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 114 [2021-05-02 18:40:58,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:40:58,842 INFO L225 Difference]: With dead ends: 118 [2021-05-02 18:40:58,842 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 18:40:58,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8056 ImplicationChecksByTransitivity, 5998.8ms TimeCoverageRelationStatistics Valid=8693, Invalid=17067, Unknown=0, NotChecked=0, Total=25760 [2021-05-02 18:40:58,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 18:40:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-05-02 18:40:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 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 18:40:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2021-05-02 18:40:58,844 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 114 [2021-05-02 18:40:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:40:58,844 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2021-05-02 18:40:58,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 106 states have internal predecessors, (215), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:40:58,844 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2021-05-02 18:40:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 18:40:58,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:40:58,845 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:40:59,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 18:40:59,057 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:40:59,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:40:59,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1323361884, now seen corresponding path program 52 times [2021-05-02 18:40:59,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:40:59,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079433596] [2021-05-02 18:40:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:40:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:41:00,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:41:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:41:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:41:00,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:41:00,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079433596] [2021-05-02 18:41:00,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079433596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:41:00,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610174610] [2021-05-02 18:41:00,457 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 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 18:41:00,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:41:00,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:41:00,501 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 114 conjunts are in the unsatisfiable core [2021-05-02 18:41:00,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:41:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:41:03,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610174610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:41:03,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:41:03,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 58] total 113 [2021-05-02 18:41:03,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768764872] [2021-05-02 18:41:03,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2021-05-02 18:41:03,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:41:03,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-05-02 18:41:03,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1604, Invalid=11052, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 18:41:03,396 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 113 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 111 states have internal predecessors, (223), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:41:20,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:41:20,018 INFO L93 Difference]: Finished difference Result 224 states and 330 transitions. [2021-05-02 18:41:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 18:41:20,019 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 111 states have internal predecessors, (223), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 116 [2021-05-02 18:41:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:41:20,020 INFO L225 Difference]: With dead ends: 224 [2021-05-02 18:41:20,020 INFO L226 Difference]: Without dead ends: 224 [2021-05-02 18:41:20,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8694 ImplicationChecksByTransitivity, 14274.0ms TimeCoverageRelationStatistics Valid=7751, Invalid=39991, Unknown=0, NotChecked=0, Total=47742 [2021-05-02 18:41:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-02 18:41:20,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 119. [2021-05-02 18:41:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 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 18:41:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2021-05-02 18:41:20,024 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 116 [2021-05-02 18:41:20,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:41:20,024 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2021-05-02 18:41:20,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 113 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 111 states have internal predecessors, (223), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:41:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2021-05-02 18:41:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 18:41:20,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:41:20,024 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:41:20,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:41:20,225 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:41:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:41:20,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2041979014, now seen corresponding path program 53 times [2021-05-02 18:41:20,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:41:20,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372152791] [2021-05-02 18:41:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:41:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:41:21,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:41:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:41:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:41:21,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:41:21,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372152791] [2021-05-02 18:41:21,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372152791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:41:21,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053130703] [2021-05-02 18:41:21,750 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 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 18:41:21,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-05-02 18:41:21,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:41:21,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 18:41:21,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:41:21,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:21,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:21,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:21,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:21,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:21,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:21,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:21,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:21,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:21,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:21,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:21,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:21,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:21,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:22,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:41:23,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053130703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:41:23,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:41:23,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 112 [2021-05-02 18:41:23,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502481139] [2021-05-02 18:41:23,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-02 18:41:23,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:41:23,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-02 18:41:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4676, Invalid=7756, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 18:41:23,996 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 112 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 110 states have internal predecessors, (223), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:41:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:41:27,854 INFO L93 Difference]: Finished difference Result 122 states and 177 transitions. [2021-05-02 18:41:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 18:41:27,855 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 110 states have internal predecessors, (223), 3 states have call successors, (4), 4 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 118 [2021-05-02 18:41:27,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:41:27,855 INFO L225 Difference]: With dead ends: 122 [2021-05-02 18:41:27,855 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 18:41:27,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8690 ImplicationChecksByTransitivity, 6333.7ms TimeCoverageRelationStatistics Valid=9351, Invalid=18371, Unknown=0, NotChecked=0, Total=27722 [2021-05-02 18:41:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 18:41:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-05-02 18:41:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 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 18:41:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2021-05-02 18:41:27,858 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 118 [2021-05-02 18:41:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:41:27,858 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2021-05-02 18:41:27,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 110 states have internal predecessors, (223), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:41:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2021-05-02 18:41:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 18:41:27,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:41:27,859 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:41:28,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-02 18:41:28,059 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:41:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:41:28,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2024208104, now seen corresponding path program 54 times [2021-05-02 18:41:28,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:41:28,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466722529] [2021-05-02 18:41:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:41:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:41:29,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:41:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:41:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:41:29,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:41:29,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466722529] [2021-05-02 18:41:29,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466722529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:41:29,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876035014] [2021-05-02 18:41:29,666 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 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 18:41:29,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-05-02 18:41:29,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:41:29,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 18:41:29,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:41:29,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:29,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:30,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:41:31,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876035014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:41:31,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:41:31,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 114 [2021-05-02 18:41:31,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911665905] [2021-05-02 18:41:31,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 18:41:31,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:41:31,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 18:41:31,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4845, Invalid=8037, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 18:41:31,858 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 114 states, 114 states have (on average 1.9912280701754386) internal successors, (227), 112 states have internal predecessors, (227), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:41:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:41:35,915 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2021-05-02 18:41:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 18:41:35,916 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.9912280701754386) internal successors, (227), 112 states have internal predecessors, (227), 3 states have call successors, (4), 4 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 120 [2021-05-02 18:41:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:41:35,916 INFO L225 Difference]: With dead ends: 124 [2021-05-02 18:41:35,917 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 18:41:35,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9016 ImplicationChecksByTransitivity, 6475.8ms TimeCoverageRelationStatistics Valid=9689, Invalid=19041, Unknown=0, NotChecked=0, Total=28730 [2021-05-02 18:41:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 18:41:35,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-05-02 18:41:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 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 18:41:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2021-05-02 18:41:35,919 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 120 [2021-05-02 18:41:35,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:41:35,919 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2021-05-02 18:41:35,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 1.9912280701754386) internal successors, (227), 112 states have internal predecessors, (227), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:41:35,919 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2021-05-02 18:41:35,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 18:41:35,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:41:35,920 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:41:36,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 18:41:36,121 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:41:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:41:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2126232778, now seen corresponding path program 55 times [2021-05-02 18:41:36,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:41:36,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820408262] [2021-05-02 18:41:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:41:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:41:37,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:41:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:41:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:41:37,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:41:37,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820408262] [2021-05-02 18:41:37,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820408262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:41:37,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75226098] [2021-05-02 