/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:18:03,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:18:03,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:18:03,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:18:03,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:18:03,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:18:03,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:18:03,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:18:03,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:18:03,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:18:03,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:18:03,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:18:03,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:18:03,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:18:03,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:18:03,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:18:03,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:18:03,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:18:03,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:18:03,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:18:03,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:18:03,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:18:03,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:18:03,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:18:03,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:18:03,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:18:03,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:18:03,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:18:03,749 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 [2020-08-22 16:18:03,799 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:18:03,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:18:03,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:18:03,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:18:03,802 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:18:03,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:18:03,803 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:18:03,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:18:03,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:18:03,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:18:03,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:18:03,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:18:03,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:18:03,806 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:18:03,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:18:03,806 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:18:03,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:18:03,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:18:03,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:18:03,807 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:18:03,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:18:03,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:18:03,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:18:03,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:18:03,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:18:03,808 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:18:03,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:18:03,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:18:03,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:18:03,809 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:18:04,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:18:04,167 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:18:04,171 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:18:04,173 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:18:04,173 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:18:04,174 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 16:18:04,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce940784a/10f3536957fe44e6937fd0e12046d849/FLAGb3dcc9dc1 [2020-08-22 16:18:04,737 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:18:04,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 16:18:04,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce940784a/10f3536957fe44e6937fd0e12046d849/FLAGb3dcc9dc1 [2020-08-22 16:18:05,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce940784a/10f3536957fe44e6937fd0e12046d849 [2020-08-22 16:18:05,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:18:05,107 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:18:05,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:18:05,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:18:05,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:18:05,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:18:05" (1/1) ... [2020-08-22 16:18:05,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f9153e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:05, skipping insertion in model container [2020-08-22 16:18:05,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:18:05" (1/1) ... [2020-08-22 16:18:05,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:18:05,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:18:05,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:18:05,402 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:18:05,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:18:05,547 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:18:05,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:05 WrapperNode [2020-08-22 16:18:05,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:18:05,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:18:05,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:18:05,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:18:05,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:05" (1/1) ... [2020-08-22 16:18:05,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:05" (1/1) ... [2020-08-22 16:18:05,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:05" (1/1) ... [2020-08-22 16:18:05,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:05" (1/1) ... [2020-08-22 16:18:05,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:05" (1/1) ... [2020-08-22 16:18:05,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:05" (1/1) ... [2020-08-22 16:18:05,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:05" (1/1) ... [2020-08-22 16:18:05,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:18:05,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:18:05,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:18:05,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:18:05,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:05" (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 [2020-08-22 16:18:05,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:18:05,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:18:05,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:18:05,684 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 16:18:05,684 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 16:18:05,684 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 16:18:05,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:18:05,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:18:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 16:18:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 16:18:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:18:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 16:18:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 16:18:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 16:18:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:18:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:18:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:18:06,200 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:18:06,200 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 16:18:06,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:18:06 BoogieIcfgContainer [2020-08-22 16:18:06,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:18:06,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:18:06,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:18:06,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:18:06,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:18:05" (1/3) ... [2020-08-22 16:18:06,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178a287c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:18:06, skipping insertion in model container [2020-08-22 16:18:06,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:05" (2/3) ... [2020-08-22 16:18:06,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178a287c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:18:06, skipping insertion in model container [2020-08-22 16:18:06,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:18:06" (3/3) ... [2020-08-22 16:18:06,215 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-08-22 16:18:06,227 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:18:06,237 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:18:06,253 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:18:06,278 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:18:06,278 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:18:06,278 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:18:06,278 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:18:06,279 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:18:06,279 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:18:06,279 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:18:06,279 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:18:06,298 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-22 16:18:06,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 16:18:06,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:06,308 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:06,308 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:06,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-22 16:18:06,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:06,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092660412] [2020-08-22 16:18:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 16:18:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 16:18:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:06,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092660412] [2020-08-22 16:18:06,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553875803] [2020-08-22 16:18:06,699 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 [2020-08-22 16:18:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-08-22 16:18:06,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 16:18:06,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:06,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-08-22 16:18:06,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936369640] [2020-08-22 16:18:06,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:18:06,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:06,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:18:06,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:18:06,903 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-08-22 16:18:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:06,964 INFO L93 Difference]: Finished difference Result 118 states and 174 transitions. [2020-08-22 16:18:06,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:18:06,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-08-22 16:18:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:06,979 INFO L225 Difference]: With dead ends: 118 [2020-08-22 16:18:06,979 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 16:18:06,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:18:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 16:18:07,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-22 16:18:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 16:18:07,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2020-08-22 16:18:07,037 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 48 [2020-08-22 16:18:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:07,039 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2020-08-22 16:18:07,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:18:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2020-08-22 16:18:07,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 16:18:07,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:07,043 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:07,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-08-22 16:18:07,259 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:07,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:07,262 INFO L82 PathProgramCache]: Analyzing trace with hash -880454641, now seen corresponding path program 1 times [2020-08-22 16:18:07,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:07,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244723870] [2020-08-22 16:18:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 16:18:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 16:18:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:07,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244723870] [2020-08-22 16:18:07,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235166533] [2020-08-22 16:18:07,459 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 [2020-08-22 16:18:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:18:07,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 16:18:07,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:07,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-08-22 16:18:07,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092267032] [2020-08-22 16:18:07,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:18:07,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:07,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:18:07,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:18:07,630 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 4 states. [2020-08-22 16:18:07,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:07,665 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-08-22 16:18:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:18:07,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-08-22 16:18:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:07,668 INFO L225 Difference]: With dead ends: 64 [2020-08-22 16:18:07,668 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 16:18:07,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:18:07,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 16:18:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-22 16:18:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 16:18:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2020-08-22 16:18:07,682 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 50 [2020-08-22 16:18:07,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:07,683 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2020-08-22 16:18:07,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:18:07,683 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2020-08-22 16:18:07,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 16:18:07,686 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:07,686 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:07,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:07,889 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:07,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1901522995, now seen corresponding path program 1 times [2020-08-22 16:18:07,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:07,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899169744] [2020-08-22 16:18:07,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 16:18:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 16:18:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:08,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899169744] [2020-08-22 16:18:08,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043389709] [2020-08-22 16:18:08,039 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 [2020-08-22 16:18:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2020-08-22 16:18:08,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:08,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:08,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-08-22 16:18:08,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478439754] [2020-08-22 16:18:08,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:18:08,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:08,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:18:08,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:18:08,183 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 8 states. [2020-08-22 16:18:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:08,336 INFO L93 Difference]: Finished difference Result 89 states and 121 transitions. [2020-08-22 16:18:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:18:08,337 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-08-22 16:18:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:08,341 INFO L225 Difference]: With dead ends: 89 [2020-08-22 16:18:08,341 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 16:18:08,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:18:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 16:18:08,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-08-22 16:18:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 16:18:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2020-08-22 16:18:08,359 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 50 [2020-08-22 16:18:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:08,360 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2020-08-22 16:18:08,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:18:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2020-08-22 16:18:08,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 16:18:08,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:08,363 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:08,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:08,577 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:08,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:08,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1643357557, now