/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:27:34,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:27:34,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:27:34,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:27:34,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:27:34,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:27:34,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:27:34,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:27:34,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:27:34,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:27:34,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:27:34,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:27:34,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:27:34,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:27:34,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:27:34,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:27:34,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:27:34,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:27:34,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:27:34,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:27:34,633 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:27:34,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:27:34,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:27:34,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:27:34,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:27:34,679 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:27:34,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:27:34,679 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:27:34,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:27:34,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:27:34,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:27:34,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:27:34,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:27:34,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:27:34,680 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:27:34,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:27:34,680 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:27:34,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:27:34,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:27:34,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:27:34,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:27:34,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:27:34,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:27:34,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:27:34,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:27:34,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:27:34,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:27:34,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:27:34,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:27:34,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:27:35,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:27:35,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:27:35,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:27:35,057 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:27:35,058 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:27:35,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2021-05-02 13:27:35,118 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a3777ce4/35efe90bfb2e40f89df6c0c2302b8f64/FLAG3bd64e45b [2021-05-02 13:27:35,544 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:27:35,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2021-05-02 13:27:35,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a3777ce4/35efe90bfb2e40f89df6c0c2302b8f64/FLAG3bd64e45b [2021-05-02 13:27:35,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a3777ce4/35efe90bfb2e40f89df6c0c2302b8f64 [2021-05-02 13:27:35,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:27:35,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:27:35,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:27:35,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:27:35,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:27:35,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:27:35" (1/1) ... [2021-05-02 13:27:35,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20850001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:27:35, skipping insertion in model container [2021-05-02 13:27:35,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:27:35" (1/1) ... [2021-05-02 13:27:35,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:27:35,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:27:36,106 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/sumt9.c[403,416] [2021-05-02 13:27:36,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:27:36,135 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:27:36,172 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/sumt9.c[403,416] [2021-05-02 13:27:36,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:27:36,239 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:27:36,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:27:36 WrapperNode [2021-05-02 13:27:36,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:27:36,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:27:36,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:27:36,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:27:36,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:27:36" (1/1) ... [2021-05-02 13:27:36,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:27:36" (1/1) ... [2021-05-02 13:27:36,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:27:36" (1/1) ... [2021-05-02 13:27:36,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:27:36" (1/1) ... [2021-05-02 13:27:36,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:27:36" (1/1) ... [2021-05-02 13:27:36,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:27:36" (1/1) ... [2021-05-02 13:27:36,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:27:36" (1/1) ... [2021-05-02 13:27:36,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:27:36,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:27:36,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:27:36,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:27:36,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:27:36" (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 13:27:36,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:27:36,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:27:36,390 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:27:36,390 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:27:36,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:27:36,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:27:36,390 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:27:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:27:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:27:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:27:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:27:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:27:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:27:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:27:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:27:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:27:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:27:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:27:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:27:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:27:36,746 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:27:36,746 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:27:36,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:27:36 BoogieIcfgContainer [2021-05-02 13:27:36,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:27:36,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:27:36,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:27:36,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:27:36,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:27:35" (1/3) ... [2021-05-02 13:27:36,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b187a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:27:36, skipping insertion in model container [2021-05-02 13:27:36,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:27:36" (2/3) ... [2021-05-02 13:27:36,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b187a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:27:36, skipping insertion in model container [2021-05-02 13:27:36,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:27:36" (3/3) ... [2021-05-02 13:27:36,755 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt9.c [2021-05-02 13:27:36,761 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:27:36,765 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:27:36,781 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:27:36,803 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:27:36,803 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:27:36,804 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:27:36,804 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:27:36,804 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:27:36,804 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:27:36,804 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:27:36,804 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:27:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 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 13:27:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 13:27:36,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:27:36,827 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:27:36,828 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:27:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:27:36,833 INFO L82 PathProgramCache]: Analyzing trace with hash 701348598, now seen corresponding path program 1 times [2021-05-02 13:27:36,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:27:36,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042755254] [2021-05-02 13:27:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:27:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:37,527 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-05-02 13:27:37,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:27:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:37,619 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 13:27:37,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:27:37,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042755254] [2021-05-02 13:27:37,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042755254] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:27:37,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:27:37,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 13:27:37,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506797157] [2021-05-02 