18:41:37,832 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 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 18:41:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:41:37,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 18:41:37,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:41:37,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:37,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:37,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:37,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:37,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:37,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:37,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:37,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:37,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:37,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:38,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:39,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:40,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:40,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:40,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:41:40,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75226098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:41:40,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:41:40,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 116 [2021-05-02 18:41:40,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523768704] [2021-05-02 18:41:40,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-02 18:41:40,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:41:40,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-02 18:41:40,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5017, Invalid=8323, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 18:41:40,077 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 114 states have internal predecessors, (231), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:41:43,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:41:43,962 INFO L93 Difference]: Finished difference Result 126 states and 183 transitions. [2021-05-02 18:41:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 18:41:43,963 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 114 states have internal predecessors, (231), 3 states have call successors, (4), 4 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 122 [2021-05-02 18:41:43,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:41:43,964 INFO L225 Difference]: With dead ends: 126 [2021-05-02 18:41:43,964 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 18:41:43,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9348 ImplicationChecksByTransitivity, 6661.0ms TimeCoverageRelationStatistics Valid=10033, Invalid=19723, Unknown=0, NotChecked=0, Total=29756 [2021-05-02 18:41:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 18:41:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-05-02 18:41:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 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 18:41:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2021-05-02 18:41:43,969 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 122 [2021-05-02 18:41:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:41:43,969 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2021-05-02 18:41:43,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 114 states have internal predecessors, (231), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:41:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2021-05-02 18:41:43,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 18:41:43,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:41:43,970 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:41:44,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:41:44,170 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:41:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:41:44,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1387696684, now seen corresponding path program 56 times [2021-05-02 18:41:44,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:41:44,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641805376] [2021-05-02 18:41:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:41:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:41:45,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:41:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:41:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:41:45,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:41:45,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641805376] [2021-05-02 18:41:45,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641805376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:41:45,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947765312] [2021-05-02 18:41:45,835 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 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 18:41:45,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:41:45,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:41:45,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 18:41:45,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:41:45,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:45,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:45,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:45,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:45,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:45,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:45,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:45,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:46,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:47,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:48,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:48,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:48,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:41:48,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947765312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:41:48,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:41:48,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 118 [2021-05-02 18:41:48,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499953770] [2021-05-02 18:41:48,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-02 18:41:48,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:41:48,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-02 18:41:48,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5192, Invalid=8614, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 18:41:48,102 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 116 states have internal predecessors, (235), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:41:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:41:52,177 INFO L93 Difference]: Finished difference Result 128 states and 186 transitions. [2021-05-02 18:41:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 18:41:52,178 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 116 states have internal predecessors, (235), 3 states have call successors, (4), 4 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 124 [2021-05-02 18:41:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:41:52,179 INFO L225 Difference]: With dead ends: 128 [2021-05-02 18:41:52,179 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 18:41:52,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9686 ImplicationChecksByTransitivity, 6733.3ms TimeCoverageRelationStatistics Valid=10383, Invalid=20417, Unknown=0, NotChecked=0, Total=30800 [2021-05-02 18:41:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 18:41:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-05-02 18:41:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 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 18:41:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2021-05-02 18:41:52,181 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 124 [2021-05-02 18:41:52,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:41:52,181 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2021-05-02 18:41:52,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 116 states have internal predecessors, (235), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:41:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2021-05-02 18:41:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 18:41:52,182 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:41:52,182 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:41:52,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-02 18:41:52,385 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:41:52,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:41:52,385 INFO L82 PathProgramCache]: Analyzing trace with hash 324114190, now seen corresponding path program 57 times [2021-05-02 18:41:52,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:41:52,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457530737] [2021-05-02 18:41:52,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:41:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:41:54,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:41:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:41:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:41:54,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:41:54,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457530737] [2021-05-02 18:41:54,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457530737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:41:54,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193100217] [2021-05-02 18:41:54,135 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 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 18:41:54,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-05-02 18:41:54,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:41:54,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 18:41:54,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:41:54,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:54,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:55,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:41:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:41:56,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193100217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:41:56,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:41:56,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 120 [2021-05-02 18:41:56,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848214561] [2021-05-02 18:41:56,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-02 18:41:56,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:41:56,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-02 18:41:56,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5370, Invalid=8910, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 18:41:56,670 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 118 states have internal predecessors, (239), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:42:00,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:42:00,986 INFO L93 Difference]: Finished difference Result 130 states and 189 transitions. [2021-05-02 18:42:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 18:42:00,987 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 118 states have internal predecessors, (239), 3 states have call successors, (4), 4 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 126 [2021-05-02 18:42:00,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:42:00,987 INFO L225 Difference]: With dead ends: 130 [2021-05-02 18:42:00,987 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 18:42:00,988 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10030 ImplicationChecksByTransitivity, 7146.6ms TimeCoverageRelationStatistics Valid=10739, Invalid=21123, Unknown=0, NotChecked=0, Total=31862 [2021-05-02 18:42:00,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 18:42:00,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-05-02 18:42:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 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 18:42:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2021-05-02 18:42:00,990 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 126 [2021-05-02 18:42:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:42:00,990 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2021-05-02 18:42:00,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 118 states have internal predecessors, (239), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:42:00,990 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2021-05-02 18:42:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 18:42:00,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:42:00,991 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:42:01,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:42:01,195 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:42:01,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:42:01,195 INFO L82 PathProgramCache]: Analyzing trace with hash 423553904, now seen corresponding path program 58 times [2021-05-02 18:42:01,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:42:01,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087014300] [2021-05-02 18:42:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:42:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:42:03,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:42:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:42:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:42:03,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:42:03,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087014300] [2021-05-02 18:42:03,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087014300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:42:03,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041237450] [2021-05-02 18:42:03,104 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 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 18:42:03,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:42:03,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:42:03,164 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 126 conjunts are in the unsatisfiable core [2021-05-02 18:42:03,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:42:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:42:07,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041237450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:42:07,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:42:07,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 64] total 125 [2021-05-02 18:42:07,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787887469] [2021-05-02 18:42:07,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 125 states [2021-05-02 18:42:07,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:42:07,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-05-02 18:42:07,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=13539, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 18:42:07,176 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 125 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 123 states have internal predecessors, (247), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:42:29,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:42:29,217 INFO L93 Difference]: Finished difference Result 248 states and 366 transitions. [2021-05-02 18:42:29,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-02 18:42:29,218 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 123 states have internal predecessors, (247), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 128 [2021-05-02 18:42:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:42:29,219 INFO L225 Difference]: With dead ends: 248 [2021-05-02 18:42:29,219 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 18:42:29,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10740 ImplicationChecksByTransitivity, 18892.8ms TimeCoverageRelationStatistics Valid=9512, Invalid=49294, Unknown=0, NotChecked=0, Total=58806 [2021-05-02 