seen corresponding path program 1 times [2020-08-22 16:18:08,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:08,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020056661] [2020-08-22 16:18:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 16:18:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 16:18:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:08,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020056661] [2020-08-22 16:18:08,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82794167] [2020-08-22 16:18:08,657 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 [2020-08-22 16:18:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:08,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2020-08-22 16:18:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:08,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:08,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2020-08-22 16:18:08,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249205235] [2020-08-22 16:18:08,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:18:08,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:08,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:18:08,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:18:08,864 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand 7 states. [2020-08-22 16:18:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:08,958 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2020-08-22 16:18:08,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:18:08,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-08-22 16:18:08,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:08,961 INFO L225 Difference]: With dead ends: 75 [2020-08-22 16:18:08,961 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 16:18:08,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:18:08,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 16:18:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-08-22 16:18:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 16:18:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2020-08-22 16:18:08,974 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 50 [2020-08-22 16:18:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:08,975 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2020-08-22 16:18:08,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:18:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2020-08-22 16:18:08,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 16:18:08,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:08,978 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:09,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:09,192 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:09,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:09,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1046629615, now seen corresponding path program 1 times [2020-08-22 16:18:09,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:09,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649418414] [2020-08-22 16:18:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 16:18:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 16:18:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:09,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649418414] [2020-08-22 16:18:09,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73648742] [2020-08-22 16:18:09,286 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 [2020-08-22 16:18:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:18:09,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 16:18:09,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:09,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2020-08-22 16:18:09,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860429576] [2020-08-22 16:18:09,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:18:09,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:09,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:18:09,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:18:09,407 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand 6 states. [2020-08-22 16:18:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:09,454 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2020-08-22 16:18:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:18:09,455 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-08-22 16:18:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:09,459 INFO L225 Difference]: With dead ends: 73 [2020-08-22 16:18:09,460 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 16:18:09,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:18:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 16:18:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-08-22 16:18:09,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 16:18:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-08-22 16:18:09,470 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 52 [2020-08-22 16:18:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:09,471 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-08-22 16:18:09,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:18:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-08-22 16:18:09,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 16:18:09,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:09,474 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:09,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:09,688 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:09,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:09,689 INFO L82 PathProgramCache]: Analyzing trace with hash 989371313, now seen corresponding path program 1 times [2020-08-22 16:18:09,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:09,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380332108] [2020-08-22 16:18:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 16:18:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 16:18:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:09,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380332108] [2020-08-22 16:18:09,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697378374] [2020-08-22 16:18:09,810 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 [2020-08-22 16:18:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:09,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2020-08-22 16:18:09,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 16:18:09,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:09,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2020-08-22 16:18:09,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543285350] [2020-08-22 16:18:09,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:18:09,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:09,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:18:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:18:09,906 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 6 states. [2020-08-22 16:18:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:09,953 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2020-08-22 16:18:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:18:09,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-08-22 16:18:09,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:09,956 INFO L225 Difference]: With dead ends: 81 [2020-08-22 16:18:09,956 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 16:18:09,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:18:09,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 16:18:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-08-22 16:18:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 16:18:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2020-08-22 16:18:09,965 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 52 [2020-08-22 16:18:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:09,966 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2020-08-22 16:18:09,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:18:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2020-08-22 16:18:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 16:18:09,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:09,969 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:10,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:10,185 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:10,185 INFO L82 PathProgramCache]: Analyzing trace with hash -823640004, now seen corresponding path program 1 times [2020-08-22 16:18:10,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:10,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837360329] [2020-08-22 16:18:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 16:18:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 16:18:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:10,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837360329] [2020-08-22 16:18:10,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719209026] [2020-08-22 16:18:10,257 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 [2020-08-22 16:18:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:10,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2020-08-22 16:18:10,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:18:10,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:10,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10] total 12 [2020-08-22 16:18:10,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585374778] [2020-08-22 16:18:10,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:18:10,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:18:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:18:10,425 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand 12 states. [2020-08-22 16:18:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:10,889 INFO L93 Difference]: Finished difference Result 170 states and 241 transitions. [2020-08-22 16:18:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 16:18:10,890 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-08-22 16:18:10,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:10,892 INFO L225 Difference]: With dead ends: 170 [2020-08-22 16:18:10,892 INFO L226 Difference]: Without dead ends: 111 [2020-08-22 16:18:10,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:18:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-22 16:18:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-08-22 16:18:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 16:18:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 132 transitions. [2020-08-22 16:18:10,912 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 132 transitions. Word has length 54 [2020-08-22 16:18:10,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:10,912 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 132 transitions. [2020-08-22 16:18:10,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:18:10,913 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 132 transitions. [2020-08-22 16:18:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 16:18:10,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:10,915 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:11,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:11,130 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:11,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:11,130 INFO L82 PathProgramCache]: Analyzing trace with hash 37367501, now seen corresponding path program 1 times [2020-08-22 16:18:11,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:11,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932392829] [2020-08-22 16:18:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 16:18:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 16:18:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 16:18:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:11,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932392829] [2020-08-22 16:18:11,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386412326] [2020-08-22 16:18:11,203 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 [2020-08-22 16:18:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:18:11,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:11,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:11,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-08-22 16:18:11,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463352625] [2020-08-22 16:18:11,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:18:11,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:11,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:18:11,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:18:11,290 INFO L87 Difference]: Start difference. First operand 96 states and 132 transitions. Second operand 4 states. [2020-08-22 16:18:11,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:11,349 INFO L93 Difference]: Finished difference Result 185 states and 251 transitions. [2020-08-22 16:18:11,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:18:11,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-08-22 16:18:11,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:11,352 INFO L225 Difference]: With dead ends: 185 [2020-08-22 16:18:11,352 INFO L226 Difference]: Without dead ends: 105 [2020-08-22 16:18:11,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:18:11,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-22 16:18:11,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-08-22 16:18:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 16:18:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 142 transitions. [2020-08-22 16:18:11,367 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 142 transitions. Word has length 60 [2020-08-22 16:18:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:11,367 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 142 transitions. [2020-08-22 16:18:11,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:18:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 142 transitions. [2020-08-22 16:18:11,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 16:18:11,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:11,369 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:11,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-08-22 16:18:11,583 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:11,584 INFO L82 PathProgramCache]: Analyzing trace with hash -611141874, now seen corresponding path program 1 times [2020-08-22 16:18:11,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:11,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672360982] [2020-08-22 16:18:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 16:18:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 16:18:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 16:18:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:11,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672360982] [2020-08-22 16:18:11,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468110716] [2020-08-22 16:18:11,740 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 [2020-08-22 16:18:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:11,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:18:11,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:11,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:11,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-08-22 16:18:11,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011677462] [2020-08-22 16:18:11,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:18:11,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:11,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:18:11,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:18:11,869 INFO L87 Difference]: Start difference. First operand 105 states and 142 transitions. Second operand 5 states. [2020-08-22 16:18:12,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:12,008 INFO L93 Difference]: Finished difference Result 214 states and 296 transitions. [2020-08-22 16:18:12,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:18:12,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-08-22 16:18:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:12,011 INFO L225 Difference]: With dead ends: 214 [2020-08-22 16:18:12,013 INFO L226 Difference]: Without dead ends: 128 [2020-08-22 16:18:12,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:18:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-22 16:18:12,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2020-08-22 16:18:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 16:18:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 152 transitions. [2020-08-22 16:18:12,044 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 152 transitions. Word has length 62 [2020-08-22 16:18:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:12,044 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 152 transitions. [2020-08-22 16:18:12,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:18:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 152 transitions. [2020-08-22 16:18:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 16:18:12,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:12,050 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:12,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:12,263 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:12,264 INFO L82 PathProgramCache]: Analyzing trace with hash -299422308, now seen corresponding path program 1 times [2020-08-22 16:18:12,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:12,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891629270] [2020-08-22 16:18:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 16:18:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 16:18:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 16:18:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:12,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891629270] [2020-08-22 16:18:12,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247316185] [2020-08-22 16:18:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:18:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2020-08-22 