/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:45:15,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:45:15,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:45:15,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:45:15,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:45:15,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:45:15,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:45:15,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:45:15,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:45:15,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:45:15,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:45:15,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:45:15,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:45:15,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:45:15,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:45:15,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:45:15,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:45:15,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:45:15,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:45:15,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:45:15,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:45:15,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:45:15,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:45:15,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:45:15,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:45:15,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:45:15,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:45:15,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:45:15,192 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 [2020-10-23 18:45:15,221 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:45:15,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:45:15,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:45:15,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:45:15,224 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:45:15,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:45:15,224 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:45:15,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:45:15,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:45:15,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:45:15,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:45:15,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:45:15,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:45:15,225 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:45:15,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:45:15,226 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:45:15,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:45:15,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:45:15,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:45:15,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:45:15,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:45:15,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:45:15,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:45:15,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:45:15,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:45:15,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:45:15,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:45:15,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:45:15,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:45:15,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:45:15,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:45:15,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:45:15,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:45:15,689 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:45:15,689 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:45:15,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-10-23 18:45:15,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/906a6d6d3/62666e14e91b42ae8846733125913720/FLAG07bab8e2c [2020-10-23 18:45:16,315 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:45:16,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-10-23 18:45:16,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/906a6d6d3/62666e14e91b42ae8846733125913720/FLAG07bab8e2c [2020-10-23 18:45:16,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/906a6d6d3/62666e14e91b42ae8846733125913720 [2020-10-23 18:45:16,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:45:16,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:45:16,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:16,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:45:16,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:45:16,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:16" (1/1) ... [2020-10-23 18:45:16,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7de36b5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:16, skipping insertion in model container [2020-10-23 18:45:16,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:16" (1/1) ... [2020-10-23 18:45:16,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:45:16,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:45:16,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:16,977 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:45:17,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:17,018 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:45:17,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:17 WrapperNode [2020-10-23 18:45:17,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:17,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:45:17,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:45:17,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:45:17,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:17" (1/1) ... [2020-10-23 18:45:17,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:17" (1/1) ... [2020-10-23 18:45:17,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:17" (1/1) ... [2020-10-23 18:45:17,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:17" (1/1) ... [2020-10-23 18:45:17,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:17" (1/1) ... [2020-10-23 18:45:17,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:17" (1/1) ... [2020-10-23 18:45:17,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:17" (1/1) ... [2020-10-23 18:45:17,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:45:17,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:45:17,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:45:17,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:45:17,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:17" (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 [2020-10-23 18:45:17,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:45:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:45:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:45:17,212 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:45:17,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:45:17,212 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:45:17,213 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:45:17,214 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:45:17,214 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:45:17,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:45:17,215 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:45:17,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:45:17,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:45:17,216 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:45:17,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:45:17,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:45:17,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:45:17,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:45:17,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:45:17,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:45:17,551 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:45:17,551 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:45:17,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:17 BoogieIcfgContainer [2020-10-23 18:45:17,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:45:17,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:45:17,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:45:17,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:45:17,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:45:16" (1/3) ... [2020-10-23 18:45:17,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b978c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:17, skipping insertion in model container [2020-10-23 18:45:17,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:17" (2/3) ... [2020-10-23 18:45:17,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b978c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:17, skipping insertion in model container [2020-10-23 18:45:17,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:17" (3/3) ... [2020-10-23 18:45:17,568 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt7.c [2020-10-23 18:45:17,582 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:45:17,588 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:45:17,604 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:45:17,649 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:45:17,650 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:45:17,650 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:45:17,653 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:45:17,653 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:45:17,653 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:45:17,653 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:45:17,654 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:45:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-23 18:45:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:45:17,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:17,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:17,708 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:17,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:17,723 INFO L82 PathProgramCache]: Analyzing trace with hash 670636958, now seen corresponding path program 1 times [2020-10-23 18:45:17,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:17,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318904040] [2020-10-23 18:45:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:18,399 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-10-23 18:45:18,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:18,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318904040] [2020-10-23 18:45:18,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:45:18,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 18:45:18,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724435469] [2020-10-23 18:45:18,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:45:18,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:18,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:45:18,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:45:18,546 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 8 states. [2020-10-23 18:45:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:23,369 INFO L93 Difference]: Finished difference Result 71 states and 101 transitions. [2020-10-23 18:45:23,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:45:23,371 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-23 18:45:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:23,385 INFO L225 Difference]: