/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:48:09,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:48:09,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:48:09,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:48:09,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:48:09,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:48:09,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:48:09,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:48:09,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:48:09,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:48:09,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:48:09,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:48:09,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:48:09,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:48:09,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:48:09,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:48:09,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:48:09,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:48:09,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:48:09,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:48:09,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:48:09,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:48:09,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:48:09,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:48:09,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:48:09,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:48:09,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:48:09,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:48:09,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 01:48:09,724 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:48:09,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:48:09,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:48:09,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:48:09,726 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:48:09,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:48:09,726 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:48:09,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:48:09,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:48:09,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:48:09,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:48:09,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:48:09,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:48:09,728 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:48:09,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:48:09,728 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:48:09,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:48:09,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:48:09,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:48:09,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:48:09,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:48:09,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:48:09,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:48:09,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:48:09,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:48:09,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:48:09,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:48:09,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:48:09,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:48:09,731 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:48:10,085 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:48:10,106 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:48:10,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:48:10,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:48:10,115 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:48:10,116 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-07-20 01:48:10,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7de71dbef/f1755ac77766493ea3b9cf3c1869329e/FLAGd63448747 [2020-07-20 01:48:10,785 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:48:10,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/lu.cmp.c [2020-07-20 01:48:10,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7de71dbef/f1755ac77766493ea3b9cf3c1869329e/FLAGd63448747 [2020-07-20 01:48:11,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7de71dbef/f1755ac77766493ea3b9cf3c1869329e [2020-07-20 01:48:11,085 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:48:11,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:48:11,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:48:11,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:48:11,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:48:11,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:48:11" (1/1) ... [2020-07-20 01:48:11,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf8b08e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:11, skipping insertion in model container [2020-07-20 01:48:11,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:48:11" (1/1) ... [2020-07-20 01:48:11,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:48:11,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:48:11,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:48:11,425 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:48:11,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:48:11,624 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:48:11,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:11 WrapperNode [2020-07-20 01:48:11,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:48:11,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:48:11,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:48:11,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:48:11,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:11" (1/1) ... [2020-07-20 01:48:11,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:11" (1/1) ... [2020-07-20 01:48:11,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:11" (1/1) ... [2020-07-20 01:48:11,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:11" (1/1) ... [2020-07-20 01:48:11,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:11" (1/1) ... [2020-07-20 01:48:11,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:11" (1/1) ... [2020-07-20 01:48:11,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:11" (1/1) ... [2020-07-20 01:48:11,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:48:11,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:48:11,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:48:11,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:48:11,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:11" (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 [2020-07-20 01:48:11,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:48:11,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:48:11,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:48:11,810 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-07-20 01:48:11,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:48:11,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-07-20 01:48:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:48:11,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:48:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-07-20 01:48:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-07-20 01:48:11,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:48:11,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 01:48:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 01:48:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 01:48:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:48:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:48:11,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:48:12,502 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:48:12,503 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-20 01:48:12,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:48:12 BoogieIcfgContainer [2020-07-20 01:48:12,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:48:12,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:48:12,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:48:12,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:48:12,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:48:11" (1/3) ... [2020-07-20 01:48:12,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d9b35f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:48:12, skipping insertion in model container [2020-07-20 01:48:12,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:11" (2/3) ... [2020-07-20 01:48:12,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d9b35f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:48:12, skipping insertion in model container [2020-07-20 01:48:12,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:48:12" (3/3) ... [2020-07-20 01:48:12,523 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-07-20 01:48:12,538 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:48:12,551 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:48:12,575 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:48:12,614 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:48:12,614 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:48:12,614 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:48:12,614 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:48:12,615 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:48:12,615 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:48:12,615 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:48:12,615 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:48:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-07-20 01:48:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 01:48:12,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:12,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:12,654 