16:18:12,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:12,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:12,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-08-22 16:18:12,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806732528] [2020-08-22 16:18:12,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:18:12,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:18:12,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:18:12,448 INFO L87 Difference]: Start difference. First operand 111 states and 152 transitions. Second operand 8 states. [2020-08-22 16:18:12,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:12,576 INFO L93 Difference]: Finished difference Result 220 states and 309 transitions. [2020-08-22 16:18:12,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:18:12,577 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-22 16:18:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:12,579 INFO L225 Difference]: With dead ends: 220 [2020-08-22 16:18:12,579 INFO L226 Difference]: Without dead ends: 128 [2020-08-22 16:18:12,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:18:12,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-22 16:18:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2020-08-22 16:18:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-08-22 16:18:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2020-08-22 16:18:12,594 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 63 [2020-08-22 16:18:12,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:12,594 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2020-08-22 16:18:12,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:18:12,595 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2020-08-22 16:18:12,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 16:18:12,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:12,596 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:12,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:12,813 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:12,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:12,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2143601123, now seen corresponding path program 1 times [2020-08-22 16:18:12,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:12,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326923822] [2020-08-22 16:18:12,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 16:18:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 16:18:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 16:18:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:12,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326923822] [2020-08-22 16:18:12,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894783125] [2020-08-22 16:18:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2020-08-22 16:18:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:13,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:13,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-08-22 16:18:13,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044383040] [2020-08-22 16:18:13,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:18:13,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:13,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:18:13,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:18:13,025 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand 10 states. [2020-08-22 16:18:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:13,305 INFO L93 Difference]: Finished difference Result 240 states and 336 transitions. [2020-08-22 16:18:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:18:13,305 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-08-22 16:18:13,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:13,307 INFO L225 Difference]: With dead ends: 240 [2020-08-22 16:18:13,309 INFO L226 Difference]: Without dead ends: 141 [2020-08-22 16:18:13,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:18:13,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-08-22 16:18:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 123. [2020-08-22 16:18:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-22 16:18:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 170 transitions. [2020-08-22 16:18:13,345 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 170 transitions. Word has length 65 [2020-08-22 16:18:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:13,346 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 170 transitions. [2020-08-22 16:18:13,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:18:13,347 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 170 transitions. [2020-08-22 16:18:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 16:18:13,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:13,350 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:13,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-08-22 16:18:13,564 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:13,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:13,564 INFO L82 PathProgramCache]: Analyzing trace with hash -561018771, now seen corresponding path program 2 times [2020-08-22 16:18:13,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:13,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769162762] [2020-08-22 16:18:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 16:18:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 16:18:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 16:18:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:13,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769162762] [2020-08-22 16:18:13,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115482884] [2020-08-22 16:18:13,675 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:13,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:13,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:13,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:18:13,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:13,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:13,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-08-22 16:18:13,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268889558] [2020-08-22 16:18:13,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:18:13,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:13,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:18:13,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:18:13,931 INFO L87 Difference]: Start difference. First operand 123 states and 170 transitions. Second operand 10 states. [2020-08-22 16:18:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:14,071 INFO L93 Difference]: Finished difference Result 240 states and 338 transitions. [2020-08-22 16:18:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:18:14,072 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-08-22 16:18:14,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:14,074 INFO L225 Difference]: With dead ends: 240 [2020-08-22 16:18:14,074 INFO L226 Difference]: Without dead ends: 141 [2020-08-22 16:18:14,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:18:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-08-22 16:18:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 127. [2020-08-22 16:18:14,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-22 16:18:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2020-08-22 16:18:14,087 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 66 [2020-08-22 16:18:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:14,088 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2020-08-22 16:18:14,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:18:14,088 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2020-08-22 16:18:14,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 16:18:14,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:14,090 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:14,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:14,298 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:14,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:14,299 INFO L82 PathProgramCache]: Analyzing trace with hash -134731602, now seen corresponding path program 2 times [2020-08-22 16:18:14,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:14,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350419146] [2020-08-22 16:18:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 16:18:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:18:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 16:18:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:14,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350419146] [2020-08-22 16:18:14,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980000380] [2020-08-22 16:18:14,437 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:14,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:14,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:14,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2020-08-22 16:18:14,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:14,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:14,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-08-22 16:18:14,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920528751] [2020-08-22 16:18:14,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:18:14,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:14,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:18:14,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:18:14,662 INFO L87 Difference]: Start difference. First operand 127 states and 175 transitions. Second operand 12 states. [2020-08-22 16:18:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:15,037 INFO L93 Difference]: Finished difference Result 253 states and 354 transitions. [2020-08-22 16:18:15,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:18:15,038 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-08-22 16:18:15,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:15,039 INFO L225 Difference]: With dead ends: 253 [2020-08-22 16:18:15,039 INFO L226 Difference]: Without dead ends: 151 [2020-08-22 16:18:15,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:18:15,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-22 16:18:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 129. [2020-08-22 16:18:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-22 16:18:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 178 transitions. [2020-08-22 16:18:15,054 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 178 transitions. Word has length 68 [2020-08-22 16:18:15,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:15,054 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 178 transitions. [2020-08-22 16:18:15,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:18:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 178 transitions. [2020-08-22 16:18:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 16:18:15,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:15,057 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:15,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-08-22 16:18:15,261 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:15,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:15,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1584394236, now seen corresponding path program 3 times [2020-08-22 16:18:15,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:15,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55497684] [2020-08-22 16:18:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:15,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:15,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:15,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:15,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:15,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 16:18:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:15,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 16:18:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:15,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 16:18:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:15,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55497684] [2020-08-22 16:18:15,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264206390] [2020-08-22 16:18:15,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:15,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-08-22 16:18:15,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:15,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2020-08-22 16:18:15,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-08-22 16:18:15,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:15,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2020-08-22 16:18:15,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528463610] [2020-08-22 16:18:15,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:18:15,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:15,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:18:15,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:18:15,523 INFO L87 Difference]: Start difference. First operand 129 states and 178 transitions. Second operand 14 states. [2020-08-22 16:18:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:15,922 INFO L93 Difference]: Finished difference Result 295 states and 429 transitions. [2020-08-22 16:18:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 16:18:15,923 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-08-22 16:18:15,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:15,925 INFO L225 Difference]: With dead ends: 295 [2020-08-22 16:18:15,925 INFO L226 Difference]: Without dead ends: 193 [2020-08-22 16:18:15,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-08-22 16:18:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-22 16:18:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 160. [2020-08-22 16:18:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-22 16:18:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 228 transitions. [2020-08-22 16:18:15,943 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 228 transitions. Word has length 69 [2020-08-22 16:18:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:15,944 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 228 transitions. [2020-08-22 16:18:15,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:18:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 228 transitions. [2020-08-22 16:18:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 16:18:15,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:15,946 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:16,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:16,159 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:16,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1256997633, now seen corresponding path program 1 times [2020-08-22 16:18:16,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:16,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683459245] [2020-08-22 16:18:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:18:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 16:18:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 16:18:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:16,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683459245] [2020-08-22 16:18:16,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750831868] [2020-08-22 16:18:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:16,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2020-08-22 16:18:16,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:16,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:16,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-08-22 16:18:16,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067400697] [2020-08-22 16:18:16,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:18:16,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:16,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:18:16,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:18:16,467 INFO L87 Difference]: Start difference. First operand 160 states and 228 transitions. Second operand 14 states. [2020-08-22 16:18:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:16,866 INFO L93 Difference]: Finished difference Result 320 states and 464 transitions. [2020-08-22 16:18:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:18:16,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2020-08-22 16:18:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:16,871 INFO L225 Difference]: With dead ends: 320 [2020-08-22 16:18:16,871 INFO L226 Difference]: Without dead ends: 188 [2020-08-22 16:18:16,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:18:16,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-22 16:18:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 162. [2020-08-22 16:18:16,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 16:18:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 231 transitions. [2020-08-22 16:18:16,894 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 231 transitions. Word has length 71 [2020-08-22 16:18:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:16,895 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 231 transitions. [2020-08-22 16:18:16,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:18:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 231 transitions. [2020-08-22 16:18:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 16:18:16,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:16,897 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:17,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-08-22 16:18:17,100 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:17,101 INFO L82 PathProgramCache]: Analyzing trace with hash 895090319, now seen corresponding path program 1 times [2020-08-22 16:18:17,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:17,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296537388] [2020-08-22 16:18:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:17,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:17,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:17,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:17,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 16:18:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:17,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 