/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:34:53,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:34:53,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:34:53,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:34:53,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:34:53,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:34:53,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:34:53,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:34:53,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:34:53,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:34:53,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:34:53,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:34:53,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:34:53,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:34:53,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:34:53,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:34:53,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:34:53,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:34:53,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:34:53,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:34:53,656 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:34:53,681 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:34:53,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:34:53,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:34:53,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:34:53,684 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:34:53,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:34:53,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:34:53,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:34:53,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:34:53,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:34:53,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:34:53,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:34:53,685 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:34:53,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:34:53,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:34:53,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:34:53,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:34:53,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:34:53,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:34:53,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:34:53,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:34:53,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:34:53,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:34:53,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:34:53,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:34:53,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:34:54,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:34:54,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:34:54,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:34:54,085 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:34:54,086 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:34:54,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:34:54,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed35fc241/feb26968891b4364a06a030b1167c3f9/FLAGac1d4b64e [2020-12-22 07:34:54,770 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:34:54,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:34:54,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed35fc241/feb26968891b4364a06a030b1167c3f9/FLAGac1d4b64e [2020-12-22 07:34:55,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed35fc241/feb26968891b4364a06a030b1167c3f9 [2020-12-22 07:34:55,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:34:55,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:34:55,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:34:55,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:34:55,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:34:55,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:34:55" (1/1) ... [2020-12-22 07:34:55,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3733351b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:55, skipping insertion in model container [2020-12-22 07:34:55,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:34:55" (1/1) ... [2020-12-22 07:34:55,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:34:55,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:34:55,607 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c[11335,11348] [2020-12-22 07:34:55,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:34:55,641 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:34:55,752 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c[11335,11348] [2020-12-22 07:34:55,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:34:55,787 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:34:55,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:55 WrapperNode [2020-12-22 07:34:55,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:34:55,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:34:55,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:34:55,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:34:55,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:55" (1/1) ... [2020-12-22 07:34:55,829 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:55" (1/1) ... [2020-12-22 07:34:55,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:34:55,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:34:55,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:34:55,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:34:55,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:55" (1/1) ... [2020-12-22 07:34:55,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:55" (1/1) ... [2020-12-22 07:34:55,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:55" (1/1) ... [2020-12-22 07:34:55,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:55" (1/1) ... [2020-12-22 07:34:55,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:55" (1/1) ... [2020-12-22 07:34:55,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:55" (1/1) ... [2020-12-22 07:34:55,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:55" (1/1) ... [2020-12-22 07:34:55,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:34:55,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:34:55,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:34:55,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:34:55,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:55" (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 [2020-12-22 07:34:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:34:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:34:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:34:56,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:34:57,052 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:34:57,053 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:34:57,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:34:57 BoogieIcfgContainer [2020-12-22 07:34:57,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:34:57,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:34:57,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:34:57,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:34:57,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:34:55" (1/3) ... [2020-12-22 07:34:57,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3fd260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:34:57, skipping insertion in model container [2020-12-22 07:34:57,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:55" (2/3) ... [2020-12-22 07:34:57,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3fd260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:34:57, skipping insertion in model container [2020-12-22 07:34:57,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:34:57" (3/3) ... [2020-12-22 07:34:57,072 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:34:57,083 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:34:57,089 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:34:57,109 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:34:57,155 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:34:57,155 