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:12,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:12,663 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-07-20 01:48:12,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:12,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147426998] [2020-07-20 01:48:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:12,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147426998] [2020-07-20 01:48:12,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:48:12,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:48:12,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874606098] [2020-07-20 01:48:12,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:48:12,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:12,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:48:13,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:48:13,006 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-07-20 01:48:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:13,353 INFO L93 Difference]: Finished difference Result 127 states and 191 transitions. [2020-07-20 01:48:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:48:13,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-20 01:48:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:13,372 INFO L225 Difference]: With dead ends: 127 [2020-07-20 01:48:13,372 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 01:48:13,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:48:13,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 01:48:13,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-07-20 01:48:13,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 01:48:13,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-20 01:48:13,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-07-20 01:48:13,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:13,453 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-20 01:48:13,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:48:13,454 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-20 01:48:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 01:48:13,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:13,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:13,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:48:13,456 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:13,456 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-07-20 01:48:13,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:13,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775220034] [2020-07-20 01:48:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:13,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775220034] [2020-07-20 01:48:13,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:48:13,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:48:13,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946031585] [2020-07-20 01:48:13,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:48:13,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:13,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:48:13,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:48:13,621 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-07-20 01:48:13,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:13,858 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-20 01:48:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:48:13,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 01:48:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:13,860 INFO L225 Difference]: With dead ends: 40 [2020-07-20 01:48:13,861 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 01:48:13,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:48:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 01:48:13,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-07-20 01:48:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 01:48:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-20 01:48:13,886 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-07-20 01:48:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:13,887 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-20 01:48:13,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:48:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-20 01:48:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 01:48:13,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:13,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:13,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:48:13,893 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:13,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-07-20 01:48:13,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:13,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158833121] [2020-07-20 01:48:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:14,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158833121] [2020-07-20 01:48:14,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:48:14,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:48:14,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894125434] [2020-07-20 01:48:14,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:48:14,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:14,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:48:14,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:48:14,090 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-07-20 01:48:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:14,289 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-20 01:48:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:48:14,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 01:48:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:14,292 INFO L225 Difference]: With dead ends: 48 [2020-07-20 01:48:14,293 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 01:48:14,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:48:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 01:48:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-07-20 01:48:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 01:48:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-07-20 01:48:14,303 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-07-20 01:48:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:14,303 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-07-20 01:48:14,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:48:14,304 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-07-20 01:48:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 01:48:14,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:14,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:14,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 01:48:14,305 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:14,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:14,306 INFO L82 PathProgramCache]: Analyzing trace with hash -370887203, now seen corresponding path program 1 times [2020-07-20 01:48:14,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:14,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754760888] [2020-07-20 01:48:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:48:14,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754760888] [2020-07-20 01:48:14,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:48:14,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 01:48:14,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754358918] [2020-07-20 01:48:14,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:48:14,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:14,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:48:14,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:48:14,482 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-07-20 01:48:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:14,759 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-20 01:48:14,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:48:14,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 01:48:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:14,760 INFO L225 Difference]: With dead ends: 37 [2020-07-20 01:48:14,761 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 01:48:14,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:48:14,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 01:48:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-20 01:48:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 01:48:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 01:48:14,777 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 16 [2020-07-20 01:48:14,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:14,778 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 01:48:14,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:48:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 01:48:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 01:48:14,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:14,780 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:14,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 01:48:14,780 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:14,781 INFO L82 PathProgramCache]: Analyzing trace with hash 442817577, now seen corresponding path program 1 times [2020-07-20 01:48:14,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:14,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559520410] [2020-07-20 01:48:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:48:14,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559520410] [2020-07-20 01:48:14,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705753289] [2020-07-20 01:48:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ad1fcec 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 [2020-07-20 01:48:15,102 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ad1fcec issued 2 check-sat command(s) [2020-07-20 01:48:15,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:15,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 