16:18:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:17,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 16:18:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:17,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296537388] [2020-08-22 16:18:17,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672611371] [2020-08-22 16:18:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:17,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:18:17,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:17,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:17,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-08-22 16:18:17,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304875131] [2020-08-22 16:18:17,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:18:17,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:17,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:18:17,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:18:17,391 INFO L87 Difference]: Start difference. First operand 162 states and 231 transitions. Second operand 14 states. [2020-08-22 16:18:17,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:17,659 INFO L93 Difference]: Finished difference Result 326 states and 484 transitions. [2020-08-22 16:18:17,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 16:18:17,660 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 72 [2020-08-22 16:18:17,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:17,663 INFO L225 Difference]: With dead ends: 326 [2020-08-22 16:18:17,663 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 16:18:17,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:18:17,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 16:18:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 166. [2020-08-22 16:18:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-08-22 16:18:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 236 transitions. [2020-08-22 16:18:17,696 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 236 transitions. Word has length 72 [2020-08-22 16:18:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:17,696 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 236 transitions. [2020-08-22 16:18:17,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:18:17,697 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 236 transitions. [2020-08-22 16:18:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 16:18:17,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:17,699 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:17,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-08-22 16:18:17,915 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:17,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:17,916 INFO L82 PathProgramCache]: Analyzing trace with hash -664750384, now seen corresponding path program 2 times [2020-08-22 16:18:17,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:17,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184436195] [2020-08-22 16:18:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:17,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:17,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:17,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:18,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 16:18:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:18,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 16:18:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:18,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 16:18:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:18,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184436195] [2020-08-22 16:18:18,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100843408] [2020-08-22 16:18:18,097 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:18,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:18,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:18,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2020-08-22 16:18:18,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:18,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:18,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-08-22 16:18:18,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287164024] [2020-08-22 16:18:18,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 16:18:18,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:18,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 16:18:18,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:18:18,480 INFO L87 Difference]: Start difference. First operand 166 states and 236 transitions. Second operand 16 states. [2020-08-22 16:18:18,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:18,974 INFO L93 Difference]: Finished difference Result 333 states and 482 transitions. [2020-08-22 16:18:18,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 16:18:18,975 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-08-22 16:18:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:18,978 INFO L225 Difference]: With dead ends: 333 [2020-08-22 16:18:18,979 INFO L226 Difference]: Without dead ends: 198 [2020-08-22 16:18:18,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-08-22 16:18:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-22 16:18:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 168. [2020-08-22 16:18:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 16:18:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 239 transitions. [2020-08-22 16:18:19,003 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 239 transitions. Word has length 74 [2020-08-22 16:18:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:19,003 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 239 transitions. [2020-08-22 16:18:19,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 16:18:19,004 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 239 transitions. [2020-08-22 16:18:19,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 16:18:19,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:19,006 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:19,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-08-22 16:18:19,211 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:19,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:19,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2074885854, now seen corresponding path program 2 times [2020-08-22 16:18:19,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:19,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997896690] [2020-08-22 16:18:19,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:18:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 16:18:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 16:18:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:19,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997896690] [2020-08-22 16:18:19,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603941840] [2020-08-22 16:18:19,328 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:19,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:19,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:19,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:18:19,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:19,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:19,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-08-22 16:18:19,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458637630] [2020-08-22 16:18:19,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 16:18:19,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:19,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 16:18:19,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:18:19,527 INFO L87 Difference]: Start difference. First operand 168 states and 239 transitions. Second operand 16 states. [2020-08-22 16:18:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:19,746 INFO L93 Difference]: Finished difference Result 342 states and 510 transitions. [2020-08-22 16:18:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:18:19,747 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-08-22 16:18:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:19,749 INFO L225 Difference]: With dead ends: 342 [2020-08-22 16:18:19,750 INFO L226 Difference]: Without dead ends: 207 [2020-08-22 16:18:19,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=339, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:18:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-08-22 16:18:19,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 172. [2020-08-22 16:18:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-08-22 16:18:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 244 transitions. [2020-08-22 16:18:19,769 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 244 transitions. Word has length 75 [2020-08-22 16:18:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:19,770 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 244 transitions. [2020-08-22 16:18:19,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 16:18:19,770 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 244 transitions. [2020-08-22 16:18:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 16:18:19,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:19,772 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:19,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-08-22 16:18:19,986 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:19,987 INFO L82 PathProgramCache]: Analyzing trace with hash -752607393, now seen corresponding path program 3 times [2020-08-22 16:18:19,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:19,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162348154] [2020-08-22 16:18:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:20,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:20,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:20,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:20,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 16:18:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:20,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 16:18:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:20,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 16:18:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:18:20,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162348154] [2020-08-22 16:18:20,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775580933] [2020-08-22 16:18:20,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:20,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-08-22 16:18:20,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:20,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-08-22 16:18:20,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-08-22 16:18:20,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:20,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-08-22 16:18:20,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531231137] [2020-08-22 16:18:20,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 16:18:20,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:20,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 16:18:20,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:18:20,480 INFO L87 Difference]: Start difference. First operand 172 states and 244 transitions. Second operand 17 states. [2020-08-22 16:18:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:21,505 INFO L93 Difference]: Finished difference Result 340 states and 492 transitions. [2020-08-22 16:18:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 16:18:21,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-08-22 16:18:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:21,508 INFO L225 Difference]: With dead ends: 340 [2020-08-22 16:18:21,508 INFO L226 Difference]: Without dead ends: 201 [2020-08-22 16:18:21,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 16:18:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-08-22 16:18:21,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2020-08-22 16:18:21,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-22 16:18:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 214 transitions. [2020-08-22 16:18:21,527 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 214 transitions. Word has length 77 [2020-08-22 16:18:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:21,527 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 214 transitions. [2020-08-22 16:18:21,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 16:18:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 214 transitions. [2020-08-22 16:18:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 16:18:21,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:21,530 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:21,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:21,734 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1997634884, now seen corresponding path program 1 times [2020-08-22 16:18:21,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:21,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074163653] [2020-08-22 16:18:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 16:18:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 16:18:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 16:18:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 16:18:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:21,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074163653] [2020-08-22 16:18:21,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109240306] [2020-08-22 16:18:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:21,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2020-08-22 16:18:21,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:22,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:22,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-08-22 16:18:22,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806724540] [2020-08-22 16:18:22,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 16:18:22,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:22,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 16:18:22,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:18:22,093 INFO L87 Difference]: Start difference. First operand 156 states and 214 transitions. Second operand 18 states. [2020-08-22 16:18:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:22,397 INFO L93 Difference]: Finished difference Result 328 states and 465 transitions. [2020-08-22 16:18:22,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 16:18:22,398 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-08-22 16:18:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:22,400 INFO L225 Difference]: With dead ends: 328 [2020-08-22 16:18:22,401 INFO L226 Difference]: Without dead ends: 207 [2020-08-22 16:18:22,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=431, Unknown=0, NotChecked=0, Total=702 [2020-08-22 16:18:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-08-22 16:18:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 161. [2020-08-22 16:18:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-22 16:18:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 221 transitions. [2020-08-22 16:18:22,425 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 221 transitions. Word has length 79 [2020-08-22 16:18:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:22,425 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 221 transitions. [2020-08-22 16:18:22,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 16:18:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 221 transitions. [2020-08-22 16:18:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 16:18:22,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:22,428 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:22,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:22,643 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:22,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1850379747, now seen corresponding path program 1 times [2020-08-22 16:18:22,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:22,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006470302] [2020-08-22 16:18:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 16:18:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 16:18:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 16:18:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 16:18:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:22,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006470302] [2020-08-22 16:18:22,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954187714] [2020-08-22 16:18:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:22,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:18:22,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-08-22 16:18:22,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:22,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2020-08-22 16:18:22,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210294788] [2020-08-22 16:18:22,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:18:22,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:22,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:18:22,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:18:22,937 INFO L87 Difference]: Start difference. First operand 161 states and 221 transitions. Second operand 4 states. [2020-08-22 16:18:23,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:23,014 INFO L93 Difference]: Finished difference Result 273 states and 374 transitions. [2020-08-22 16:18:23,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:18:23,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-08-22 16:18:23,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:23,017 INFO L225 Difference]: With dead ends: 273 [2020-08-22 16:18:23,017 INFO L226 Difference]: Without dead ends: 165 [2020-08-22 16:18:23,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:18:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-08-22 16:18:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 151. [2020-08-22 16:18:23,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-08-22 16:18:23,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 200 transitions. [2020-08-22 16:18:23,031 