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:34:57,156 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:34:57,157 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:34:57,157 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:34:57,157 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:34:57,157 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:34:57,157 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:34:57,180 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2020-12-22 07:34:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 07:34:57,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:57,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:57,193 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:57,200 INFO L82 PathProgramCache]: Analyzing trace with hash 8392247, now seen corresponding path program 1 times [2020-12-22 07:34:57,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:57,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549697979] [2020-12-22 07:34:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:57,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549697979] [2020-12-22 07:34:57,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:57,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:34:57,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948599888] [2020-12-22 07:34:57,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:34:57,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:57,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:34:57,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:34:57,551 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 2 states. [2020-12-22 07:34:57,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:57,579 INFO L93 Difference]: Finished difference Result 144 states and 241 transitions. [2020-12-22 07:34:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:34:57,581 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 33 [2020-12-22 07:34:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:57,592 INFO L225 Difference]: With dead ends: 144 [2020-12-22 07:34:57,592 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 07:34:57,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:34:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 07:34:57,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-22 07:34:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 07:34:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 149 transitions. [2020-12-22 07:34:57,655 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 149 transitions. Word has length 33 [2020-12-22 07:34:57,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:57,655 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 149 transitions. [2020-12-22 07:34:57,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:34:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 149 transitions. [2020-12-22 07:34:57,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 07:34:57,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:57,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:57,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:34:57,659 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:57,660 INFO L82 PathProgramCache]: Analyzing trace with hash -501080843, now seen corresponding path program 1 times [2020-12-22 07:34:57,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:57,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137571561] [2020-12-22 07:34:57,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:57,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137571561] [2020-12-22 07:34:57,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:57,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:34:57,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192187353] [2020-12-22 07:34:57,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:34:57,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:57,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:34:57,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:34:57,784 INFO L87 Difference]: Start difference. First operand 88 states and 149 transitions. Second operand 5 states. [2020-12-22 07:34:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:57,947 INFO L93 Difference]: Finished difference Result 143 states and 234 transitions. [2020-12-22 07:34:57,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:34:57,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-12-22 07:34:57,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:57,950 INFO L225 Difference]: With dead ends: 143 [2020-12-22 07:34:57,950 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 07:34:57,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:34:57,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 07:34:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-22 07:34:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 07:34:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 118 transitions. [2020-12-22 07:34:57,961 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 118 transitions. Word has length 33 [2020-12-22 07:34:57,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:57,962 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 118 transitions. [2020-12-22 07:34:57,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:34:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 118 transitions. [2020-12-22 07:34:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:34:57,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:57,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:57,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:34:57,965 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:57,966 INFO L82 PathProgramCache]: Analyzing trace with hash 988628396, now seen corresponding path program 1 times [2020-12-22 07:34:57,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:57,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607290925] [2020-12-22 07:34:57,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:58,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607290925] [2020-12-22 07:34:58,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:58,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:58,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167328648] [2020-12-22 07:34:58,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:58,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:58,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:58,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:58,158 INFO L87 Difference]: Start difference. First operand 88 states and 118 transitions. Second operand 3 states. [2020-12-22 07:34:58,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:58,198 INFO L93 Difference]: Finished difference Result 184 states and 270 transitions. [2020-12-22 07:34:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:58,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:34:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:58,201 INFO L225 Difference]: With dead ends: 184 [2020-12-22 07:34:58,202 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 07:34:58,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 07:34:58,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2020-12-22 07:34:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-22 07:34:58,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-12-22 07:34:58,218 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 63 [2020-12-22 07:34:58,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:58,218 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-12-22 07:34:58,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:58,219 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-12-22 07:34:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:34:58,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:58,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:58,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:34:58,222 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:58,222 INFO L82 PathProgramCache]: Analyzing trace with hash 243045666, now seen corresponding path program 1 times [2020-12-22 