01:48:15,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 01:48:15,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:15,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2020-07-20 01:48:15,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182654436] [2020-07-20 01:48:15,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:48:15,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:15,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:48:15,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:48:15,227 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2020-07-20 01:48:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:15,470 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-07-20 01:48:15,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:48:15,472 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-20 01:48:15,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:15,482 INFO L225 Difference]: With dead ends: 66 [2020-07-20 01:48:15,482 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 01:48:15,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:48:15,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 01:48:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-20 01:48:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 01:48:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-07-20 01:48:15,514 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2020-07-20 01:48:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:15,514 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-07-20 01:48:15,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:48:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-07-20 01:48:15,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 01:48:15,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:15,516 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:15,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:15,732 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:15,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1798981815, now seen corresponding path program 2 times [2020-07-20 01:48:15,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:15,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70164912] [2020-07-20 01:48:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 01:48:15,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70164912] [2020-07-20 01:48:15,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425910001] [2020-07-20 01:48:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5bfe5817 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:15,983 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5bfe5817 issued 2 check-sat command(s) [2020-07-20 01:48:15,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:15,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 01:48:15,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 01:48:16,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:16,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-07-20 01:48:16,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643767123] [2020-07-20 01:48:16,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:48:16,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:16,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:48:16,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:48:16,066 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 10 states. [2020-07-20 01:48:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:16,325 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-07-20 01:48:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:48:16,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-20 01:48:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:16,327 INFO L225 Difference]: With dead ends: 78 [2020-07-20 01:48:16,327 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 01:48:16,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-20 01:48:16,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 01:48:16,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-07-20 01:48:16,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:48:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-07-20 01:48:16,348 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2020-07-20 01:48:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:16,349 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-07-20 01:48:16,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:48:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-07-20 01:48:16,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 01:48:16,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:16,357 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:16,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:16,572 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:16,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:16,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1724935017, now seen corresponding path program 3 times [2020-07-20 01:48:16,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:16,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232018401] [2020-07-20 01:48:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 01:48:16,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232018401] [2020-07-20 01:48:16,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890290860] [2020-07-20 01:48:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@47bd3054 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:16,850 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@47bd3054 issued 2 check-sat command(s) [2020-07-20 01:48:16,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:16,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:48:16,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 01:48:16,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:16,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-07-20 01:48:16,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590977977] [2020-07-20 01:48:16,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 01:48:16,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:16,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 01:48:16,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-07-20 01:48:16,932 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 12 states. [2020-07-20 01:48:17,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:17,159 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-07-20 01:48:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 01:48:17,160 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-07-20 01:48:17,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:17,161 INFO L225 Difference]: With dead ends: 90 [2020-07-20 01:48:17,161 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 01:48:17,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:48:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 01:48:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-07-20 01:48:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 01:48:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-07-20 01:48:17,177 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 45 [2020-07-20 01:48:17,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:17,177 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-07-20 01:48:17,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 01:48:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-07-20 01:48:17,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 01:48:17,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:17,184 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:17,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:17,400 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:17,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:17,401 INFO L82 PathProgramCache]: Analyzing trace with hash 192379017, now seen corresponding path program 4 times [2020-07-20 01:48:17,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:17,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774967359] [2020-07-20 01:48:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-20 01:48:17,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774967359] [2020-07-20 01:48:17,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509500122] [2020-07-20 01:48:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c5e8817 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:17,657 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c5e8817 issued 2 check-sat command(s) [2020-07-20 01:48:17,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:17,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 01:48:17,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-07-20 01:48:17,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:17,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-07-20 01:48:17,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429739133] [2020-07-20 01:48:17,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 01:48:17,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:17,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 01:48:17,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:48:17,776 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 14 states. [2020-07-20 01:48:18,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:18,015 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-07-20 01:48:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 01:48:18,018 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-07-20 01:48:18,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:18,019 INFO L225 Difference]: With dead ends: 102 [2020-07-20 01:48:18,020 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 01:48:18,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:48:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 01:48:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-07-20 01:48:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 01:48:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-07-20 01:48:18,030 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 53 [2020-07-20 01:48:18,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:18,031 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-07-20 01:48:18,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 01:48:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-07-20 01:48:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 01:48:18,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:18,032 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:18,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:18,246 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash -915579223, now seen corresponding path program 5 times [2020-07-20 01:48:18,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:18,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78558822] [2020-07-20 01:48:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 114 proven. 