13:27:37,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:27:37,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:27:37,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:27:37,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:27:37,641 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 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 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:27:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:27:38,396 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2021-05-02 13:27:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:27:38,398 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 13:27:38,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:27:38,407 INFO L225 Difference]: With dead ends: 74 [2021-05-02 13:27:38,407 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 13:27:38,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 654.0ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:27:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 13:27:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-05-02 13:27:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.375) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:27:38,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-05-02 13:27:38,456 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 14 [2021-05-02 13:27:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:27:38,457 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-05-02 13:27:38,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:27:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-05-02 13:27:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:27:38,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:27:38,459 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:27:38,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:27:38,460 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:27:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:27:38,460 INFO L82 PathProgramCache]: Analyzing trace with hash -133245550, now seen corresponding path program 1 times [2021-05-02 13:27:38,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:27:38,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898580561] [2021-05-02 13:27:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:27:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:38,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:27:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:38,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:27:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:27:38,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:27:38,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898580561] [2021-05-02 13:27:38,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898580561] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:38,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831614340] [2021-05-02 13:27:38,656 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 13:27:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:38,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 13:27:38,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:27:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:27:39,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831614340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:39,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:27:39,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11] total 14 [2021-05-02 13:27:39,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289421485] [2021-05-02 13:27:39,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:27:39,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:27:39,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:27:39,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:27:39,263 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:27:39,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:27:39,837 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2021-05-02 13:27:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:27:39,837 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-05-02 13:27:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:27:39,839 INFO L225 Difference]: With dead ends: 59 [2021-05-02 13:27:39,839 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 13:27:39,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:27:39,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 13:27:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 13:27:39,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:27:39,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 13:27:39,848 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 22 [2021-05-02 13:27:39,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:27:39,848 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 13:27:39,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:27:39,849 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 13:27:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:27:39,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:27:39,850 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:27:40,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:27:40,073 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:27:40,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:27:40,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1817150096, now seen corresponding path program 1 times [2021-05-02 13:27:40,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:27:40,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878380697] [2021-05-02 13:27:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:27:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:40,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:27:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:40,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:27:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:27:40,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:27:40,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878380697] [2021-05-02 13:27:40,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878380697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:40,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169614477] [2021-05-02 13:27:40,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:27:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:40,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 13:27:40,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:27:40,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:40,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:40,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:40,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:40,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:27:40,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169614477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:40,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:27:40,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-02 13:27:40,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709764867] [2021-05-02 13:27:40,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:27:40,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:27:40,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:27:40,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:27:40,914 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:27:41,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:27:41,630 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2021-05-02 13:27:41,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:27:41,632 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-05-02 13:27:41,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:27:41,635 INFO L225 Difference]: With dead ends: 73 [2021-05-02 13:27:41,635 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 13:27:41,637 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 735.5ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:27:41,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 13:27:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 13:27:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:27:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-05-02 13:27:41,663 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 29 [2021-05-02 13:27:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:27:41,664 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-05-02 13:27:41,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:27:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-05-02 13:27:41,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 13:27:41,666 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:27:41,666 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:27:41,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:27:41,898 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:27:41,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:27:41,899 INFO L82 PathProgramCache]: Analyzing trace with hash -271874440, now seen corresponding path program 1 times [2021-05-02 13:27:41,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:27:41,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401239840] [2021-05-02 13:27:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:27:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:42,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:27:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:42,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:27:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:42,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 13:27:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:27:42,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:27:42,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401239840] [2021-05-02 13:27:42,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401239840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:42,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402531441] [2021-05-02 13:27:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:27:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:42,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 13:27:42,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:27:42,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:42,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:42,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:42,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:42,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:42,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:42,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:27:42,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402531441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:42,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:27:42,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-05-02 13:27:42,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918583243] [2021-05-02 13:27:42,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 