07:34:58,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:58,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540569087] [2020-12-22 07:34:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:58,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540569087] [2020-12-22 07:34:58,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:58,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:58,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358411099] [2020-12-22 07:34:58,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:58,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:58,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:58,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:58,382 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 3 states. [2020-12-22 07:34:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:58,422 INFO L93 Difference]: Finished difference Result 307 states and 467 transitions. [2020-12-22 07:34:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:58,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:34:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:58,426 INFO L225 Difference]: With dead ends: 307 [2020-12-22 07:34:58,426 INFO L226 Difference]: Without dead ends: 213 [2020-12-22 07:34:58,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:58,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-22 07:34:58,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2020-12-22 07:34:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-12-22 07:34:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 314 transitions. [2020-12-22 07:34:58,449 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 314 transitions. Word has length 63 [2020-12-22 07:34:58,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:58,450 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 314 transitions. [2020-12-22 07:34:58,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 314 transitions. [2020-12-22 07:34:58,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:34:58,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:58,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:58,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:34:58,453 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:58,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:58,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1696985192, now seen corresponding path program 1 times [2020-12-22 07:34:58,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:58,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239235957] [2020-12-22 07:34:58,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:58,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239235957] [2020-12-22 07:34:58,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:58,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:58,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612347701] [2020-12-22 07:34:58,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:58,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:58,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:58,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:58,534 INFO L87 Difference]: Start difference. First operand 211 states and 314 transitions. Second operand 3 states. [2020-12-22 07:34:58,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:58,573 INFO L93 Difference]: Finished difference Result 535 states and 828 transitions. [2020-12-22 07:34:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:58,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:34:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:58,578 INFO L225 Difference]: With dead ends: 535 [2020-12-22 07:34:58,578 INFO L226 Difference]: Without dead ends: 361 [2020-12-22 07:34:58,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-12-22 07:34:58,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 359. [2020-12-22 07:34:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-12-22 07:34:58,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 546 transitions. [2020-12-22 07:34:58,609 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 546 transitions. Word has length 63 [2020-12-22 07:34:58,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:58,610 INFO L481 AbstractCegarLoop]: Abstraction has 359 states and 546 transitions. [2020-12-22 07:34:58,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:58,610 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 546 transitions. [2020-12-22 07:34:58,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:34:58,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:58,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:58,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:34:58,612 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:58,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:58,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1003697422, now seen corresponding path program 1 times [2020-12-22 07:34:58,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:58,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212216395] [2020-12-22 07:34:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:58,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212216395] [2020-12-22 07:34:58,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:58,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:58,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871409638] [2020-12-22 07:34:58,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:58,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:58,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:58,721 INFO L87 Difference]: Start difference. First operand 359 states and 546 transitions. Second operand 3 states. [2020-12-22 07:34:58,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:58,770 INFO L93 Difference]: Finished difference Result 955 states and 1484 transitions. [2020-12-22 07:34:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:58,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:34:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:58,775 INFO L225 Difference]: With dead ends: 955 [2020-12-22 07:34:58,775 INFO L226 Difference]: Without dead ends: 633 [2020-12-22 07:34:58,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-12-22 07:34:58,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 631. [2020-12-22 07:34:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-12-22 07:34:58,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 966 transitions. [2020-12-22 07:34:58,814 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 966 transitions. Word has length 63 [2020-12-22 07:34:58,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:58,814 INFO L481 AbstractCegarLoop]: Abstraction has 631 states and 966 transitions. [2020-12-22 07:34:58,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:58,814 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 966 transitions. [2020-12-22 07:34:58,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:34:58,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:58,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:58,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:34:58,816 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:58,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:58,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1341490564, now seen corresponding path program 1 times [2020-12-22 07:34:58,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:58,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075761279] [2020-12-22 07:34:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:58,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075761279] [2020-12-22 07:34:58,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:58,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:58,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587895388] [2020-12-22 07:34:58,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:58,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:58,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:58,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:58,913 INFO L87 Difference]: Start difference. First operand 631 states and 966 transitions. Second operand 3 states. [2020-12-22 07:34:58,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:58,997 INFO