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 200 transitions. Word has length 81 [2020-08-22 16:18:23,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:23,031 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 200 transitions. [2020-08-22 16:18:23,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:18:23,031 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 200 transitions. [2020-08-22 16:18:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 16:18:23,033 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:23,033 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:23,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-08-22 16:18:23,246 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:23,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:23,247 INFO L82 PathProgramCache]: Analyzing trace with hash 825317405, now seen corresponding path program 1 times [2020-08-22 16:18:23,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:23,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303223594] [2020-08-22 16:18:23,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 16:18:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 16:18:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 16:18:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:23,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303223594] [2020-08-22 16:18:23,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592353927] [2020-08-22 16:18:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:23,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjunts are in the unsatisfiable core [2020-08-22 16:18:23,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 63 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:23,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:23,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-08-22 16:18:23,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207749686] [2020-08-22 16:18:23,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 16:18:23,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:23,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 16:18:23,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:18:23,743 INFO L87 Difference]: Start difference. First operand 151 states and 200 transitions. Second operand 20 states. [2020-08-22 16:18:24,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:24,568 INFO L93 Difference]: Finished difference Result 313 states and 420 transitions. [2020-08-22 16:18:24,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 16:18:24,572 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 84 [2020-08-22 16:18:24,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:24,574 INFO L225 Difference]: With dead ends: 313 [2020-08-22 16:18:24,574 INFO L226 Difference]: Without dead ends: 199 [2020-08-22 16:18:24,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-08-22 16:18:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-08-22 16:18:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 153. [2020-08-22 16:18:24,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-08-22 16:18:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 203 transitions. [2020-08-22 16:18:24,595 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 203 transitions. Word has length 84 [2020-08-22 16:18:24,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:24,596 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 203 transitions. [2020-08-22 16:18:24,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 16:18:24,596 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 203 transitions. [2020-08-22 16:18:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 16:18:24,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:24,599 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:24,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:24,814 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:24,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1994914283, now seen corresponding path program 1 times [2020-08-22 16:18:24,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:24,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836990091] [2020-08-22 16:18:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 16:18:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 16:18:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 16:18:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 87 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:24,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836990091] [2020-08-22 16:18:24,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683374196] [2020-08-22 16:18:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2020-08-22 16:18:25,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 26 proven. 77 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:25,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:25,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-08-22 16:18:25,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790898793] [2020-08-22 16:18:25,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 16:18:25,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:25,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 16:18:25,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:18:25,147 INFO L87 Difference]: Start difference. First operand 153 states and 203 transitions. Second operand 20 states. [2020-08-22 16:18:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:25,518 INFO L93 Difference]: Finished difference Result 334 states and 467 transitions. [2020-08-22 16:18:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 16:18:25,519 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-08-22 16:18:25,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:25,521 INFO L225 Difference]: With dead ends: 334 [2020-08-22 16:18:25,521 INFO L226 Difference]: Without dead ends: 220 [2020-08-22 16:18:25,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=336, Invalid=534, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:18:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-22 16:18:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 157. [2020-08-22 16:18:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 16:18:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 208 transitions. [2020-08-22 16:18:25,537 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 208 transitions. Word has length 85 [2020-08-22 16:18:25,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:25,538 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 208 transitions. [2020-08-22 16:18:25,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 16:18:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 208 transitions. [2020-08-22 16:18:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 16:18:25,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:25,540 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:25,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-08-22 16:18:25,755 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:25,755 INFO L82 PathProgramCache]: Analyzing trace with hash -393045524, now seen corresponding path program 2 times [2020-08-22 16:18:25,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:25,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732577059] [2020-08-22 16:18:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:25,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:25,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:25,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:25,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 16:18:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:25,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 16:18:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:25,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 16:18:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 95 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:26,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732577059] [2020-08-22 16:18:26,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072630146] [2020-08-22 16:18:26,016 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:26,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:26,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:26,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2020-08-22 16:18:26,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 27 proven. 84 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:26,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:26,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-08-22 16:18:26,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552938045] [2020-08-22 16:18:26,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 16:18:26,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:26,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 16:18:26,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:18:26,315 INFO L87 Difference]: Start difference. First operand 157 states and 208 transitions. Second operand 22 states. [2020-08-22 16:18:27,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:27,337 INFO L93 Difference]: Finished difference Result 326 states and 437 transitions. [2020-08-22 16:18:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 16:18:27,338 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2020-08-22 16:18:27,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:27,340 INFO L225 Difference]: With dead ends: 326 [2020-08-22 16:18:27,340 INFO L226 Difference]: Without dead ends: 209 [2020-08-22 16:18:27,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:18:27,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-08-22 16:18:27,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 159. [2020-08-22 16:18:27,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-08-22 16:18:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 211 transitions. [2020-08-22 16:18:27,354 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 211 transitions. Word has length 87 [2020-08-22 16:18:27,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:27,355 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 211 transitions. [2020-08-22 16:18:27,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 16:18:27,355 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 211 transitions. [2020-08-22 16:18:27,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 16:18:27,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:27,357 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:27,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:27,571 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:27,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:27,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1414598148, now seen corresponding path program 2 times [2020-08-22 16:18:27,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:27,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602628734] [2020-08-22 16:18:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 16:18:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 16:18:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 16:18:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 110 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:27,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602628734] [2020-08-22 16:18:27,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377474619] [2020-08-22 16:18:27,721 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:27,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:27,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:27,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjunts are in the unsatisfiable core [2020-08-22 16:18:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 26 proven. 100 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:28,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:28,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-08-22 16:18:28,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771319478] [2020-08-22 16:18:28,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 16:18:28,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:28,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 16:18:28,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:18:28,033 INFO L87 Difference]: Start difference. First operand 159 states and 211 transitions. Second operand 22 states. [2020-08-22 16:18:28,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:28,525 INFO L93 Difference]: Finished difference Result 350 states and 491 transitions. [2020-08-22 16:18:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 16:18:28,526 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 88 [2020-08-22 16:18:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:28,530 INFO L225 Difference]: With dead ends: 350 [2020-08-22 16:18:28,531 INFO L226 Difference]: Without dead ends: 233 [2020-08-22 16:18:28,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 16:18:28,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-08-22 16:18:28,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-08-22 16:18:28,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-08-22 16:18:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 216 transitions. [2020-08-22 16:18:28,555 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 216 transitions. Word has length 88 [2020-08-22 16:18:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:28,556 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 216 transitions. [2020-08-22 16:18:28,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 16:18:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 216 transitions. [2020-08-22 16:18:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 16:18:28,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:28,558 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:28,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-08-22 16:18:28,772 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:28,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:28,773 INFO L82 PathProgramCache]: Analyzing trace with hash 125555133, now seen corresponding path program 3 times [2020-08-22 16:18:28,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:28,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464310728] [2020-08-22 16:18:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:28,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:28,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:28,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:28,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 16:18:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:29,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 16:18:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:29,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 16:18:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 4 proven. 119 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:29,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464310728] [2020-08-22 16:18:29,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922516591] [2020-08-22 16:18:29,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:29,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-08-22 16:18:29,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:29,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-08-22 16:18:29,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-08-22 16:18:29,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:29,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2020-08-22 16:18:29,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714293399] [2020-08-22 16:18:29,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 16:18:29,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:29,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 16:18:29,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-08-22 16:18:29,344 INFO L87 Difference]: Start difference. First operand 163 states and 216 transitions. Second operand 19 states. [2020-08-22 16:18:29,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:29,995 INFO L93 Difference]: Finished difference Result 360 states and 496 transitions. [2020-08-22 16:18:29,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 16:18:29,996 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-08-22 16:18:29,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:29,999 INFO L225 Difference]: With dead ends: 360 [2020-08-22 16:18:29,999 INFO L226 Difference]: Without dead ends: 246 [2020-08-22 16:18:30,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:18:30,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-08-22 16:18:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 194. [2020-08-22 16:18:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-08-22 16:18:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 265 transitions. [2020-08-22 16:18:30,016 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 265 transitions. Word has length 90 [2020-08-22 16:18:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:30,017 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 265 transitions. [2020-08-22 16:18:30,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 16:18:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 265 transitions. [2020-08-22 16:18:30,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 16:18:30,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:30,019 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:30,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-08-22 16:18:30,222 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:30,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:30,223 INFO L82 PathProgramCache]: Analyzing trace with hash 497256653, now seen corresponding path program 1 times [2020-08-22 16:18:30,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:30,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919659444] [2020-08-22 16:18:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:30,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:30,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:30,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:30,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 16:18:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:30,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 16:18:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:30,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 16:18:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:30,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919659444] [2020-08-22 16:18:30,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817309724] [2020-08-22 16:18:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:30,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2020-08-22 16:18:30,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 26 proven. 