With dead ends: 71 [2020-10-23 18:45:23,385 INFO L226 Difference]: Without dead ends: 36 [2020-10-23 18:45:23,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:45:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-23 18:45:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-23 18:45:23,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-23 18:45:23,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-23 18:45:23,453 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2020-10-23 18:45:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:23,454 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-23 18:45:23,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:45:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-23 18:45:23,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:45:23,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:23,457 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:23,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:45:23,457 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:23,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:23,458 INFO L82 PathProgramCache]: Analyzing trace with hash 506448450, now seen corresponding path program 1 times [2020-10-23 18:45:23,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:23,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529875659] [2020-10-23 18:45:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:23,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:23,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:23,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529875659] [2020-10-23 18:45:23,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362229002] [2020-10-23 18:45:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:23,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-23 18:45:23,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:24,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:24,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2020-10-23 18:45:24,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939136713] [2020-10-23 18:45:24,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:45:24,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:24,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:45:24,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:45:24,029 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 12 states. [2020-10-23 18:45:24,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:24,591 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-10-23 18:45:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:45:24,593 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-23 18:45:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:24,595 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:45:24,595 INFO L226 Difference]: Without dead ends: 39 [2020-10-23 18:45:24,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:45:24,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-23 18:45:24,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-23 18:45:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:45:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-23 18:45:24,616 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 23 [2020-10-23 18:45:24,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:24,617 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-23 18:45:24,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:45:24,618 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-23 18:45:24,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:45:24,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:24,622 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:24,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:45:24,824 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:24,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:24,826 INFO L82 PathProgramCache]: Analyzing trace with hash -882654766, now seen corresponding path program 1 times [2020-10-23 18:45:24,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:24,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848417701] [2020-10-23 18:45:24,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:25,163 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-10-23 18:45:25,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:25,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:25,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848417701] [2020-10-23 18:45:25,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830737112] [2020-10-23 18:45:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:25,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-23 18:45:25,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:25,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:25,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:25,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-10-23 18:45:25,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773399812] [2020-10-23 18:45:25,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:45:25,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:25,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:45:25,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:45:25,588 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 15 states. [2020-10-23 18:45:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:26,412 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-10-23 18:45:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:45:26,413 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-10-23 18:45:26,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:26,414 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:45:26,415 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 18:45:26,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:45:26,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 18:45:26,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-23 18:45:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 18:45:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-23 18:45:26,428 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 28 [2020-10-23 18:45:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:26,428 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-23 18:45:26,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:45:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-23 18:45:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 18:45:26,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:26,430 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:26,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:26,646 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:26,647 INFO L82 PathProgramCache]: Analyzing trace with hash -868787812, now seen corresponding path program 1 times [2020-10-23 18:45:26,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:26,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463355415] [2020-10-23 18:45:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:27,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:27,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:27,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:45:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:45:27,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463355415] [2020-10-23 18:45:27,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730055366] [2020-10-23 18:45:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:27,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-23 18:45:27,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:27,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:45:27,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:27,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-10-23 18:45:27,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28217340] [2020-10-23 18:45:27,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:45:27,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:27,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:45:27,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:45:27,649 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 19 states. [2020-10-23 18:45:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:28,981 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2020-10-23 18:45:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:45:28,982 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-10-23 18:45:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:28,985 INFO L225 Difference]: With dead ends: 79 [2020-10-23 18:45:28,985 INFO L226 Difference]: Without dead ends: 63 [2020-10-23 18:45:28,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:45:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-23 18:45:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-23 18:45:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 18:45:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-10-23 18:45:29,006 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 41 [2020-10-23 18:45:29,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:29,006 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-10-23 18:45:29,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:45:29,006 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-10-23 18:45:29,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-23 18:45:29,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:29,008 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:29,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:29,213 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:29,214 INFO L82 PathProgramCache]: Analyzing trace with hash -944025398, now seen corresponding path program 1 times [2020-10-23 18:45:29,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:29,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450132008] [2020-10-23 18:45:29,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:29,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:29,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:29,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:45:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:29,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 18:45:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-23 18:45:29,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450132008] [2020-10-23 18:45:29,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557685338] [2020-10-23 18:45:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:29,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-23 18:45:29,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:30,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-23 18:45:30,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:30,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2020-10-23 18:45:30,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579622846] [2020-10-23 18:45:30,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 18:45:30,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:30,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 18:45:30,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:45:30,294 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 23 states. [2020-10-23 18:45:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:31,827 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-10-23 18:45:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:45:31,830 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-23 18:45:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:31,831 INFO L225 Difference]: With dead ends: 90 [2020-10-23 18:45:31,831 