L93 Difference]: Finished difference Result 1723 states and 2664 transitions. [2020-12-22 07:34:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:58,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:34:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:59,009 INFO L225 Difference]: With dead ends: 1723 [2020-12-22 07:34:59,009 INFO L226 Difference]: Without dead ends: 1129 [2020-12-22 07:34:59,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2020-12-22 07:34:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1127. [2020-12-22 07:34:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1127 states. [2020-12-22 07:34:59,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1718 transitions. [2020-12-22 07:34:59,067 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1718 transitions. Word has length 63 [2020-12-22 07:34:59,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:59,068 INFO L481 AbstractCegarLoop]: Abstraction has 1127 states and 1718 transitions. [2020-12-22 07:34:59,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1718 transitions. [2020-12-22 07:34:59,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:34:59,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:59,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:59,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:34:59,074 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:59,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:59,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1735491334, now seen corresponding path program 1 times [2020-12-22 07:34:59,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:59,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252455360] [2020-12-22 07:34:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:59,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252455360] [2020-12-22 07:34:59,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:59,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:34:59,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344498202] [2020-12-22 07:34:59,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:34:59,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:59,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:34:59,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:34:59,241 INFO L87 Difference]: Start difference. First operand 1127 states and 1718 transitions. Second operand 7 states. [2020-12-22 07:35:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:00,012 INFO L93 Difference]: Finished difference Result 12027 states and 18528 transitions. [2020-12-22 07:35:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 07:35:00,013 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-12-22 07:35:00,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:00,069 INFO L225 Difference]: With dead ends: 12027 [2020-12-22 07:35:00,069 INFO L226 Difference]: Without dead ends: 10937 [2020-12-22 07:35:00,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:35:00,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10937 states. [2020-12-22 07:35:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10937 to 2215. [2020-12-22 07:35:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2215 states. [2020-12-22 07:35:00,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 3334 transitions. [2020-12-22 07:35:00,328 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 3334 transitions. Word has length 63 [2020-12-22 07:35:00,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:00,329 INFO L481 AbstractCegarLoop]: Abstraction has 2215 states and 3334 transitions. [2020-12-22 07:35:00,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:35:00,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 3334 transitions. [2020-12-22 07:35:00,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:35:00,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:00,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:00,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:35:00,330 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:00,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:00,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1519410410, now seen corresponding path program 1 times [2020-12-22 07:35:00,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:00,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789849779] [2020-12-22 07:35:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:00,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789849779] [2020-12-22 07:35:00,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:00,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:00,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421584423] [2020-12-22 07:35:00,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:00,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:00,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:00,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:00,443 INFO L87 Difference]: Start difference. First operand 2215 states and 3334 transitions. Second operand 3 states. [2020-12-22 07:35:00,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:00,676 INFO L93 Difference]: Finished difference Result 5405 states and 8154 transitions. [2020-12-22 07:35:00,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:00,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:35:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:00,693 INFO L225 Difference]: With dead ends: 5405 [2020-12-22 07:35:00,694 INFO L226 Difference]: Without dead ends: 3227 [2020-12-22 07:35:00,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:00,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2020-12-22 07:35:00,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 3225. [2020-12-22 07:35:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3225 states. [2020-12-22 07:35:00,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 4808 transitions. [2020-12-22 07:35:00,911 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 4808 transitions. Word has length 65 [2020-12-22 07:35:00,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:00,911 INFO L481 AbstractCegarLoop]: Abstraction has 3225 states and 4808 transitions. [2020-12-22 07:35:00,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 4808 transitions. [2020-12-22 07:35:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:35:00,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:00,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:00,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:35:00,913 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1585903922, now seen corresponding path program 1 times [2020-12-22 07:35:00,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:00,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389773310] [2020-12-22 07:35:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:01,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389773310] [2020-12-22 07:35:01,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:01,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:35:01,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155705145] [2020-12-22 07:35:01,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:35:01,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:01,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:35:01,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:35:01,151 INFO L87 Difference]: Start difference. First operand 3225 states and 4808 transitions. Second operand 7 states. [2020-12-22 07:35:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:01,534 INFO L93 Difference]: Finished difference Result 6413 states and 9578 transitions. [2020-12-22 07:35:01,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:35:01,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-12-22 07:35:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:01,553 INFO L225 Difference]: With dead ends: 6413 [2020-12-22 07:35:01,554 INFO L226 Difference]: Without dead ends: 3227 [2020-12-22 07:35:01,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:35:01,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2020-12-22 07:35:01,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 3225. [2020-12-22 07:35:01,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3225 