126 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:30,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:30,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-08-22 16:18:30,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421393155] [2020-08-22 16:18:30,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 16:18:30,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:30,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 16:18:30,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=344, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:18:30,659 INFO L87 Difference]: Start difference. First operand 194 states and 265 transitions. Second operand 24 states. [2020-08-22 16:18:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:31,024 INFO L93 Difference]: Finished difference Result 430 states and 635 transitions. [2020-08-22 16:18:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 16:18:31,025 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2020-08-22 16:18:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:31,028 INFO L225 Difference]: With dead ends: 430 [2020-08-22 16:18:31,028 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 16:18:31,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=487, Invalid=773, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 16:18:31,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 16:18:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 199. [2020-08-22 16:18:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-08-22 16:18:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 272 transitions. [2020-08-22 16:18:31,064 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 272 transitions. Word has length 91 [2020-08-22 16:18:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:31,065 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 272 transitions. [2020-08-22 16:18:31,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 16:18:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 272 transitions. [2020-08-22 16:18:31,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 16:18:31,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:31,067 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:31,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-08-22 16:18:31,280 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:31,281 INFO L82 PathProgramCache]: Analyzing trace with hash -519499570, now seen corresponding path program 1 times [2020-08-22 16:18:31,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:31,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314134900] [2020-08-22 16:18:31,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 16:18:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 16:18:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 16:18:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 4 proven. 146 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:31,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314134900] [2020-08-22 16:18:31,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175933239] [2020-08-22 16:18:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:31,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2020-08-22 16:18:31,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 27 proven. 135 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:31,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:31,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-08-22 16:18:31,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217960258] [2020-08-22 16:18:31,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 16:18:31,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:31,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 16:18:31,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:18:31,997 INFO L87 Difference]: Start difference. First operand 199 states and 272 transitions. Second operand 26 states. [2020-08-22 16:18:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:33,462 INFO L93 Difference]: Finished difference Result 413 states and 570 transitions. [2020-08-22 16:18:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 16:18:33,463 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 93 [2020-08-22 16:18:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:33,467 INFO L225 Difference]: With dead ends: 413 [2020-08-22 16:18:33,468 INFO L226 Difference]: Without dead ends: 260 [2020-08-22 16:18:33,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 16:18:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-22 16:18:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 201. [2020-08-22 16:18:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-08-22 16:18:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 275 transitions. [2020-08-22 16:18:33,496 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 275 transitions. Word has length 93 [2020-08-22 16:18:33,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:33,496 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 275 transitions. [2020-08-22 16:18:33,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 16:18:33,496 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 275 transitions. [2020-08-22 16:18:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 16:18:33,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:33,499 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:33,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-08-22 16:18:33,712 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:33,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:33,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1298501602, now seen corresponding path program 2 times [2020-08-22 16:18:33,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:33,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191056594] [2020-08-22 16:18:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:33,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:33,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:33,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:33,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 16:18:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:33,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 16:18:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:33,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 16:18:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 165 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:33,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191056594] [2020-08-22 16:18:33,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698600686] [2020-08-22 16:18:33,943 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:34,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:34,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2020-08-22 16:18:34,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 26 proven. 155 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:34,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:34,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-08-22 16:18:34,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222129158] [2020-08-22 16:18:34,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 16:18:34,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:34,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 16:18:34,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:18:34,249 INFO L87 Difference]: Start difference. First operand 201 states and 275 transitions. Second operand 26 states. [2020-08-22 16:18:34,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:34,840 INFO L93 Difference]: Finished difference Result 446 states and 661 transitions. [2020-08-22 16:18:34,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 16:18:34,841 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 94 [2020-08-22 16:18:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:34,845 INFO L225 Difference]: With dead ends: 446 [2020-08-22 16:18:34,846 INFO L226 Difference]: Without dead ends: 293 [2020-08-22 16:18:34,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=573, Invalid=909, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 16:18:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-08-22 16:18:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 205. [2020-08-22 16:18:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-08-22 16:18:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 280 transitions. [2020-08-22 16:18:34,884 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 280 transitions. Word has length 94 [2020-08-22 16:18:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:34,885 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 280 transitions. [2020-08-22 16:18:34,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 16:18:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 280 transitions. [2020-08-22 16:18:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 16:18:34,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:34,889 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:35,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-08-22 16:18:35,095 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:35,095 INFO L82 PathProgramCache]: Analyzing trace with hash 333670367, now seen corresponding path program 2 times [2020-08-22 16:18:35,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:35,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546877319] [2020-08-22 16:18:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 16:18:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 16:18:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 16:18:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 4 proven. 176 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:35,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546877319] [2020-08-22 16:18:35,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418193712] [2020-08-22 16:18:35,482 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:35,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:35,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:35,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 27 conjunts are in the unsatisfiable core [2020-08-22 16:18:35,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 27 proven. 165 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:36,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:36,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-08-22 16:18:36,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405007860] [2020-08-22 16:18:36,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 16:18:36,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:36,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 16:18:36,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:18:36,026 INFO L87 Difference]: Start difference. First operand 205 states and 280 transitions. Second operand 28 states. [2020-08-22 16:18:37,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:37,608 INFO L93 Difference]: Finished difference Result 426 states and 587 transitions. [2020-08-22 16:18:37,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 16:18:37,609 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 96 [2020-08-22 16:18:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:37,611 INFO L225 Difference]: With dead ends: 426 [2020-08-22 16:18:37,611 INFO L226 Difference]: Without dead ends: 270 [2020-08-22 16:18:37,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=308, Invalid=1332, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 16:18:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-08-22 16:18:37,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 207. [2020-08-22 16:18:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-08-22 16:18:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 283 transitions. [2020-08-22 16:18:37,631 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 283 transitions. Word has length 96 [2020-08-22 16:18:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:37,631 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 283 transitions. [2020-08-22 16:18:37,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 16:18:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 283 transitions. [2020-08-22 16:18:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 16:18:37,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:37,634 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:37,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:37,837 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:37,837 INFO L82 PathProgramCache]: Analyzing trace with hash -620037331, now seen corresponding path program 3 times [2020-08-22 16:18:37,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:37,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80338379] [2020-08-22 16:18:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:37,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:37,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:37,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:38,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 16:18:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:38,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 16:18:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:38,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 16:18:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 197 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:18:38,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80338379] [2020-08-22 16:18:38,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466238745] [2020-08-22 16:18:38,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:38,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-08-22 16:18:38,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:38,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2020-08-22 16:18:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-08-22 16:18:38,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:38,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2020-08-22 16:18:38,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588996368] [2020-08-22 16:18:38,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 16:18:38,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:38,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 16:18:38,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:18:38,448 INFO L87 Difference]: Start difference. First operand 207 states and 283 transitions. Second operand 22 states. [2020-08-22 16:18:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:39,118 INFO L93 Difference]: Finished difference Result 428 states and 647 transitions. [2020-08-22 16:18:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 16:18:39,119 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 97 [2020-08-22 16:18:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:39,121 INFO L225 Difference]: With dead ends: 428 [2020-08-22 16:18:39,122 INFO L226 Difference]: Without dead ends: 251 [2020-08-22 16:18:39,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:18:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-08-22 16:18:39,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 182. [2020-08-22 16:18:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-22 16:18:39,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 245 transitions. [2020-08-22 16:18:39,143 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 245 transitions. Word has length 97 [2020-08-22 16:18:39,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:39,144 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 245 transitions. [2020-08-22 16:18:39,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 16:18:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 245 transitions. [2020-08-22 16:18:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 16:18:39,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:39,146 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 16, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:39,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:39,349 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:39,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:39,350 INFO L82 PathProgramCache]: Analyzing trace with hash 497796668, now seen corresponding path program 1 times [2020-08-22 16:18:39,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:39,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891599889] [2020-08-22 16:18:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:39,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:39,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:39,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 16:18:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:39,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 16:18:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:39,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 16:18:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:39,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 16:18:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 222 proven. 207 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-22 16:18:39,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891599889] [2020-08-22 16:18:39,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928856012] [2020-08-22 16:18:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:39,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:18:39,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 244 proven. 