13:27:42,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:27:42,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 13:27:42,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:27:42,746 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:27:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:27:43,724 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2021-05-02 13:27:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:27:43,725 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-02 13:27:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:27:43,726 INFO L225 Difference]: With dead ends: 87 [2021-05-02 13:27:43,726 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 13:27:43,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 941.1ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-05-02 13:27:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 13:27:43,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-02 13:27:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:27:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-05-02 13:27:43,735 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 44 [2021-05-02 13:27:43,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:27:43,735 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-05-02 13:27:43,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:27:43,736 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-05-02 13:27:43,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 13:27:43,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:27:43,737 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:27:43,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:27:43,949 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:27:43,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:27:43,950 INFO L82 PathProgramCache]: Analyzing trace with hash 176402565, now seen corresponding path program 1 times [2021-05-02 13:27:43,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:27:43,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055701429] [2021-05-02 13:27:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:27:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:44,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:27:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:44,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:27:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:44,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 13:27:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:44,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 13:27:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:27:44,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:27:44,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055701429] [2021-05-02 13:27:44,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055701429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:44,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229367573] [2021-05-02 13:27:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:27:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:44,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 13:27:44,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:27:44,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:44,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:44,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:44,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:44,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:44,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:44,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:44,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:44,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:27:44,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229367573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:44,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:27:44,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-05-02 13:27:44,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137967929] [2021-05-02 13:27:44,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 13:27:44,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:27:44,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 13:27:44,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-02 13:27:44,980 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 24 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:27:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:27:46,105 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2021-05-02 13:27:46,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 13:27:46,106 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2021-05-02 13:27:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:27:46,107 INFO L225 Difference]: With dead ends: 100 [2021-05-02 13:27:46,107 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 13:27:46,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1153.1ms TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 13:27:46,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 13:27:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-02 13:27:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:27:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-02 13:27:46,118 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 58 [2021-05-02 13:27:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:27:46,118 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-02 13:27:46,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:27:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-02 13:27:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 13:27:46,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:27:46,120 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:27:46,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:27:46,325 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:27:46,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:27:46,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2109390440, now seen corresponding path program 1 times [2021-05-02 13:27:46,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:27:46,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106978407] [2021-05-02 13:27:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:27:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:46,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:27:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:46,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:27:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:46,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 13:27:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:46,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 13:27:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:46,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 13:27:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 13:27:46,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:27:46,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106978407] [2021-05-02 13:27:46,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106978407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:46,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962630972] [2021-05-02 13:27:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:27:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 13:27:46,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:27:47,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:47,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:47,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:47,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:47,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:47,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:47,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:47,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:47,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:47,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:47,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 84 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:27:47,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962630972] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:47,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:27:47,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-05-02 13:27:47,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484267227] [2021-05-02 13:27:47,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 13:27:47,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:27:47,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 13:27:47,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:27:47,547 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:27:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:27:49,028 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2021-05-02 13:27:49,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 13:27:49,028 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 71 [2021-05-02 13:27:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:27:49,029 INFO L225 Difference]: With dead ends: 112 [2021-05-02 13:27:49,029 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 13:27:49,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1445.4ms TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 13:27:49,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 13:27:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 13:27:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 79 states have internal predecessors, (88), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:27:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2021-05-02 13:27:49,041 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 71 [2021-05-02 13:27:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:27:49,042 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2021-05-02 13:27:49,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:27:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2021-05-02 13:27:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 13:27:49,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:27:49,043 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:27:49,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:27:49,261 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:27:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:27:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1865047034, now seen corresponding path program 1 times [2021-05-02 13:27:49,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:27:49,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221243284] [2021-05-02 13:27:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:27:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:49,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:27:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:49,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:27:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:49,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 13:27:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:49,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 13:27:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:49,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 13:27:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:49,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-05-02 13:27:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 110 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 13:27:49,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:27:49,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221243284] [2021-05-02 13:27:49,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221243284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:49,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158155879] [2021-05-02 13:27:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:27:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:49,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 13:27:49,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:27:50,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 9 proven. 