states. [2020-12-22 07:35:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 4760 transitions. [2020-12-22 07:35:01,808 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 4760 transitions. Word has length 65 [2020-12-22 07:35:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:01,809 INFO L481 AbstractCegarLoop]: Abstraction has 3225 states and 4760 transitions. [2020-12-22 07:35:01,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:35:01,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 4760 transitions. [2020-12-22 07:35:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:35:01,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:01,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:01,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:35:01,810 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:01,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1503658279, now seen corresponding path program 1 times [2020-12-22 07:35:01,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:01,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51811659] [2020-12-22 07:35:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:01,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51811659] [2020-12-22 07:35:01,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:01,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:01,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306805888] [2020-12-22 07:35:01,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:01,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:01,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:01,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:01,938 INFO L87 Difference]: Start difference. First operand 3225 states and 4760 transitions. Second operand 8 states. [2020-12-22 07:35:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:02,434 INFO L93 Difference]: Finished difference Result 6004 states and 8746 transitions. [2020-12-22 07:35:02,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:35:02,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-12-22 07:35:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:02,482 INFO L225 Difference]: With dead ends: 6004 [2020-12-22 07:35:02,482 INFO L226 Difference]: Without dead ends: 6002 [2020-12-22 07:35:02,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:35:02,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2020-12-22 07:35:02,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 3417. [2020-12-22 07:35:02,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3417 states. [2020-12-22 07:35:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 4936 transitions. [2020-12-22 07:35:02,823 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 4936 transitions. Word has length 66 [2020-12-22 07:35:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:02,823 INFO L481 AbstractCegarLoop]: Abstraction has 3417 states and 4936 transitions. [2020-12-22 07:35:02,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:35:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 4936 transitions. [2020-12-22 07:35:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 07:35:02,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:02,827 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:02,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:35:02,828 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:02,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:02,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1040615738, now seen corresponding path program 1 times [2020-12-22 07:35:02,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:02,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485288449] [2020-12-22 07:35:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:35:03,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485288449] [2020-12-22 07:35:03,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:03,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:35:03,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841862751] [2020-12-22 07:35:03,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:35:03,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:03,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:35:03,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:35:03,007 INFO L87 Difference]: Start difference. First operand 3417 states and 4936 transitions. Second operand 7 states. [2020-12-22 07:35:04,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:04,198 INFO L93 Difference]: Finished difference Result 20997 states and 30366 transitions. [2020-12-22 07:35:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:35:04,198 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 07:35:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:04,234 INFO L225 Difference]: With dead ends: 20997 [2020-12-22 07:35:04,235 INFO L226 Difference]: Without dead ends: 17619 [2020-12-22 07:35:04,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:35:04,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17619 states. [2020-12-22 07:35:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17619 to 6793. [2020-12-22 07:35:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6793 states. [2020-12-22 07:35:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6793 states to 6793 states and 9784 transitions. [2020-12-22 07:35:04,914 INFO L78 Accepts]: Start accepts. Automaton has 6793 states and 9784 transitions. Word has length 93 [2020-12-22 07:35:04,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:04,915 INFO L481 AbstractCegarLoop]: Abstraction has 6793 states and 9784 transitions. [2020-12-22 07:35:04,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:35:04,915 INFO L276 IsEmpty]: Start isEmpty. Operand 6793 states and 9784 transitions. [2020-12-22 07:35:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 07:35:04,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:04,920 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:04,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:35:04,920 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:04,921 INFO L82 PathProgramCache]: Analyzing trace with hash -728167078, now seen corresponding path program 1 times [2020-12-22 07:35:04,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:04,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585990789] [2020-12-22 07:35:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:35:05,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585990789] [2020-12-22 07:35:05,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:05,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:35:05,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475412009] [2020-12-22 07:35:05,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:35:05,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:05,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:35:05,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:35:05,052 INFO L87 Difference]: Start difference. First operand 6793 states and 9784 transitions. Second operand 7 states. [2020-12-22 07:35:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:06,297 INFO L93 Difference]: Finished difference Result 24373 states and 35214 transitions. [2020-12-22 07:35:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:35:06,298 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 07:35:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:06,343 INFO L225 Difference]: With dead ends: 24373 [2020-12-22 07:35:06,344 INFO L226 Difference]: Without dead ends: 20995 [2020-12-22 07:35:06,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:35:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20995 states. [2020-12-22 07:35:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20995 to 11865. [2020-12-22 07:35:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11865 states. [2020-12-22 07:35:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11865 states to 11865 states and 17016 transitions. [2020-12-22 07:35:07,375 INFO L78 Accepts]: Start accepts. Automaton has 11865 states and 17016 transitions. Word has length 93 [2020-12-22 07:35:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:07,376 INFO L481 AbstractCegarLoop]: Abstraction has 11865 