18:42:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 18:42:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 131. [2021-05-02 18:42:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 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 18:42:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2021-05-02 18:42:29,223 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 128 [2021-05-02 18:42:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:42:29,223 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2021-05-02 18:42:29,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 125 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 123 states have internal predecessors, (247), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:42:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2021-05-02 18:42:29,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 18:42:29,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:42:29,224 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:42:29,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-02 18:42:29,424 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:42:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:42:29,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1495838546, now seen corresponding path program 59 times [2021-05-02 18:42:29,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:42:29,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567240550] [2021-05-02 18:42:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:42:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:42:31,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:42:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:42:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:42:31,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:42:31,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567240550] [2021-05-02 18:42:31,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567240550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:42:31,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317813959] [2021-05-02 18:42:31,323 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 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 18:42:31,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-05-02 18:42:31,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:42:31,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 18:42:31,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:42:31,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:31,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:32,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:33,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:34,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:42:34,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317813959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:42:34,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:42:34,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 124 [2021-05-02 18:42:34,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972988271] [2021-05-02 18:42:34,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-02 18:42:34,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:42:34,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-02 18:42:34,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5735, Invalid=9517, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 18:42:34,060 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 124 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 122 states have internal predecessors, (247), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:42:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:42:39,049 INFO L93 Difference]: Finished difference Result 134 states and 195 transitions. [2021-05-02 18:42:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 18:42:39,050 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 122 states have internal predecessors, (247), 3 states have call successors, (4), 4 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 130 [2021-05-02 18:42:39,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:42:39,051 INFO L225 Difference]: With dead ends: 134 [2021-05-02 18:42:39,051 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 18:42:39,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10736 ImplicationChecksByTransitivity, 8046.6ms TimeCoverageRelationStatistics Valid=11469, Invalid=22571, Unknown=0, NotChecked=0, Total=34040 [2021-05-02 18:42:39,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 18:42:39,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-05-02 18:42:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 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 18:42:39,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2021-05-02 18:42:39,053 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 130 [2021-05-02 18:42:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:42:39,053 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2021-05-02 18:42:39,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 122 states have internal predecessors, (247), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:42:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2021-05-02 18:42:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 18:42:39,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:42:39,054 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:42:39,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:42:39,255 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:42:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:42:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1169228468, now seen corresponding path program 60 times [2021-05-02 18:42:39,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:42:39,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054529936] [2021-05-02 18:42:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:42:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:42:41,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:42:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:42:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:42:41,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:42:41,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054529936] [2021-05-02 18:42:41,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054529936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:42:41,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804927524] [2021-05-02 18:42:41,308 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 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 18:42:41,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-05-02 18:42:41,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:42:41,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 18:42:41,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:42:41,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:41,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:42,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:43,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:44,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:44,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:44,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:44,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:44,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:42:44,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804927524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:42:44,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:42:44,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 126 [2021-05-02 18:42:44,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62319888] [2021-05-02 18:42:44,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-02 18:42:44,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:42:44,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-02 18:42:44,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5922, Invalid=9828, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 18:42:44,237 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 126 states, 126 states have (on average 1.992063492063492) internal successors, (251), 124 states have internal predecessors, (251), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:42:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:42:49,251 INFO L93 Difference]: Finished difference Result 136 states and 198 transitions. [2021-05-02 18:42:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 18:42:49,252 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.992063492063492) internal successors, (251), 124 states have internal predecessors, (251), 3 states have call successors, (4), 4 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 132 [2021-05-02 18:42:49,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:42:49,253 INFO L225 Difference]: With dead ends: 136 [2021-05-02 18:42:49,253 INFO L226 Difference]: Without dead ends: 136 [2021-05-02 18:42:49,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11098 ImplicationChecksByTransitivity, 8474.1ms TimeCoverageRelationStatistics Valid=11843, Invalid=23313, Unknown=0, NotChecked=0, Total=35156 [2021-05-02 18:42:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-02 18:42:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-05-02 18:42:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 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 18:42:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2021-05-02 18:42:49,255 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 132 [2021-05-02 18:42:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:42:49,256 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2021-05-02 18:42:49,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 1.992063492063492) internal successors, (251), 124 states have internal predecessors, (251), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:42:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2021-05-02 18:42:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 18:42:49,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:42:49,256 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:42:49,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-05-02 18:42:49,457 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:42:49,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:42:49,457 INFO L82 PathProgramCache]: Analyzing trace with hash 829556118, now seen corresponding path program 61 times [2021-05-02 18:42:49,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:42:49,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27255206] [2021-05-02 18:42:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:42:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:42:51,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:42:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:42:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:42:51,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:42:51,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27255206] [2021-05-02 18:42:51,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27255206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:42:51,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219388394] [2021-05-02 18:42:51,685 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 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 18:42:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:42:51,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-02 18:42:51,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:42:51,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:51,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:52,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:53,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:54,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:42:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:42:55,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219388394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:42:55,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:42:55,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 128 [2021-05-02 18:42:55,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551809696] [2021-05-02 18:42:55,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-02 18:42:55,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:42:55,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-02 18:42:55,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6112, Invalid=10144, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 18:42:55,004 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 128 states, 128 states have (on average 1.9921875) internal successors, (255), 126 states have internal predecessors, (255), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:43:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:43:00,307 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2021-05-02 18:43:00,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 18:43:00,308 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.9921875) internal successors, (255), 126 states have internal predecessors, (255), 3 states have call successors, (4), 4 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 134 [2021-05-02 18:43:00,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:43:00,308 INFO L225 Difference]: With dead ends: 138 [2021-05-02 18:43:00,308 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 18:43:00,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11466 ImplicationChecksByTransitivity, 9108.6ms TimeCoverageRelationStatistics Valid=12223, Invalid=24067, Unknown=0, NotChecked=0, Total=36290 [2021-05-02 18:43:00,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 18:43:00,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-02 18:43:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 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 18:43:00,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2021-05-02 18:43:00,311 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 134 [2021-05-02 18:43:00,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:43:00,311 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2021-05-02 18:43:00,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 128 states have (on average 1.9921875) internal successors, (255), 126 states have internal predecessors, (255), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:43:00,311 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2021-05-02 18:43:00,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-02 18:43:00,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:43:00,312 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:43:00,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:43:00,527 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:43:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:43:00,528 INFO L82 PathProgramCache]: Analyzing trace with hash 821942264, now seen corresponding path program 62 times [2021-05-02 18:43:00,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:43:00,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44669643] [2021-05-02 18:43:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:43:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:43:02,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:43:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:43:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:43:02,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:43:02,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44669643] [2021-05-02 18:43:02,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44669643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:43:02,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298922305] [2021-05-02 18:43:02,891 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 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 18:43:02,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:43:02,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:43:02,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-02 