123 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 13:27:50,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158155879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:50,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:27:50,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-05-02 13:27:50,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344294226] [2021-05-02 13:27:50,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 13:27:50,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:27:50,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 13:27:50,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-05-02 13:27:50,653 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 32 states, 30 states have (on average 3.6) internal successors, (108), 30 states have internal predecessors, (108), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:27:52,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:27:52,134 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2021-05-02 13:27:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 13:27:52,134 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.6) internal successors, (108), 30 states have internal predecessors, (108), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 83 [2021-05-02 13:27:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:27:52,135 INFO L225 Difference]: With dead ends: 123 [2021-05-02 13:27:52,135 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 13:27:52,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1665.0ms TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 13:27:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 13:27:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-02 13:27:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 88 states have (on average 1.1022727272727273) internal successors, (97), 88 states have internal predecessors, (97), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:27:52,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2021-05-02 13:27:52,146 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 83 [2021-05-02 13:27:52,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:27:52,147 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2021-05-02 13:27:52,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 30 states have (on average 3.6) internal successors, (108), 30 states have internal predecessors, (108), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:27:52,147 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2021-05-02 13:27:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 13:27:52,148 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:27:52,148 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:27:52,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:27:52,357 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:27:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:27:52,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1080064888, now seen corresponding path program 1 times [2021-05-02 13:27:52,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:27:52,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100992431] [2021-05-02 13:27:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:27:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:52,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:27:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:52,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:27:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:52,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 13:27:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:52,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 13:27:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:52,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 13:27:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:52,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-05-02 13:27:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:52,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-05-02 13:27:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 12 proven. 149 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 13:27:52,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:27:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100992431] [2021-05-02 13:27:52,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100992431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511661700] [2021-05-02 13:27:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order 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 13:27:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:52,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 13:27:53,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:27:53,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 13:27:53,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511661700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:53,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:27:53,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-02 13:27:53,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115867606] [2021-05-02 13:27:53,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 13:27:53,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:27:53,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 13:27:53,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 13:27:53,711 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 36 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 13:27:55,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:27:55,523 INFO L93 Difference]: Finished difference Result 133 states and 153 transitions. [2021-05-02 13:27:55,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 13:27:55,524 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 94 [2021-05-02 13:27:55,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:27:55,525 INFO L225 Difference]: With dead ends: 133 [2021-05-02 13:27:55,525 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 13:27:55,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1683.9ms TimeCoverageRelationStatistics Valid=318, Invalid=2652, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 13:27:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 13:27:55,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-05-02 13:27:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 96 states have (on average 1.09375) internal successors, (105), 96 states have internal predecessors, (105), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:27:55,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2021-05-02 13:27:55,536 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 94 [2021-05-02 13:27:55,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:27:55,536 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2021-05-02 13:27:55,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 13:27:55,537 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2021-05-02 13:27:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 13:27:55,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:27:55,538 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:27:55,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:27:55,753 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:27:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:27:55,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1282494321, now seen corresponding path program 1 times [2021-05-02 13:27:55,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:27:55,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742851297] [2021-05-02 13:27:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:27:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:56,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:27:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:56,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:27:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:56,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 13:27:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:56,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 13:27:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:56,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 13:27:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:56,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-05-02 13:27:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:56,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-05-02 13:27:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:56,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-05-02 13:27:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-02 13:27:56,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:27:56,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742851297] [2021-05-02 13:27:56,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742851297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:56,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146918032] [2021-05-02 13:27:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:27:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:56,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 13:27:56,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:27:56,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:56,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:56,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:56,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:56,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:56,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:56,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:56,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:56,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:56,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:57,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:57,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:57,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:57,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:57,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:57,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:57,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 13 proven. 