45 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-07-20 01:48:18,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78558822] [2020-07-20 01:48:18,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984951113] [2020-07-20 01:48:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70c09abb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:18,627 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70c09abb issued 2 check-sat command(s) [2020-07-20 01:48:18,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:18,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 01:48:18,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 112 proven. 45 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 01:48:18,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:18,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2020-07-20 01:48:18,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988996217] [2020-07-20 01:48:18,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 01:48:18,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:18,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 01:48:18,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:48:18,752 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 16 states. [2020-07-20 01:48:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:19,023 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2020-07-20 01:48:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 01:48:19,024 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-07-20 01:48:19,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:19,026 INFO L225 Difference]: With dead ends: 114 [2020-07-20 01:48:19,026 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 01:48:19,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2020-07-20 01:48:19,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 01:48:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-07-20 01:48:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 01:48:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-07-20 01:48:19,050 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 61 [2020-07-20 01:48:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:19,051 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-07-20 01:48:19,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 01:48:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-07-20 01:48:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 01:48:19,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:19,053 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:19,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:19,269 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 6 times [2020-07-20 01:48:19,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:19,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025777509] [2020-07-20 01:48:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-20 01:48:19,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025777509] [2020-07-20 01:48:19,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409007100] [2020-07-20 01:48:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@478664a4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:19,670 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@478664a4 issued 3 check-sat command(s) [2020-07-20 01:48:19,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:19,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 01:48:19,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-20 01:48:19,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:19,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-20 01:48:19,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671049666] [2020-07-20 01:48:19,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:48:19,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:19,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:48:19,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:48:19,715 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 8 states. [2020-07-20 01:48:19,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:19,939 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-07-20 01:48:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 01:48:19,940 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-20 01:48:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:19,942 INFO L225 Difference]: With dead ends: 168 [2020-07-20 01:48:19,942 INFO L226 Difference]: Without dead ends: 133 [2020-07-20 01:48:19,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:48:19,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-20 01:48:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-07-20 01:48:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 01:48:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-07-20 01:48:19,954 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 69 [2020-07-20 01:48:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:19,954 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-07-20 01:48:19,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:48:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-07-20 01:48:19,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 01:48:19,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:19,956 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:20,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:20,170 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:20,170 INFO L82 PathProgramCache]: Analyzing trace with hash -618561525, now seen corresponding path program 7 times [2020-07-20 01:48:20,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:20,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386345397] [2020-07-20 01:48:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-20 01:48:20,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386345397] [2020-07-20 01:48:20,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621210775] [2020-07-20 01:48:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e1dc204 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:21,439 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e1dc204 issued 4 check-sat command(s) [2020-07-20 01:48:21,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:21,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 01:48:21,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:21,486 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:48:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-20 01:48:21,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:21,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-07-20 01:48:21,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511272477] [2020-07-20 01:48:21,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:48:21,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:21,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:48:21,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:48:21,516 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 10 states. [2020-07-20 01:48:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:21,780 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2020-07-20 01:48:21,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:48:21,786 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-07-20 01:48:21,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:21,787 INFO L225 Difference]: With dead ends: 109 [2020-07-20 01:48:21,787 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 01:48:21,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:48:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 01:48:21,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-07-20 01:48:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-20 01:48:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-07-20 01:48:21,802 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 69 [2020-07-20 01:48:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:21,803 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-07-20 01:48:21,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:48:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-07-20 01:48:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-20 01:48:21,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:21,805 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:22,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:22,020 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:22,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1650306840, now seen corresponding path program 8 times [2020-07-20 01:48:22,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:22,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404910587] [2020-07-20 01:48:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 4 proven. 