states and 17016 transitions. [2020-12-22 07:35:07,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:35:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 11865 states and 17016 transitions. [2020-12-22 07:35:07,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 07:35:07,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:07,382 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:07,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:35:07,382 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:07,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:07,383 INFO L82 PathProgramCache]: Analyzing trace with hash 403472762, now seen corresponding path program 1 times [2020-12-22 07:35:07,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:07,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326613558] [2020-12-22 07:35:07,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:35:07,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326613558] [2020-12-22 07:35:07,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:07,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:35:07,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009097790] [2020-12-22 07:35:07,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:35:07,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:07,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:35:07,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:35:07,517 INFO L87 Difference]: Start difference. First operand 11865 states and 17016 transitions. Second operand 7 states. [2020-12-22 07:35:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:09,269 INFO L93 Difference]: Finished difference Result 27749 states and 40062 transitions. [2020-12-22 07:35:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:35:09,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 07:35:09,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:09,308 INFO L225 Difference]: With dead ends: 27749 [2020-12-22 07:35:09,309 INFO L226 Difference]: Without dead ends: 24371 [2020-12-22 07:35:09,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:35:09,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24371 states. [2020-12-22 07:35:10,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24371 to 15241. [2020-12-22 07:35:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15241 states. [2020-12-22 07:35:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15241 states to 15241 states and 21864 transitions. [2020-12-22 07:35:10,379 INFO L78 Accepts]: Start accepts. Automaton has 15241 states and 21864 transitions. Word has length 93 [2020-12-22 07:35:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:10,379 INFO L481 AbstractCegarLoop]: Abstraction has 15241 states and 21864 transitions. [2020-12-22 07:35:10,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:35:10,380 INFO L276 IsEmpty]: Start isEmpty. Operand 15241 states and 21864 transitions. [2020-12-22 07:35:10,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 07:35:10,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:10,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:10,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:35:10,386 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:10,388 INFO L82 PathProgramCache]: Analyzing trace with hash -831986278, now seen corresponding path program 1 times [2020-12-22 07:35:10,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:10,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329174487] [2020-12-22 07:35:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:35:10,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329174487] [2020-12-22 07:35:10,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:10,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:35:10,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103307656] [2020-12-22 07:35:10,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:35:10,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:10,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:35:10,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:35:10,501 INFO L87 Difference]: Start difference. First operand 15241 states and 21864 transitions. Second operand 7 states. [2020-12-22 07:35:12,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:12,196 INFO L93 Difference]: Finished difference Result 31125 states and 44910 transitions. [2020-12-22 07:35:12,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:35:12,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 07:35:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:12,247 INFO L225 Difference]: With dead ends: 31125 [2020-12-22 07:35:12,247 INFO L226 Difference]: Without dead ends: 27747 [2020-12-22 07:35:12,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:35:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27747 states. [2020-12-22 07:35:13,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27747 to 18617. [2020-12-22 07:35:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18617 states. [2020-12-22 07:35:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18617 states to 18617 states and 26712 transitions. [2020-12-22 07:35:13,573 INFO L78 Accepts]: Start accepts. Automaton has 18617 states and 26712 transitions. Word has length 93 [2020-12-22 07:35:13,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:13,574 INFO L481 AbstractCegarLoop]: Abstraction has 18617 states and 26712 transitions. [2020-12-22 07:35:13,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:35:13,574 INFO L276 IsEmpty]: Start isEmpty. Operand 18617 states and 26712 transitions. [2020-12-22 07:35:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 07:35:13,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:13,581 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:13,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:35:13,581 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:13,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2041985466, now seen corresponding path program 1 times [2020-12-22 07:35:13,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:13,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761613437] [2020-12-22 07:35:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:35:13,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761613437] [2020-12-22 07:35:13,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:13,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:35:13,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45517519] [2020-12-22 07:35:13,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:35:13,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:13,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:35:13,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:35:13,685 INFO L87 Difference]: Start difference. First operand 18617 states and 26712 transitions. Second operand 7 states. [2020-12-22 07:35:15,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:15,694 INFO L93 Difference]: Finished difference Result 32485 states and 46878 transitions. [2020-12-22 07:35:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:35:15,694 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 07:35:15,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:15,728 INFO L225 Difference]: With dead ends: 32485 [2020-12-22 07:35:15,728 INFO L226 Difference]: Without dead ends: 30115 [2020-12-22 07:35:15,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:35:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30115 states. [2020-12-22 07:35:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30115 to 20985. [2020-12-22 07:35:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20985 states. [2020-12-22 07:35:17,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20985 states to 20985 states and 30136 transitions. [2020-12-22 07:35:17,104 INFO L78 Accepts]: Start accepts. Automaton has 20985 states and 30136 transitions. Word has length 93 [2020-12-22 07:35:17,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:17,105 INFO L481 AbstractCegarLoop]: Abstraction has 20985 states and 30136 transitions. [2020-12-22 07:35:17,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:35:17,105 INFO L276 IsEmpty]: Start isEmpty. Operand 20985 states and 30136 transitions. [2020-12-22 