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:45:31,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 18:45:31,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:45:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-23 18:45:31,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-23 18:45:31,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-10-23 18:45:31,863 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 53 [2020-10-23 18:45:31,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:31,863 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-10-23 18:45:31,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 18:45:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-10-23 18:45:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 18:45:31,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:31,871 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:32,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:32,086 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:32,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:32,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1099424193, now seen corresponding path program 1 times [2020-10-23 18:45:32,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:32,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005434070] [2020-10-23 18:45:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:32,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:32,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:32,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:45:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:32,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 18:45:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:32,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-23 18:45:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-23 18:45:32,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005434070] [2020-10-23 18:45:32,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370342358] [2020-10-23 18:45:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:32,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-23 18:45:32,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:33,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-23 18:45:33,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:33,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-10-23 18:45:33,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854411845] [2020-10-23 18:45:33,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 18:45:33,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:33,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 18:45:33,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:45:33,538 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 27 states. [2020-10-23 18:45:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:35,583 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2020-10-23 18:45:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:45:35,584 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-23 18:45:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:35,590 INFO L225 Difference]: With dead ends: 100 [2020-10-23 18:45:35,590 INFO L226 Difference]: Without dead ends: 84 [2020-10-23 18:45:35,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2020-10-23 18:45:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-23 18:45:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-23 18:45:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-23 18:45:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-10-23 18:45:35,622 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 64 [2020-10-23 18:45:35,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:35,623 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-10-23 18:45:35,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 18:45:35,626 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-10-23 18:45:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-23 18:45:35,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:35,630 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:35,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:45:35,844 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:35,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash -71800728, now seen corresponding path program 1 times [2020-10-23 18:45:35,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:35,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448418749] [2020-10-23 18:45:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:45:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 18:45:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-23 18:45:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-23 18:45:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:45:36,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448418749] [2020-10-23 18:45:36,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311698981] [2020-10-23 18:45:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-23 18:45:36,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:37,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:45:37,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:37,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2020-10-23 18:45:37,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766349847] [2020-10-23 18:45:37,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-23 18:45:37,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:37,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-23 18:45:37,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2020-10-23 18:45:37,579 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 31 states. [2020-10-23 18:45:41,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:41,812 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-10-23 18:45:41,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:45:41,813 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 74 [2020-10-23 18:45:41,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:41,815 INFO L225 Difference]: With dead ends: 109 [2020-10-23 18:45:41,815 INFO L226 Difference]: Without dead ends: 93 [2020-10-23 18:45:41,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=250, Invalid=1912, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 18:45:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-23 18:45:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-23 18:45:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-23 18:45:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2020-10-23 18:45:41,830 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 74 [2020-10-23 18:45:41,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:41,830 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2020-10-23 18:45:41,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-23 18:45:41,831 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2020-10-23 18:45:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-23 18:45:41,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:41,832 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:42,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:42,042 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash -570833668, now seen corresponding path program 1 times [2020-10-23 18:45:42,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:42,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695188033] [2020-10-23 18:45:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:45:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 18:45:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-23 18:45:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-23 18:45:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-23 18:45:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 12 proven. 119 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-23 18:45:42,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695188033] [2020-10-23 18:45:42,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324807732] [2020-10-23 18:45:42,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:43,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 47 conjunts are in the unsatisfiable core [2020-10-23 18:45:43,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:43,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 12 proven. 119 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-23 18:45:43,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:43,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2020-10-23 18:45:43,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610328478] [2020-10-23 18:45:43,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-23 18:45:43,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:43,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-23 18:45:43,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 18:45:43,916 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand 35 states. [2020-10-23 18:45:46,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:46,630 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2020-10-23 18:45:46,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 18:45:46,631 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 83 [2020-10-23 18:45:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:46,633 INFO L225 Difference]: With dead ends: 126 [2020-10-23 18:45:46,634 INFO L226 Difference]: Without dead ends: 110 [2020-10-23 18:45:46,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=330, Invalid=2640, Unknown=0, NotChecked=0, Total=2970 [2020-10-23 18:45:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-23 18:45:46,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2020-10-23 18:45:46,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-23 18:45:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2020-10-23 18:45:46,660 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 83 [2020-10-23 18:45:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:46,660 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2020-10-23 18:45:46,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-23 18:45:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2020-10-23 18:45:46,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-23 18:45:46,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:46,663 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 6, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:46,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:46,878 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:46,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:46,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1973273156, now seen corresponding path program 2 times [2020-10-23 18:45:46,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:46,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729647371] [2020-10-23 18:45:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:45:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 18:45:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-23 18:45:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-23 18:45:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-23 18:45:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-23 18:45:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-23 18:45:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 32 proven. 163 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-23 18:45:47,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729647371] [2020-10-23 18:45:47,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787312754] [2020-10-23 18:45:47,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true