198 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-08-22 16:18:40,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:40,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-08-22 16:18:40,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74845697] [2020-08-22 16:18:40,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 16:18:40,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:40,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 16:18:40,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:18:40,264 INFO L87 Difference]: Start difference. First operand 182 states and 245 transitions. Second operand 30 states. [2020-08-22 16:18:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:41,997 INFO L93 Difference]: Finished difference Result 390 states and 524 transitions. [2020-08-22 16:18:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 16:18:41,998 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 112 [2020-08-22 16:18:41,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:42,000 INFO L225 Difference]: With dead ends: 390 [2020-08-22 16:18:42,001 INFO L226 Difference]: Without dead ends: 253 [2020-08-22 16:18:42,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=346, Invalid=1546, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 16:18:42,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-08-22 16:18:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 186. [2020-08-22 16:18:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 16:18:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 250 transitions. [2020-08-22 16:18:42,022 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 250 transitions. Word has length 112 [2020-08-22 16:18:42,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:42,022 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 250 transitions. [2020-08-22 16:18:42,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 16:18:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 250 transitions. [2020-08-22 16:18:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 16:18:42,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:42,024 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 17, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:42,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-08-22 16:18:42,237 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:42,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1413760858, now seen corresponding path program 1 times [2020-08-22 16:18:42,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:42,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381594003] [2020-08-22 16:18:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 16:18:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 16:18:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 16:18:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 16:18:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 233 proven. 231 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-22 16:18:42,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381594003] [2020-08-22 16:18:42,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575087638] [2020-08-22 16:18:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:42,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 15 conjunts are in the unsatisfiable core [2020-08-22 16:18:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 255 proven. 222 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-08-22 16:18:42,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:42,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-08-22 16:18:42,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926609484] [2020-08-22 16:18:42,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 16:18:42,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:42,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 16:18:42,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=542, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:18:42,803 INFO L87 Difference]: Start difference. First operand 186 states and 250 transitions. Second operand 30 states. [2020-08-22 16:18:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:43,364 INFO L93 Difference]: Finished difference Result 427 states and 594 transitions. [2020-08-22 16:18:43,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 16:18:43,365 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 113 [2020-08-22 16:18:43,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:43,367 INFO L225 Difference]: With dead ends: 427 [2020-08-22 16:18:43,368 INFO L226 Difference]: Without dead ends: 295 [2020-08-22 16:18:43,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=766, Invalid=1214, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 16:18:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-22 16:18:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 188. [2020-08-22 16:18:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-22 16:18:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 253 transitions. [2020-08-22 16:18:43,391 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 253 transitions. Word has length 113 [2020-08-22 16:18:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:43,392 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 253 transitions. [2020-08-22 16:18:43,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 16:18:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 253 transitions. [2020-08-22 16:18:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 16:18:43,393 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:43,393 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:43,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:43,609 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:43,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:43,610 INFO L82 PathProgramCache]: Analyzing trace with hash 559118533, now seen corresponding path program 2 times [2020-08-22 16:18:43,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:43,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777300037] [2020-08-22 16:18:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 16:18:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:43,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 16:18:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:44,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 16:18:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:44,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 16:18:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 240 proven. 243 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-22 16:18:44,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777300037] [2020-08-22 16:18:44,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811637847] [2020-08-22 16:18:44,031 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:44,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:44,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:44,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 31 conjunts are in the unsatisfiable core [2020-08-22 16:18:44,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 262 proven. 234 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-08-22 16:18:44,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:44,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-08-22 16:18:44,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25210035] [2020-08-22 16:18:44,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 16:18:44,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:44,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 16:18:44,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:18:44,646 INFO L87 Difference]: Start difference. First operand 188 states and 253 transitions. Second operand 32 states. [2020-08-22 16:18:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:46,732 INFO L93 Difference]: Finished difference Result 403 states and 541 transitions. [2020-08-22 16:18:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 16:18:46,733 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 115 [2020-08-22 16:18:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:46,736 INFO L225 Difference]: With dead ends: 403 [2020-08-22 16:18:46,736 INFO L226 Difference]: Without dead ends: 263 [2020-08-22 16:18:46,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=386, Invalid=1776, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 16:18:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-08-22 16:18:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 192. [2020-08-22 16:18:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-22 16:18:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 258 transitions. [2020-08-22 16:18:46,755 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 258 transitions. Word has length 115 [2020-08-22 16:18:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:46,756 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 258 transitions. [2020-08-22 16:18:46,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 16:18:46,756 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 258 transitions. [2020-08-22 16:18:46,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 16:18:46,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:46,758 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 18, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:46,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-08-22 16:18:46,971 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:46,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:46,972 INFO L82 PathProgramCache]: Analyzing trace with hash 487216957, now seen corresponding path program 2 times [2020-08-22 16:18:46,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:46,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444072293] [2020-08-22 16:18:46,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:47,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:47,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:47,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 16:18:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:47,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 16:18:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:47,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 16:18:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:47,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 16:18:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 251 proven. 269 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-22 16:18:47,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444072293] [2020-08-22 16:18:47,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957360200] [2020-08-22 16:18:47,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:47,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:18:47,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:47,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 16 conjunts are in the unsatisfiable core [2020-08-22 16:18:47,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 273 proven. 260 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-08-22 16:18:47,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:47,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-08-22 16:18:47,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324783960] [2020-08-22 16:18:47,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 16:18:47,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:47,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 16:18:47,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=618, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:18:47,571 INFO L87 Difference]: Start difference. First operand 192 states and 258 transitions. Second operand 32 states. [2020-08-22 16:18:48,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:48,204 INFO L93 Difference]: Finished difference Result 443 states and 617 transitions. [2020-08-22 16:18:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 16:18:48,212 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 116 [2020-08-22 16:18:48,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:48,214 INFO L225 Difference]: With dead ends: 443 [2020-08-22 16:18:48,214 INFO L226 Difference]: Without dead ends: 308 [2020-08-22 16:18:48,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=873, Invalid=1383, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 16:18:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-08-22 16:18:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 194. [2020-08-22 16:18:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-08-22 16:18:48,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 261 transitions. [2020-08-22 16:18:48,248 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 261 transitions. Word has length 116 [2020-08-22 16:18:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:48,249 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 261 transitions. [2020-08-22 16:18:48,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 16:18:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 261 transitions. [2020-08-22 16:18:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 16:18:48,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:48,251 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 18, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:18:48,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:48,466 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:48,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:48,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2037697948, now seen corresponding path program 3 times [2020-08-22 16:18:48,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:48,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307803663] [2020-08-22 16:18:48,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:48,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:48,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:48,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 16:18:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:48,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 16:18:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:48,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 16:18:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:48,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 16:18:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 258 proven. 282 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-22 16:18:48,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307803663] [2020-08-22 16:18:48,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480869925] [2020-08-22 16:18:48,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:49,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-08-22 16:18:49,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:18:49,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:18:49,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-08-22 16:18:49,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:49,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2020-08-22 16:18:49,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998254022] [2020-08-22 16:18:49,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:18:49,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:49,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:18:49,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:18:49,096 INFO L87 Difference]: Start difference. First operand 194 states and 261 transitions. Second operand 4 states. [2020-08-22 16:18:49,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:49,169 INFO L93 Difference]: Finished difference Result 214 states and 281 transitions. [2020-08-22 16:18:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:18:49,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2020-08-22 16:18:49,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:49,171 INFO L225 Difference]: With dead ends: 214 [2020-08-22 16:18:49,171 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:18:49,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:18:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:18:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:18:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:18:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:18:49,174 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 118 [2020-08-22 16:18:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:49,174 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:18:49,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:18:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:18:49,174 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:18:49,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-08-22 16:18:49,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:18:50,147 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 57 [2020-08-22 16:18:52,096 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 469 DAG size of output: 321 [2020-08-22 16:18:53,095 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 71 [2020-08-22 16:18:53,268 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 50 [2020-08-22 16:18:54,837 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 409 DAG size of output: 85 [2020-08-22 16:18:55,007 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 50 [2020-08-22 16:18:55,158 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 43 [2020-08-22 16:18:55,289 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 43 [2020-08-22 16:18:56,296 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 368 DAG size of output: 78 [2020-08-22 16:18:56,538 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 57 [2020-08-22 16:18:57,167 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 71 [2020-08-22 16:18:57,647 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 64 [2020-08-22 16:18:58,041 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 64 [2020-08-22 16:18:58,344 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 57 [2020-08-22 16:19:00,028 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 421 DAG size of output: 327 [2020-08-22 16:19:00,160 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 130 [2020-08-22 16:19:02,127 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 421 DAG size of output: 327 [2020-08-22 16:19:02,249 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 130 [2020-08-22 16:19:02,385 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 134 [2020-08-22 16:19:02,700 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 