479 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-07-20 01:48:22,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404910587] [2020-07-20 01:48:22,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32196050] [2020-07-20 01:48:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6532f8bf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:23,552 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6532f8bf issued 3 check-sat command(s) [2020-07-20 01:48:23,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:23,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 01:48:23,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 231 proven. 297 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-07-20 01:48:23,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:23,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-20 01:48:23,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089255506] [2020-07-20 01:48:23,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 01:48:23,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:23,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 01:48:23,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:48:23,670 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 13 states. [2020-07-20 01:48:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:24,131 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2020-07-20 01:48:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 01:48:24,132 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 102 [2020-07-20 01:48:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:24,134 INFO L225 Difference]: With dead ends: 181 [2020-07-20 01:48:24,134 INFO L226 Difference]: Without dead ends: 146 [2020-07-20 01:48:24,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-07-20 01:48:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-20 01:48:24,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2020-07-20 01:48:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-20 01:48:24,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-07-20 01:48:24,148 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 102 [2020-07-20 01:48:24,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:24,149 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-07-20 01:48:24,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 01:48:24,149 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-07-20 01:48:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 01:48:24,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:24,151 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 21, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:24,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 01:48:24,362 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:24,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:24,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2016742743, now seen corresponding path program 9 times [2020-07-20 01:48:24,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:24,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296664709] [2020-07-20 01:48:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 6 proven. 960 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-07-20 01:48:24,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296664709] [2020-07-20 01:48:24,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808587254] [2020-07-20 01:48:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a348ca8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:32,147 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a348ca8 issued 3 check-sat command(s) [2020-07-20 01:48:32,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:32,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 01:48:32,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 254 proven. 768 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 01:48:32,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:32,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2020-07-20 01:48:32,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591792819] [2020-07-20 01:48:32,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 01:48:32,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:32,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 01:48:32,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:48:32,318 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 16 states. [2020-07-20 01:48:32,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:32,874 INFO L93 Difference]: Finished difference Result 212 states and 249 transitions. [2020-07-20 01:48:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 01:48:32,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 135 [2020-07-20 01:48:32,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:32,878 INFO L225 Difference]: With dead ends: 212 [2020-07-20 01:48:32,879 INFO L226 Difference]: Without dead ends: 177 [2020-07-20 01:48:32,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-07-20 01:48:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-20 01:48:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2020-07-20 01:48:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-20 01:48:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 196 transitions. [2020-07-20 01:48:32,896 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 196 transitions. Word has length 135 [2020-07-20 01:48:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:32,897 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 196 transitions. [2020-07-20 01:48:32,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 01:48:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 196 transitions. [2020-07-20 01:48:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-20 01:48:32,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:32,900 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 26, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:33,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:33,102 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:33,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:33,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1900915656, now seen corresponding path program 10 times [2020-07-20 01:48:33,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:33,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880148437] [2020-07-20 01:48:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:48:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-07-20 01:48:33,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880148437] [2020-07-20 01:48:33,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425099099] [2020-07-20 01:48:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b4308 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:27,156 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48b4308 issued 3 check-sat command(s) [2020-07-20 01:49:27,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:49:27,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 01:49:27,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:49:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 219 proven. 1454 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-07-20 01:49:27,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:49:27,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2020-07-20 01:49:27,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624055352] [2020-07-20 01:49:27,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 01:49:27,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:27,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 01:49:27,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-07-20 01:49:27,469 INFO L87 Difference]: Start difference. First operand 171 states and 196 transitions. Second operand 19 states. [2020-07-20 01:49:28,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:28,106 INFO L93 Difference]: Finished difference Result 243 states and 283 transitions. [2020-07-20 01:49:28,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 01:49:28,107 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 168 [2020-07-20 01:49:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:28,110 INFO L225 Difference]: With dead ends: 243 [2020-07-20 01:49:28,110 INFO L226 Difference]: Without dead ends: 208 [2020-07-20 01:49:28,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-07-20 01:49:28,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-20 01:49:28,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-07-20 01:49:28,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-20 01:49:28,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 231 transitions. [2020-07-20 01:49:28,132 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 231 transitions. Word has length 168 [2020-07-20 01:49:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:28,134 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 231 transitions. [2020-07-20 01:49:28,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 01:49:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 231 transitions. [2020-07-20 01:49:28,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-20 01:49:28,137 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:28,137 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 31, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:28,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:49:28,338 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:28,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:28,339 INFO L82 PathProgramCache]: Analyzing trace with hash 948653961, now seen corresponding path program 11 times [2020-07-20 01:49:28,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:28,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396365083] [2020-07-20 01:49:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa7d42d [2020-07-20 01:49:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 10 proven. 790 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-07-20 01:49:28,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396365083] [2020-07-20 01:49:28,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285017351] [2020-07-20 01:49:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@42cd5c22 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true