18:43:02,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:43:02,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:02,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:03,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:04,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:05,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:06,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:06,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:06,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:06,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:43:06,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298922305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:43:06,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:43:06,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 130 [2021-05-02 18:43:06,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512791827] [2021-05-02 18:43:06,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-02 18:43:06,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:43:06,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-02 18:43:06,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6305, Invalid=10465, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 18:43:06,237 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 128 states have internal predecessors, (259), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:43:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:43:11,682 INFO L93 Difference]: Finished difference Result 140 states and 204 transitions. [2021-05-02 18:43:11,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 18:43:11,683 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 128 states have internal predecessors, (259), 3 states have call successors, (4), 4 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 136 [2021-05-02 18:43:11,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:43:11,684 INFO L225 Difference]: With dead ends: 140 [2021-05-02 18:43:11,684 INFO L226 Difference]: Without dead ends: 140 [2021-05-02 18:43:11,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11840 ImplicationChecksByTransitivity, 9441.6ms TimeCoverageRelationStatistics Valid=12609, Invalid=24833, Unknown=0, NotChecked=0, Total=37442 [2021-05-02 18:43:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-02 18:43:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-05-02 18:43:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 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 18:43:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2021-05-02 18:43:11,687 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 136 [2021-05-02 18:43:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:43:11,687 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2021-05-02 18:43:11,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 128 states have internal predecessors, (259), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:43:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2021-05-02 18:43:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 18:43:11,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:43:11,688 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:43:11,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-02 18:43:11,903 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:43:11,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:43:11,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2094963162, now seen corresponding path program 63 times [2021-05-02 18:43:11,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:43:11,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150965136] [2021-05-02 18:43:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:43:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:43:14,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:43:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:43:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:43:14,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:43:14,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150965136] [2021-05-02 18:43:14,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150965136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:43:14,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103719854] [2021-05-02 18:43:14,469 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 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 18:43:14,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-05-02 18:43:14,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:43:14,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 18:43:14,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:43:14,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:14,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:15,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:16,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:43:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:43:17,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103719854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:43:17,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:43:17,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2021-05-02 18:43:17,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239565072] [2021-05-02 18:43:17,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-02 18:43:17,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:43:17,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-02 18:43:17,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6501, Invalid=10791, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 18:43:17,976 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 132 states, 132 states have (on average 1.9924242424242424) internal successors, (263), 130 states have internal predecessors, (263), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:43:23,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:43:23,820 INFO L93 Difference]: Finished difference Result 142 states and 207 transitions. [2021-05-02 18:43:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 18:43:23,822 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.9924242424242424) internal successors, (263), 130 states have internal predecessors, (263), 3 states have call successors, (4), 4 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 138 [2021-05-02 18:43:23,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:43:23,822 INFO L225 Difference]: With dead ends: 142 [2021-05-02 18:43:23,822 INFO L226 Difference]: Without dead ends: 142 [2021-05-02 18:43:23,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12220 ImplicationChecksByTransitivity, 10209.0ms TimeCoverageRelationStatistics Valid=13001, Invalid=25611, Unknown=0, NotChecked=0, Total=38612 [2021-05-02 18:43:23,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-02 18:43:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-05-02 18:43:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 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 18:43:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2021-05-02 18:43:23,826 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 138 [2021-05-02 18:43:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:43:23,826 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2021-05-02 18:43:23,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 132 states have (on average 1.9924242424242424) internal successors, (263), 130 states have internal predecessors, (263), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:43:23,826 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2021-05-02 18:43:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 18:43:23,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:43:23,827 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:43:24,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:43:24,044 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:43:24,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:43:24,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1402366780, now seen corresponding path program 64 times [2021-05-02 18:43:24,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:43:24,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868144611] [2021-05-02 18:43:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:43:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:43:27,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:43:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:43:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:43:27,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:43:27,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868144611] [2021-05-02 18:43:27,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868144611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:43:27,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068162493] [2021-05-02 18:43:27,044 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 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 18:43:27,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:43:27,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:43:27,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 138 conjunts are in the unsatisfiable core [2021-05-02 18:43:27,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:43:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:43:32,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068162493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:43:32,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:43:32,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 70] total 137 [2021-05-02 18:43:32,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146591539] [2021-05-02 18:43:32,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 137 states [2021-05-02 18:43:32,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:43:32,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-05-02 18:43:32,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2354, Invalid=16278, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 18:43:32,747 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 137 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 135 states have internal predecessors, (271), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:44:07,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:44:07,519 INFO L93 Difference]: Finished difference Result 272 states and 402 transitions. [2021-05-02 18:44:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-02 18:44:07,521 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 135 states have internal predecessors, (271), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 140 [2021-05-02 18:44:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:44:07,521 INFO L225 Difference]: With dead ends: 272 [2021-05-02 18:44:07,521 INFO L226 Difference]: Without dead ends: 272 [2021-05-02 18:44:07,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13002 ImplicationChecksByTransitivity, 28264.5ms TimeCoverageRelationStatistics Valid=11453, Invalid=59569, Unknown=0, NotChecked=0, Total=71022 [2021-05-02 18:44:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-02 18:44:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 143. [2021-05-02 18:44:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 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 18:44:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2021-05-02 18:44:07,526 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 140 [2021-05-02 18:44:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:44:07,526 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2021-05-02 18:44:07,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 137 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 135 states have internal predecessors, (271), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:44:07,527 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2021-05-02 18:44:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-02 18:44:07,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:44:07,527 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:44:07,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-02 18:44:07,728 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:44:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:44:07,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1537174558, now seen corresponding path program 65 times [2021-05-02 18:44:07,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:44:07,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016239368] [2021-05-02 18:44:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:44:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:44:10,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:44:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:44:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:44:10,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:44:10,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016239368] [2021-05-02 18:44:10,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016239368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:44:10,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625923003] [2021-05-02 18:44:10,869 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 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 18:44:10,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-05-02 18:44:10,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:44:10,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 18:44:10,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:44:11,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:11,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:12,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:13,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:14,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:15,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:15,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:15,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:15,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:15,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:15,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:15,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:44:15,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625923003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:44:15,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:44:15,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 136 [2021-05-02 18:44:15,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721752970] [2021-05-02 18:44:15,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-02 18:44:15,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:44:15,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-02 18:44:15,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6902, Invalid=11458, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 18:44:15,372 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 136 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 134 states have internal predecessors, (271), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:44:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:44:22,574 INFO L93 Difference]: Finished difference Result 146 states and 213 transitions. [2021-05-02 18:44:22,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 18:44:22,575 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 134 states have internal predecessors, (271), 3 states have call successors, (4), 4 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 142 [2021-05-02 18:44:22,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:44:22,576 INFO L225 Difference]: With dead ends: 146 [2021-05-02 18:44:22,576 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 18:44:22,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12998 ImplicationChecksByTransitivity, 12510.9ms TimeCoverageRelationStatistics Valid=13803, Invalid=27203, Unknown=0, NotChecked=0, Total=41006 [2021-05-02 18:44:22,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 18:44:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-05-02 18:44:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:44:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2021-05-02 18:44:22,579 