208 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 13:27:57,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146918032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:57,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:27:57,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 40 [2021-05-02 13:27:57,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930147610] [2021-05-02 13:27:57,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 13:27:57,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:27:57,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 13:27:57,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 13:27:57,264 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand has 40 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 13:27:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:27:59,335 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2021-05-02 13:27:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 13:27:59,335 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 104 [2021-05-02 13:27:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:27:59,338 INFO L225 Difference]: With dead ends: 142 [2021-05-02 13:27:59,338 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 13:27:59,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 2025.8ms TimeCoverageRelationStatistics Valid=381, Invalid=3279, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 13:27:59,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 13:27:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-02 13:27:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 103 states have (on average 1.087378640776699) internal successors, (112), 103 states have internal predecessors, (112), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 13:27:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2021-05-02 13:27:59,362 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 104 [2021-05-02 13:27:59,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:27:59,363 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2021-05-02 13:27:59,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 13:27:59,363 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2021-05-02 13:27:59,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 13:27:59,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:27:59,365 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:27:59,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 13:27:59,586 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:27:59,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:27:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash -272913176, now seen corresponding path program 1 times [2021-05-02 13:27:59,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:27:59,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506379088] [2021-05-02 13:27:59,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:27:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:00,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:28:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:00,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:28:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:00,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 13:28:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:00,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 13:28:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:00,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 13:28:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:00,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-05-02 13:28:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:00,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-05-02 13:28:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:00,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-05-02 13:28:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:00,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-05-02 13:28:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 16 proven. 228 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-02 13:28:00,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:28:00,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506379088] [2021-05-02 13:28:00,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506379088] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:28:00,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902341963] [2021-05-02 13:28:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:28:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:00,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 13:28:00,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:28:00,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:00,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:00,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:00,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:00,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:00,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:00,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:00,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:00,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:00,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:00,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:00,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:01,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:01,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:01,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:01,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:01,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:01,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:01,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:28:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 15 proven. 250 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 13:28:01,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902341963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:28:01,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:28:01,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 44 [2021-05-02 13:28:01,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439404442] [2021-05-02 13:28:01,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 13:28:01,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:28:01,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 13:28:01,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 13:28:01,339 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 44 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 13:28:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:28:03,735 INFO L93 Difference]: Finished difference Result 161 states and 188 transitions. [2021-05-02 13:28:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 13:28:03,736 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 113 [2021-05-02 13:28:03,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:28:03,737 INFO L225 Difference]: With dead ends: 161 [2021-05-02 13:28:03,737 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 13:28:03,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 2408.6ms TimeCoverageRelationStatistics Valid=477, Invalid=4215, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 13:28:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 13:28:03,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2021-05-02 13:28:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 111 states have internal predecessors, (119), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 13:28:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2021-05-02 13:28:03,764 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 113 [2021-05-02 13:28:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:28:03,765 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2021-05-02 13:28:03,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 13:28:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2021-05-02 13:28:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 13:28:03,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:28:03,778 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 8, 7, 6, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:28:03,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 13:28:03,993 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:28:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:28:03,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1194761696, now seen corresponding path program 2 times [2021-05-02 13:28:03,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:28:03,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801991143] [2021-05-02 13:28:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:28:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:04,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:28:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:04,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:28:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:04,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 13:28:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:04,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 13:28:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:04,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 13:28:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:04,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-05-02 13:28:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:04,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-05-02 13:28:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:04,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-05-02 13:28:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:04,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-05-02 13:28:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:04,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 13:28:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:04,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 13:28:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:28:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 40 proven. 284 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-02 13:28:04,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:28:04,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801991143] [2021-05-02 13:28:04,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801991143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:28:04,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133443961] [2021-05-02 13:28:04,584 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 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