07:35:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:35:17,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:17,112 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:17,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:35:17,113 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:17,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:17,113 INFO L82 PathProgramCache]: Analyzing trace with hash -558210768, now seen corresponding path program 1 times [2020-12-22 07:35:17,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:17,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312091687] [2020-12-22 07:35:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:17,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312091687] [2020-12-22 07:35:17,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015708693] [2020-12-22 07:35:17,323 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 [2020-12-22 07:35:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:17,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 07:35:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:35:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:35:17,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:35:17,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 07:35:17,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139961666] [2020-12-22 07:35:17,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:35:17,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:17,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:35:17,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:35:17,950 INFO L87 Difference]: Start difference. First operand 20985 states and 30136 transitions. Second operand 12 states. [2020-12-22 07:35:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:31,988 INFO L93 Difference]: Finished difference Result 168053 states and 240642 transitions. [2020-12-22 07:35:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 07:35:31,988 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 94 [2020-12-22 07:35:31,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:32,284 INFO L225 Difference]: With dead ends: 168053 [2020-12-22 07:35:32,284 INFO L226 Difference]: Without dead ends: 147107 [2020-12-22 07:35:32,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=727, Invalid=3055, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 07:35:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147107 states. [2020-12-22 07:35:39,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147107 to 81217. [2020-12-22 07:35:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81217 states. [2020-12-22 07:35:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81217 states to 81217 states and 115356 transitions. [2020-12-22 07:35:39,477 INFO L78 Accepts]: Start accepts. Automaton has 81217 states and 115356 transitions. Word has length 94 [2020-12-22 07:35:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:39,477 INFO L481 AbstractCegarLoop]: Abstraction has 81217 states and 115356 transitions. [2020-12-22 07:35:39,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:35:39,478 INFO L276 IsEmpty]: Start isEmpty. Operand 81217 states and 115356 transitions. [2020-12-22 07:35:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 07:35:39,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:39,494 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:39,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 07:35:39,708 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:39,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:39,710 INFO L82 PathProgramCache]: Analyzing trace with hash -158934606, now seen corresponding path program 1 times [2020-12-22 07:35:39,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:39,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103974358] [2020-12-22 07:35:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:40,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103974358] [2020-12-22 07:35:40,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976268670] [2020-12-22 07:35:40,176 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 [2020-12-22 07:35:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:35:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:35:40,571 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:35:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:41,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:35:41,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:35:41,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936377180] [2020-12-22 07:35:41,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:35:41,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:41,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:35:41,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:35:41,107 INFO L87 Difference]: Start difference. First operand 81217 states and 115356 transitions. Second operand 17 states. [2020-12-22 07:35:44,843 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 07:35:45,152 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 07:35:45,866 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 07:35:46,427 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 07:35:47,089 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 07:35:48,496 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 07:35:59,266 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-22 07:37:22,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:22,584 INFO L93 Difference]: Finished difference Result 1149886 states and 1606445 transitions. [2020-12-22 07:37:22,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2020-12-22 07:37:22,585 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 95 [2020-12-22 07:37:22,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:24,863 INFO L225 Difference]: With dead ends: 1149886 [2020-12-22 07:37:24,863 INFO L226 Difference]: Without dead ends: 1068708 [2020-12-22 07:37:25,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11803 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=3612, Invalid=25118, Unknown=0, NotChecked=0, Total=28730 [2020-12-22 07:37:25,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068708 states. [2020-12-22 07:38:08,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068708 to 411625. [2020-12-22 07:38:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411625 states. [2020-12-22 07:38:09,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411625 states to 411625 states and 578769 transitions. [2020-12-22 07:38:09,413 INFO L78 Accepts]: Start accepts. Automaton has 411625 states and 578769 transitions. Word has length 95 [2020-12-22 07:38:09,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:09,413 INFO L481 AbstractCegarLoop]: Abstraction has 411625 states and 578769 transitions. [2020-12-22 07:38:09,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:38:09,415 INFO L276 IsEmpty]: Start isEmpty. Operand 411625 states and 578769 transitions. [2020-12-22 07:38:09,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 07:38:09,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:09,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:09,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 07:38:09,649 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:09,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1941203514, now seen corresponding path program 1 times [2020-12-22 07:38:09,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:09,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871448843] [2020-12-22 07:38:09,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:09,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871448843] [2020-12-22 07:38:09,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:09,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:09,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646010084] [2020-12-22 07:38:09,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:09,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:09,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:09,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:09,713 INFO L87 Difference]: Start difference. First operand 411625 states and 578769 transitions. Second operand 3 states.