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 142 [2021-05-02 18:44:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:44:22,579 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2021-05-02 18:44:22,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 134 states have internal predecessors, (271), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:44:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2021-05-02 18:44:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 18:44:22,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:44:22,580 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:44:22,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-02 18:44:22,780 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:44:22,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:44:22,780 INFO L82 PathProgramCache]: Analyzing trace with hash -2056536960, now seen corresponding path program 66 times [2021-05-02 18:44:22,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:44:22,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085925836] [2021-05-02 18:44:22,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:44:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:44:26,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:44:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:44:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:44:26,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:44:26,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085925836] [2021-05-02 18:44:26,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085925836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:44:26,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420369524] [2021-05-02 18:44:26,177 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 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 18:44:26,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-05-02 18:44:26,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:44:26,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 18:44:26,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:44:26,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:26,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:27,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:28,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:29,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:44:30,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420369524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:44:30,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:44:30,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 138 [2021-05-02 18:44:30,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683472916] [2021-05-02 18:44:30,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-02 18:44:30,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:44:30,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-02 18:44:30,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7107, Invalid=11799, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 18:44:30,749 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 138 states, 138 states have (on average 1.9927536231884058) internal successors, (275), 136 states have internal predecessors, (275), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:44:38,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:44:38,579 INFO L93 Difference]: Finished difference Result 148 states and 216 transitions. [2021-05-02 18:44:38,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 18:44:38,580 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.9927536231884058) internal successors, (275), 136 states have internal predecessors, (275), 3 states have call successors, (4), 4 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 144 [2021-05-02 18:44:38,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:44:38,581 INFO L225 Difference]: With dead ends: 148 [2021-05-02 18:44:38,581 INFO L226 Difference]: Without dead ends: 148 [2021-05-02 18:44:38,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13396 ImplicationChecksByTransitivity, 13345.4ms TimeCoverageRelationStatistics Valid=14213, Invalid=28017, Unknown=0, NotChecked=0, Total=42230 [2021-05-02 18:44:38,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-02 18:44:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-05-02 18:44:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 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 18:44:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2021-05-02 18:44:38,584 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 144 [2021-05-02 18:44:38,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:44:38,584 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2021-05-02 18:44:38,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 138 states, 138 states have (on average 1.9927536231884058) internal successors, (275), 136 states have internal predecessors, (275), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:44:38,585 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2021-05-02 18:44:38,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 18:44:38,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:44:38,585 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:44:38,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-02 18:44:38,802 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:44:38,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:44:38,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1835367522, now seen corresponding path program 67 times [2021-05-02 18:44:38,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:44:38,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633493460] [2021-05-02 18:44:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:44:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:44:41,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:44:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:44:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:44:41,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:44:41,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633493460] [2021-05-02 18:44:41,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633493460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:44:41,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884995623] [2021-05-02 18:44:41,981 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 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 18:44:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:44:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 18:44:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:44:42,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:42,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:43,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:44,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:45,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:46,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:46,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:46,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:46,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:46,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:46,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:46,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:46,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:46,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:46,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:46,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:44:46,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884995623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:44:46,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:44:46,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 140 [2021-05-02 18:44:46,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548962299] [2021-05-02 18:44:46,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 140 states [2021-05-02 18:44:46,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:44:46,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-05-02 18:44:46,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7315, Invalid=12145, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 18:44:46,630 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 138 states have internal predecessors, (279), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:44:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:44:54,138 INFO L93 Difference]: Finished difference Result 150 states and 219 transitions. [2021-05-02 18:44:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 18:44:54,139 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 138 states have internal predecessors, (279), 3 states have call successors, (4), 4 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 146 [2021-05-02 18:44:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:44:54,140 INFO L225 Difference]: With dead ends: 150 [2021-05-02 18:44:54,140 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 18:44:54,142 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13800 ImplicationChecksByTransitivity, 12915.0ms TimeCoverageRelationStatistics Valid=14629, Invalid=28843, Unknown=0, NotChecked=0, Total=43472 [2021-05-02 18:44:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 18:44:54,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-05-02 18:44:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 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 18:44:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2021-05-02 18:44:54,144 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 146 [2021-05-02 18:44:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:44:54,144 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2021-05-02 18:44:54,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 138 states have internal predecessors, (279), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:44:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2021-05-02 18:44:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 18:44:54,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:44:54,144 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:44:54,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:44:54,353 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:44:54,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:44:54,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1039059908, now seen corresponding path program 68 times [2021-05-02 18:44:54,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:44:54,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474335566] [2021-05-02 18:44:54,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:44:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:44:58,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:44:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:44:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:44:58,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:44:58,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474335566] [2021-05-02 18:44:58,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474335566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:44:58,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517025408] [2021-05-02 18:44:58,293 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 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 18:44:58,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:44:58,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:44:58,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-02 18:44:58,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:44:58,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:58,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:44:59,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:00,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:01,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:02,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:03,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:03,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:03,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:03,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:03,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:03,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:03,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:45:03,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517025408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:45:03,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:45:03,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 142 [2021-05-02 18:45:03,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111710306] [2021-05-02 18:45:03,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 142 states [2021-05-02 18:45:03,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:45:03,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-05-02 18:45:03,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7526, Invalid=12496, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 18:45:03,553 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 142 states, 142 states have (on average 1.9929577464788732) internal successors, (283), 140 states have internal predecessors, (283), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:45:13,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:45:13,166 INFO L93 Difference]: Finished difference Result 152 states and 222 transitions. [2021-05-02 18:45:13,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 18:45:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 1.9929577464788732) internal successors, (283), 140 states have internal predecessors, (283), 3 states have call successors, (4), 4 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 148 [2021-05-02 18:45:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:45:13,169 INFO L225 Difference]: With dead ends: 152 [2021-05-02 18:45:13,169 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 18:45:13,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14210 ImplicationChecksByTransitivity, 15915.8ms TimeCoverageRelationStatistics Valid=15051, Invalid=29681, Unknown=0, NotChecked=0, Total=44732 [2021-05-02 18:45:13,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 18:45:13,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-05-02 18:45:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 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 18:45:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2021-05-02 18:45:13,172 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 148 [2021-05-02 18:45:13,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:45:13,172 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2021-05-02 18:45:13,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 142 states, 142 states have (on average 1.9929577464788732) internal successors, (283), 140 states have internal predecessors, (283), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:45:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2021-05-02 18:45:13,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-02 18:45:13,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:45:13,173 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:45:13,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-02 18:45:13,389 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:45:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:45:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash 291621542, now seen corresponding path program 69 times [2021-05-02 18:45:13,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:45:13,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112570213] [2021-05-02 18:45:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:45:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:45:17,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:45:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:45:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:45:17,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:45:17,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112570213] [2021-05-02 