138 [2020-08-22 16:19:03,877 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 354 DAG size of output: 298 [2020-08-22 16:19:04,850 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 242 [2020-08-22 16:19:05,588 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 224 [2020-08-22 16:19:06,952 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 378 DAG size of output: 304 [2020-08-22 16:19:08,192 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 354 DAG size of output: 298 [2020-08-22 16:19:09,579 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 378 DAG size of output: 304 [2020-08-22 16:19:10,880 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 354 DAG size of output: 298 [2020-08-22 16:19:12,112 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 336 DAG size of output: 287 [2020-08-22 16:19:13,822 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 402 DAG size of output: 238 [2020-08-22 16:19:15,184 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 336 DAG size of output: 287 [2020-08-22 16:19:16,926 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 775 DAG size of output: 339 [2020-08-22 16:19:18,205 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 336 DAG size of output: 287 [2020-08-22 16:19:18,378 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 137 [2020-08-22 16:19:18,818 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 214 [2020-08-22 16:19:19,029 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 130 [2020-08-22 16:19:19,417 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 214 [2020-08-22 16:19:20,232 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 272 [2020-08-22 16:19:20,613 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 214 [2020-08-22 16:19:20,736 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 130 [2020-08-22 16:19:21,529 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 272 [2020-08-22 16:19:21,687 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 29 [2020-08-22 16:19:22,644 WARN L193 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 289 [2020-08-22 16:19:23,520 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 272 [2020-08-22 16:19:23,642 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 29 [2020-08-22 16:19:24,599 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 289 [2020-08-22 16:19:26,089 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 379 DAG size of output: 319 [2020-08-22 16:19:26,952 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 273 [2020-08-22 16:19:27,843 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 273 [2020-08-22 16:19:29,335 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 379 DAG size of output: 319 [2020-08-22 16:19:29,832 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 241 [2020-08-22 16:19:30,294 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 206 [2020-08-22 16:19:31,846 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 379 DAG size of output: 319 [2020-08-22 16:19:32,301 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 174 [2020-08-22 16:19:36,886 WARN L193 SmtUtils]: Spent 4.58 s on a formula simplification. DAG size of input: 563 DAG size of output: 314 [2020-08-22 16:19:38,352 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 398 DAG size of output: 307 [2020-08-22 16:19:38,686 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 174 [2020-08-22 16:19:39,372 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 258 [2020-08-22 16:19:40,022 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 241 [2020-08-22 16:19:40,662 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 258 [2020-08-22 16:19:40,981 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 189 [2020-08-22 16:19:41,557 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 189 [2020-08-22 16:19:42,378 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 241 [2020-08-22 16:19:42,844 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 189 [2020-08-22 16:19:44,253 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 398 DAG size of output: 307 [2020-08-22 16:19:50,946 WARN L193 SmtUtils]: Spent 6.69 s on a formula simplification. DAG size of input: 700 DAG size of output: 397 [2020-08-22 16:19:52,399 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 398 DAG size of output: 307 [2020-08-22 16:19:52,763 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 174 [2020-08-22 16:19:52,986 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 156 [2020-08-22 16:19:53,294 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 158 [2020-08-22 16:20:00,117 WARN L193 SmtUtils]: Spent 6.81 s on a formula simplification. DAG size of input: 631 DAG size of output: 354 [2020-08-22 16:20:01,076 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 204 [2020-08-22 16:20:05,772 WARN L193 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 521 DAG size of output: 314 [2020-08-22 16:20:06,115 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 174 [2020-08-22 16:20:07,226 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 330 DAG size of output: 287 [2020-08-22 16:20:07,826 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 231 [2020-08-22 16:20:07,973 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 136 [2020-08-22 16:20:08,502 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 231 [2020-08-22 16:20:09,547 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 330 DAG size of output: 287 [2020-08-22 16:20:10,502 WARN L193 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 287 [2020-08-22 16:20:10,764 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 120 [2020-08-22 16:20:13,588 WARN L193 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 500 DAG size of output: 296 [2020-08-22 16:20:13,898 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 147 [2020-08-22 16:20:14,253 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 207 [2020-08-22 16:20:15,555 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 325 DAG size of output: 271 [2020-08-22 16:20:17,878 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 462 DAG size of output: 278 [2020-08-22 16:20:19,656 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 440 DAG size of output: 258 [2020-08-22 16:20:19,837 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 29 [2020-08-22 16:20:20,484 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 256 [2020-08-22 16:20:20,651 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 36 [2020-08-22 16:20:21,436 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 256 [2020-08-22 16:20:21,590 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 29 [2020-08-22 16:20:21,714 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 36 [2020-08-22 16:20:22,363 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 256 [2020-08-22 16:20:23,731 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 309 DAG size of output: 254 [2020-08-22 16:20:25,440 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 421 DAG size of output: 327 [2020-08-22 16:20:28,040 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 305 DAG size of output: 12 [2020-08-22 16:20:29,330 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 325 DAG size of output: 14 [2020-08-22 16:20:29,756 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2020-08-22 16:20:30,047 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 9 [2020-08-22 16:20:30,072 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 16:20:30,072 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:20:30,073 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-08-22 16:20:30,073 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-08-22 16:20:30,073 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (or (= base2flt_~__retres4~0 0) (<= |base2flt_#in~e| (+ base2flt_~e 9)) (not (= (mod |base2flt_#in~m| 4294967296) 0))) [2020-08-22 16:20:30,073 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-08-22 16:20:30,073 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-08-22 16:20:30,073 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-08-22 16:20:30,074 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (not (= (mod |base2flt_#in~m| 4294967296) 0)) [2020-08-22 16:20:30,074 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-08-22 16:20:30,074 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-08-22 16:20:30,074 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-08-22 16:20:30,074 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (or (<= |base2flt_#in~e| (+ base2flt_~e 9)) (not (= (mod |base2flt_#in~m| 4294967296) 0))) [2020-08-22 16:20:30,074 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-08-22 16:20:30,074 INFO L264 CegarLoopResult]: At program point L47-2(lines 47 62) the Hoare annotation is: (and (<= |base2flt_#in~e| base2flt_~e) (<= 16777216 (mod |base2flt_#in~m| 4294967296))) [2020-08-22 16:20:30,074 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-08-22 16:20:30,074 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-08-22 16:20:30,074 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-08-22 16:20:30,074 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-08-22 16:20:30,074 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-08-22 16:20:30,075 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-08-22 16:20:30,075 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-08-22 16:20:30,075 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-08-22 16:20:30,075 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-08-22 16:20:30,075 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-08-22 16:20:30,075 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse4 (= mulflt_~a |mulflt_#in~a|)) (.cse2 (<= 1 (mod |mulflt_#in~b| 4294967296))) (.cse5 (mod |mulflt_#in~a| 4294967296))) (let ((.cse0 (= 0 mulflt_~__retres10~1)) (.cse1 (= mulflt_~b |mulflt_#in~b|)) (.cse3 (or (and .cse2 (<= (mod mulflt_~b 4294967296) .cse5) (<= 0 (div (+ .cse5 (- 1)) 4294967296)) .cse4) (and (= mulflt_~b |mulflt_#in~a|) .cse2 (not (= .cse5 0)))))) (or (and .cse0 .cse1) (and .cse2 .cse0) (and .cse3 .cse4 .cse1) (and (<= .cse5 4294967294) .cse3)))) [2020-08-22 16:20:30,075 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-08-22 16:20:30,075 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:20:30,075 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:20:30,075 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:20:30,075 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:20:30,076 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-08-22 16:20:30,076 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-08-22 16:20:30,076 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-08-22 16:20:30,076 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-08-22 16:20:30,076 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-08-22 16:20:30,076 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-08-22 16:20:30,076 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-08-22 16:20:30,076 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-08-22 16:20:30,076 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-08-22 16:20:30,077 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= main_~zero~0 0) [2020-08-22 16:20:30,077 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-08-22 16:20:30,077 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-08-22 16:20:30,077 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-08-22 16:20:30,077 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-08-22 16:20:30,077 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-08-22 16:20:30,077 INFO L264 CegarLoopResult]: At program point L247-2(lines 247 256) the Hoare annotation is: (and (= main_~tmp___1~0 0) (= main_~tmp___0~0 0)) [2020-08-22 16:20:30,077 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-08-22 16:20:30,078 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (= main_~zero~0 0) [2020-08-22 16:20:30,078 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (let ((.cse0 (= main_~zero~0 0))) (or (and (<= (mod main_~zero~0 4294967296) 0) (= main_~b~0 0)) (and .cse0 (= main_~a~0 0)) (<= (+ main_~sb~0 1) 0) (and (<= (mod main_~b~0 4294967296) 0) .cse0) (and (<= 1 main_~sb~0) (<= 1 main_~tmp~2)))) [2020-08-22 16:20:30,078 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-08-22 16:20:30,078 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= main_~zero~0 0) [2020-08-22 16:20:30,078 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-08-22 16:20:30,078 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-08-22 16:20:30,078 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-08-22 16:20:30,078 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-08-22 16:20:30,078 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-08-22 16:20:30,078 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-08-22 16:20:30,079 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-08-22 16:20:30,079 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-22 16:20:30,079 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-08-22 16:20:30,079 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-08-22 16:20:30,079 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-08-22 16:20:30,079 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-08-22 16:20:30,079 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-08-22 16:20:30,079 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-08-22 16:20:30,080 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-08-22 16:20:30,080 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-08-22 16:20:30,080 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-08-22 16:20:30,080 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-08-22 16:20:30,080 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-08-22 16:20:30,080 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-08-22 16:20:30,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:20:30 BoogieIcfgContainer [2020-08-22 16:20:30,105 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:20:30,107 INFO L168 Benchmark]: Toolchain (without parser) took 145000.81 ms. Allocated memory was 138.9 MB in the beginning and 1.7 GB in the end (delta: 1.6 GB). Free memory was 101.7 MB in the beginning and 697.0 MB in the end (delta: -595.4 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2020-08-22 16:20:30,107 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-22 16:20:30,108 INFO L168 Benchmark]: CACSL2BoogieTranslator took 438.16 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 101.3 MB in the beginning and 179.7 MB in the end (delta: -78.5 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:20:30,108 INFO L168 Benchmark]: Boogie Preprocessor took 46.30 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 177.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:20:30,109 INFO L168 Benchmark]: RCFGBuilder took 610.83 ms. Allocated memory is still 201.3 MB. Free memory was 177.3 MB in the beginning and 152.1 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:20:30,109 INFO L168 Benchmark]: TraceAbstraction took 143898.06 ms. Allocated memory was 201.3 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 151.1 MB in the beginning and 697.0 MB in the end (delta: -545.9 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2020-08-22 16:20:30,111 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 438.16 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 101.3 MB in the beginning and 179.7 MB in the end (delta: -78.5 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.30 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 177.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 610.83 ms. Allocated memory is still 201.3 MB. Free memory was 177.3 MB in the beginning and 152.1 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 143898.06 ms. Allocated memory was 201.3 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 151.1 MB in the beginning and 697.0 MB in the end (delta: -545.9 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: \old(e) <= e + 9 || !(\old(m) % 4294967296 == 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (__retres4 == 0 || \old(e) <= e + 9) || !(\old(m) % 4294967296 == 0) - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: (((0 == __retres10 && b == \old(b)) || (1 <= \old(b) % 4294967296 && 0 == __retres10)) || ((((((1 <= \old(b) % 4294967296 && b % 4294967296 <= \old(a) % 4294967296) && 0 <= (\old(a) % 4294967296 + -1) / 4294967296) && a == \old(a)) || ((b == \old(a) && 1 <= \old(b) % 4294967296) && !(\old(a) % 4294967296 == 0))) && a == \old(a)) && b == \old(b))) || (\old(a) % 4294967296 <= 4294967294 && ((((1 <= \old(b) % 4294967296 && b % 4294967296 <= \old(a) % 4294967296) && 0 <= (\old(a) % 4294967296 + -1) / 4294967296) && a == \old(a)) || ((b == \old(a) && 1 <= \old(b) % 4294967296) && !(\old(a) % 4294967296 == 0)))) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: \old(e) <= e && 16777216 <= \old(m) % 4294967296 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 43.1s, OverallIterations: 36, TraceHistogramMax: 20, AutomataDifference: 18.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 100.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2625 SDtfs, 5301 SDslu, 22746 SDs, 0 SdLazy, 12416 SolverSat, 1535 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3931 GetRequests, 3117 SyntacticMatches, 3 SemanticMatches, 811 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4712 ImplicationChecksByTransitivity, 13.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=207occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 36 MinimizatonAttempts, 1373 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 1165 PreInvPairs, 18848 NumberOfFragments, 216 HoareAnnotationTreeSize, 1165 FomulaSimplifications, -6168523150588699229 FormulaSimplificationTreeSizeReduction, 96.9s HoareSimplificationTime, 18 FomulaSimplificationsInter, 14959612298 FormulaSimplificationTreeSizeReductionInter, 3.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 11.6s InterpolantComputationTime, 5634 NumberOfCodeBlocks, 5432 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 5562 ConstructedInterpolants, 0 QuantifiedInterpolants, 1354947 SizeOfPredicates, 57 NumberOfNonLiveVariables, 6899 ConjunctsInSsa, 452 ConjunctsInUnsatCore, 72 InterpolantComputations, 10 PerfectInterpolantSequences, 5492/10570 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...