18:45:17,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112570213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:45:17,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662078065] [2021-05-02 18:45:17,827 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 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 18:45:17,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2021-05-02 18:45:17,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:45:17,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-02 18:45:17,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:45:18,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:18,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:19,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:20,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:21,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:22,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:23,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:23,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:23,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:23,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:23,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:23,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:23,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:23,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:23,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:23,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:23,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:23,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:24,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:24,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:24,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:45:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:45:24,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662078065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:45:24,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:45:24,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 144 [2021-05-02 18:45:24,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851149341] [2021-05-02 18:45:24,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 144 states [2021-05-02 18:45:24,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:45:24,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-05-02 18:45:24,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7740, Invalid=12852, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 18:45:24,218 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 144 states, 144 states have (on average 1.9930555555555556) internal successors, (287), 142 states have internal predecessors, (287), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:45:34,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:45:34,096 INFO L93 Difference]: Finished difference Result 154 states and 225 transitions. [2021-05-02 18:45:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 18:45:34,097 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.9930555555555556) internal successors, (287), 142 states have internal predecessors, (287), 3 states have call successors, (4), 4 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 150 [2021-05-02 18:45:34,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:45:34,101 INFO L225 Difference]: With dead ends: 154 [2021-05-02 18:45:34,101 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 18:45:34,102 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14626 ImplicationChecksByTransitivity, 17512.5ms TimeCoverageRelationStatistics Valid=15479, Invalid=30531, Unknown=0, NotChecked=0, Total=46010 [2021-05-02 18:45:34,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 18:45:34,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-05-02 18:45:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 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 18:45:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2021-05-02 18:45:34,104 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 150 [2021-05-02 18:45:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:45:34,104 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2021-05-02 18:45:34,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 144 states, 144 states have (on average 1.9930555555555556) internal successors, (287), 142 states have internal predecessors, (287), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:45:34,105 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2021-05-02 18:45:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-05-02 18:45:34,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:45:34,105 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:45:34,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:45:34,322 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:45:34,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:45:34,323 INFO L82 PathProgramCache]: Analyzing trace with hash -737109752, now seen corresponding path program 70 times [2021-05-02 18:45:34,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:45:34,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595331896] [2021-05-02 18:45:34,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:45:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:45:39,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:45:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:45:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:45:39,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:45:39,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595331896] [2021-05-02 18:45:39,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595331896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:45:39,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503481296] [2021-05-02 18:45:39,046 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 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 18:45:39,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:45:39,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:45:39,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 150 conjunts are in the unsatisfiable core [2021-05-02 18:45:39,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:45:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:45:49,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503481296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:45:49,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:45:49,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 76] total 149 [2021-05-02 18:45:49,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926313368] [2021-05-02 18:45:49,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 149 states [2021-05-02 18:45:49,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:45:49,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-05-02 18:45:49,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=19269, Unknown=0, NotChecked=0, Total=22052 [2021-05-02 18:45:49,074 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 149 states, 148 states have (on average 1.9932432432432432) internal successors, (295), 147 states have internal predecessors, (295), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:45:52,017 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:46:05,620 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:46:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:46:47,798 INFO L93 Difference]: Finished difference Result 296 states and 438 transitions. [2021-05-02 18:46:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-05-02 18:46:47,800 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 148 states have (on average 1.9932432432432432) internal successors, (295), 147 states have internal predecessors, (295), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 152 [2021-05-02 18:46:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:46:47,801 INFO L225 Difference]: With dead ends: 296 [2021-05-02 18:46:47,801 INFO L226 Difference]: Without dead ends: 296 [2021-05-02 18:46:47,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15480 ImplicationChecksByTransitivity, 46189.4ms TimeCoverageRelationStatistics Valid=13574, Invalid=70816, Unknown=0, NotChecked=0, Total=84390 [2021-05-02 18:46:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-02 18:46:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 155. [2021-05-02 18:46:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 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 18:46:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2021-05-02 18:46:47,806 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 152 [2021-05-02 18:46:47,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:46:47,807 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2021-05-02 18:46:47,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 149 states, 148 states have (on average 1.9932432432432432) internal successors, (295), 147 states have internal predecessors, (295), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:46:47,807 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2021-05-02 18:46:47,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 18:46:47,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:46:47,807 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:46:48,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-05-02 18:46:48,008 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:46:48,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:46:48,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1505405206, now seen corresponding path program 71 times [2021-05-02 18:46:48,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:46:48,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627123732] [2021-05-02 18:46:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:46:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:46:53,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:46:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:46:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:46:53,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:46:53,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627123732] [2021-05-02 18:46:53,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627123732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:46:53,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484813973] [2021-05-02 18:46:53,550 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 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 18:46:53,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-05-02 18:46:53,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:46:53,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-02 18:46:53,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:46:53,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:53,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:53,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:53,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:53,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:53,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:53,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:53,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:53,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:53,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:53,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:53,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:53,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:53,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:54,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:55,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:56,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:57,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:58,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:46:59,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:00,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:47:00,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484813973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:47:00,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:47:00,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 148 [2021-05-02 18:47:00,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798763013] [2021-05-02 18:47:00,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 148 states [2021-05-02 18:47:00,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:47:00,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-05-02 18:47:00,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8177, Invalid=13579, Unknown=0, NotChecked=0, Total=21756 [2021-05-02 18:47:00,097 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 148 states, 148 states have (on average 1.9932432432432432) internal successors, (295), 146 states have internal predecessors, (295), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:47:10,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:47:10,464 INFO L93 Difference]: Finished difference Result 158 states and 231 transitions. [2021-05-02 18:47:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 18:47:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.9932432432432432) internal successors, (295), 146 states have internal predecessors, (295), 3 states have call successors, (4), 4 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 154 [2021-05-02 18:47:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:47:10,467 INFO L225 Difference]: With dead ends: 158 [2021-05-02 18:47:10,467 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 18:47:10,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15476 ImplicationChecksByTransitivity, 19119.3ms TimeCoverageRelationStatistics Valid=16353, Invalid=32267, Unknown=0, NotChecked=0, Total=48620 [2021-05-02 18:47:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 18:47:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-05-02 18:47:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 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 18:47:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2021-05-02 18:47:10,470 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 154 [2021-05-02 18:47:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:47:10,470 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2021-05-02 18:47:10,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 148 states, 148 states have (on average 1.9932432432432432) internal successors, (295), 146 states have internal predecessors, (295), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:47:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2021-05-02 18:47:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 18:47:10,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:47:10,471 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:47:10,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:47:10,685 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:47:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:47:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1102961588, now seen corresponding path program 72 times [2021-05-02 18:47:10,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:47:10,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428769846] [2021-05-02 18:47:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:47:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:47:16,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:47:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:47:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:47:16,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:47:16,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428769846] [2021-05-02 18:47:16,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428769846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:47:16,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341894270] [2021-05-02 18:47:16,159 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 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 18:47:16,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2021-05-02 18:47:16,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:47:16,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-02 18:47:16,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:47:16,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:16,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:17,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:18,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:19,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:20,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:21,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:22,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:22,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:22,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:22,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:22,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:22,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:22,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:22,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:22,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:22,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:22,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:22,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:23,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:23,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:23,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:23,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:23,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:23,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:23,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:23,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:23,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:23,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:23,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:47:23,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341894270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:47:23,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:47:23,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 150 [2021-05-02 18:47:23,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482431266] [2021-05-02 18:47:23,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 150 states [2021-05-02 18:47:23,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:47:23,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-05-02 18:47:23,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8400, Invalid=13950, Unknown=0, NotChecked=0, Total=22350 [2021-05-02 18:47:23,880 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 150 states, 150 states have (on average 1.9933333333333334) internal successors, (299), 148 states have internal predecessors, (299), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:47:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:47:35,549 INFO L93 Difference]: Finished difference Result 160 states and 234 transitions. [2021-05-02 18:47:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 18:47:35,551 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.9933333333333334) internal successors, (299), 148 states have internal predecessors, (299), 3 states have call successors, (4), 4 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 156 [2021-05-02 18:47:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:47:35,552 INFO L225 Difference]: With dead ends: 160 [2021-05-02 18:47:35,552 INFO L226 Difference]: Without dead ends: 160 [2021-05-02 18:47:35,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15910 ImplicationChecksByTransitivity, 21227.8ms TimeCoverageRelationStatistics Valid=16799, Invalid=33153, Unknown=0, NotChecked=0, Total=49952 [2021-05-02 18:47:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-02 18:47:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-05-02 18:47:35,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 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 18:47:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2021-05-02 18:47:35,555 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 156 [2021-05-02 18:47:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:47:35,556 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2021-05-02 18:47:35,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 150 states, 150 states have (on average 1.9933333333333334) internal successors, (299), 148 states have internal predecessors, (299), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:47:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2021-05-02 18:47:35,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-02 18:47:35,556 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:47:35,556 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:47:35,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:47:35,773 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:47:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:47:35,774 INFO L82 PathProgramCache]: Analyzing trace with hash -901701330, now seen corresponding path program 73 times [2021-05-02 18:47:35,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:47:35,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610966301] [2021-05-02 18:47:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:47:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:47:41,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:47:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:47:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:47:41,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:47:41,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610966301] [2021-05-02 18:47:41,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610966301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:47:41,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7105153] [2021-05-02 18:47:41,330 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 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 18:47:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:47:41,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-02 18:47:41,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:47:41,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:41,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:42,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:43,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:44,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:45,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:46,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:47,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:47,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:47,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:47,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:47,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:47,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:47,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:47,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:47,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:47,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:47,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:47,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:48,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:48,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:48,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:48,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:48,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:48,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:48,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:48,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:48,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:48,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:48,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:47:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:47:49,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7105153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:47:49,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:47:49,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 152 [2021-05-02 18:47:49,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220103518] [2021-05-02 18:47:49,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 152 states [2021-05-02 18:47:49,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:47:49,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-05-02 18:47:49,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8626, Invalid=14326, Unknown=0, NotChecked=0, Total=22952 [2021-05-02 18:47:49,015 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 152 states, 152 states have (on average 1.993421052631579) internal successors, (303), 150 states have internal predecessors, (303), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:48:01,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:48:01,342 INFO L93 Difference]: Finished difference Result 162 states and 237 transitions. [2021-05-02 18:48:01,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 18:48:01,344 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.993421052631579) internal successors, (303), 150 states have internal predecessors, (303), 3 states have call successors, (4), 4 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 158 [2021-05-02 18:48:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:48:01,345 INFO L225 Difference]: With dead ends: 162 [2021-05-02 18:48:01,345 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 18:48:01,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16350 ImplicationChecksByTransitivity, 22114.4ms TimeCoverageRelationStatistics Valid=17251, Invalid=34051, Unknown=0, NotChecked=0, Total=51302 [2021-05-02 18:48:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 18:48:01,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-05-02 18:48:01,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 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 18:48:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2021-05-02 18:48:01,348 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 158 [2021-05-02 18:48:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:48:01,348 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2021-05-02 18:48:01,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 152 states, 152 states have (on average 1.993421052631579) internal successors, (303), 150 states have internal predecessors, (303), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:48:01,349 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2021-05-02 18:48:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 18:48:01,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:48:01,349 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:48:01,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:48:01,566 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:48:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:48:01,566 INFO L82 PathProgramCache]: Analyzing trace with hash -764121712, now seen corresponding path program 74 times [2021-05-02 18:48:01,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:48:01,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033539616] [2021-05-02 18:48:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:48:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:48:08,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:48:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:48:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:48:08,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:48:08,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033539616] [2021-05-02 18:48:08,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033539616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:48:08,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793073672] [2021-05-02 18:48:08,177 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 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 18:48:08,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:48:08,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:48:08,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-02 18:48:08,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:48:08,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:08,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:09,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:10,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:11,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:12,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:13,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:14,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:14,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:14,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:14,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:14,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:14,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:14,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:14,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:14,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:14,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:14,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:14,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:14,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:15,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:15,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:15,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:15,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:15,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:15,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:15,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:15,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:15,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:15,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:15,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:16,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:16,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:16,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:16,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:16,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:16,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:16,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:16,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:16,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:48:16,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793073672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:48:16,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:48:16,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 154 [2021-05-02 18:48:16,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403882609] [2021-05-02 18:48:16,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 154 states [2021-05-02 18:48:16,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:48:16,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-05-02 18:48:16,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8855, Invalid=14707, Unknown=0, NotChecked=0, Total=23562 [2021-05-02 18:48:16,961 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 154 states, 154 states have (on average 1.9935064935064934) internal successors, (307), 152 states have internal predecessors, (307), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:48:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:48:29,839 INFO L93 Difference]: Finished difference Result 164 states and 240 transitions. [2021-05-02 18:48:29,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 18:48:29,841 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.9935064935064934) internal successors, (307), 152 states have internal predecessors, (307), 3 states have call successors, (4), 4 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 160 [2021-05-02 18:48:29,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:48:29,842 INFO L225 Difference]: With dead ends: 164 [2021-05-02 18:48:29,842 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 18:48:29,844 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16796 ImplicationChecksByTransitivity, 24303.4ms TimeCoverageRelationStatistics Valid=17709, Invalid=34961, Unknown=0, NotChecked=0, Total=52670 [2021-05-02 18:48:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 18:48:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-05-02 18:48:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:48:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2021-05-02 18:48:29,846 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 160 [2021-05-02 18:48:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:48:29,846 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2021-05-02 18:48:29,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 154 states, 154 states have (on average 1.9935064935064934) internal successors, (307), 152 states have internal predecessors, (307), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:48:29,846 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2021-05-02 18:48:29,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 18:48:29,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:48:29,846 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:48:30,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-02 18:48:30,048 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:48:30,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:48:30,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1694094990, now seen corresponding path program 75 times [2021-05-02 18:48:30,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:48:30,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208182827] [2021-05-02 18:48:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:48:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:48:36,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:48:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:48:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:48:36,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:48:36,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208182827] [2021-05-02 18:48:36,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208182827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:48:36,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215091321] [2021-05-02 18:48:36,742 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 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 18:48:36,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2021-05-02 18:48:36,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:48:36,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 78 conjunts are in the unsatisfiable core [2021-05-02 18:48:36,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:48:36,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:36,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:37,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:38,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:39,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:40,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:41,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:41,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:41,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:41,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:41,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:41,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:41,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:41,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:41,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:41,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:41,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:41,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:42,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:43,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:43,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:43,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:43,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:43,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:43,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:43,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:43,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:43,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:43,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:44,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:44,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:44,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:44,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:44,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:44,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:44,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:44,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:44,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:44,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:44,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:44,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:45,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:45,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:45,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:45,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:45,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:45,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:45,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:45,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:45,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:45,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:46,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:46,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:46,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:48:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:48:46,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215091321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:48:46,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:48:46,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 156 [2021-05-02 18:48:46,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29570091] [2021-05-02 18:48:46,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 156 states [2021-05-02 18:48:46,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:48:46,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2021-05-02 18:48:46,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9087, Invalid=15093, Unknown=0, NotChecked=0, Total=24180 [2021-05-02 18:48:46,304 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 156 states, 156 states have (on average 1.9935897435897436) internal successors, (311), 154 states have internal predecessors, (311), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:49:00,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:49:00,516 INFO L93 Difference]: Finished difference Result 166 states and 243 transitions. [2021-05-02 18:49:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 18:49:00,518 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.9935897435897436) internal successors, (311), 154 states have internal predecessors, (311), 3 states have call successors, (4), 4 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 162 [2021-05-02 18:49:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:49:00,518 INFO L225 Difference]: With dead ends: 166 [2021-05-02 18:49:00,519 INFO L226 Difference]: Without dead ends: 166 [2021-05-02 18:49:00,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17248 ImplicationChecksByTransitivity, 26246.0ms TimeCoverageRelationStatistics Valid=18173, Invalid=35883, Unknown=0, NotChecked=0, Total=54056 [2021-05-02 18:49:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-02 18:49:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-05-02 18:49:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 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 18:49:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2021-05-02 18:49:00,522 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 162 [2021-05-02 18:49:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:49:00,522 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2021-05-02 18:49:00,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 156 states, 156 states have (on average 1.9935897435897436) internal successors, (311), 154 states have internal predecessors, (311), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:49:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2021-05-02 18:49:00,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-02 18:49:00,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:49:00,523 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:49:00,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:49:00,738 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:49:00,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:49:00,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2045217580, now seen corresponding path program 76 times [2021-05-02 18:49:00,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:49:00,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903892450] [2021-05-02 18:49:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:49:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:49:08,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:49:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:49:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:49:08,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:49:08,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903892450] [2021-05-02 18:49:08,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903892450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:49:08,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303909553] [2021-05-02 18:49:08,583 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 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 18:49:08,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:49:08,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:49:08,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 162 conjunts are in the unsatisfiable core [2021-05-02 18:49:08,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:49:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:49:23,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303909553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:49:23,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:49:23,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 82] total 161 [2021-05-02 18:49:23,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197124874] [2021-05-02 18:49:23,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 161 states [2021-05-02 18:49:23,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:49:23,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-05-02 18:49:23,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=22512, Unknown=0, NotChecked=0, Total=25760 [2021-05-02 18:49:23,772 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 161 states, 160 states have (on average 1.99375) internal successors, (319), 159 states have internal predecessors, (319), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:49:25,219 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 18:49:28,436 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:49:33,370 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:49:34,393 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:49:35,384 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:49:36,390 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:49:37,367 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:49:46,766 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:49:47,935 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:49:53,100 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:49:55,374 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:49:56,567 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:02,011 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:03,423 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:04,859 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:06,220 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:07,545 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:08,808 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:10,159 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:11,481 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:12,911 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:14,444 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:15,871 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:17,205 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:18,611 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:22,788 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:24,260 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:25,667 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 18:50:27,171 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:28,688 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:30,093 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:32,863 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 18:50:34,428 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:36,050 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:37,645 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:39,190 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:40,790 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:42,494 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:44,180 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:45,773 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:47,520 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:49,167 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:52,505 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:54,136 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:55,806 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:50:57,485 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 18:51:00,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:51:00,359 INFO L93 Difference]: Finished difference Result 320 states and 474 transitions. [2021-05-02 18:51:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-05-02 18:51:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 160 states have (on average 1.99375) internal successors, (319), 159 states have internal predecessors, (319), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 164 [2021-05-02 18:51:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:51:00,363 INFO L225 Difference]: With dead ends: 320 [2021-05-02 18:51:00,363 INFO L226 Difference]: Without dead ends: 320 [2021-05-02 18:51:00,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18174 ImplicationChecksByTransitivity, 73704.3ms TimeCoverageRelationStatistics Valid=15875, Invalid=83035, Unknown=0, NotChecked=0, Total=98910 [2021-05-02 18:51:00,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-02 18:51:00,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 167. [2021-05-02 18:51:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:51:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2021-05-02 18:51:00,369 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 164 [2021-05-02 18:51:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:51:00,369 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2021-05-02 18:51:00,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 161 states, 160 states have (on average 1.99375) internal successors, (319), 159 states have internal predecessors, (319), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:51:00,370 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2021-05-02 18:51:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-02 18:51:00,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:51:00,370 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:51:00,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:51:00,571 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:51:00,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:51:00,571 INFO L82 PathProgramCache]: Analyzing trace with hash -171610186, now seen corresponding path program 77 times [2021-05-02 18:51:00,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:51:00,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987800851] [2021-05-02 18:51:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:51:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat