/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/bitvector/jain_7-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:56:20,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:56:21,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:56:21,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:56:21,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:56:21,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:56:21,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:56:21,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:56:21,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:56:21,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:56:21,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:56:21,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:56:21,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:56:21,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:56:21,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:56:21,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:56:21,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:56:21,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:56:21,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:56:21,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:56:21,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:56:21,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:56:21,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:56:21,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:56:21,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:56:21,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:56:21,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:56:21,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:56:21,158 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 17:56:21,212 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:56:21,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:56:21,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:56:21,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:56:21,215 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:56:21,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:56:21,215 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:56:21,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:56:21,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:56:21,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:56:21,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:56:21,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:56:21,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:56:21,217 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:56:21,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:56:21,217 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:56:21,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:56:21,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:56:21,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:56:21,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:56:21,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:56:21,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:56:21,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:56:21,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:56:21,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:56:21,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:56:21,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:56:21,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:56:21,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:56:21,220 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:56:21,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:56:21,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:56:21,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:56:21,644 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:56:21,644 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:56:21,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/jain_7-2.c [2020-10-23 17:56:21,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c3649b78/a788e39d847d4914bfbfb5e69a6684b3/FLAGc95bbfd43 [2020-10-23 17:56:22,371 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:56:22,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/jain_7-2.c [2020-10-23 17:56:22,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c3649b78/a788e39d847d4914bfbfb5e69a6684b3/FLAGc95bbfd43 [2020-10-23 17:56:22,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c3649b78/a788e39d847d4914bfbfb5e69a6684b3 [2020-10-23 17:56:22,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:56:22,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:56:22,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:22,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:56:22,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:56:22,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:22,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fa210c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22, skipping insertion in model container [2020-10-23 17:56:22,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:22,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:56:22,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:56:22,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:22,948 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:56:22,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:22,985 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:56:22,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22 WrapperNode [2020-10-23 17:56:22,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:22,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:56:22,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:56:22,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:56:23,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:23,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:23,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:23,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:23,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:23,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:23,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (1/1) ... [2020-10-23 17:56:23,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:56:23,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:56:23,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:56:23,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:56:23,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (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 17:56:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:56:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:56:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:56:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 17:56:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:56:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:56:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:56:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:56:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:56:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 17:56:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 17:56:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:56:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:56:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:56:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:56:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:56:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:56:23,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:56:23,454 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:56:23,454 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 17:56:23,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:23 BoogieIcfgContainer [2020-10-23 17:56:23,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:56:23,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:56:23,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:56:23,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:56:23,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:56:22" (1/3) ... [2020-10-23 17:56:23,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639c37f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:23, skipping insertion in model container [2020-10-23 17:56:23,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:22" (2/3) ... [2020-10-23 17:56:23,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639c37f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:23, skipping insertion in model container [2020-10-23 17:56:23,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:23" (3/3) ... [2020-10-23 17:56:23,510 INFO L111 eAbstractionObserver]: Analyzing ICFG jain_7-2.c [2020-10-23 17:56:23,558 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:56:23,579 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:56:23,598 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:56:23,631 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:56:23,631 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:56:23,632 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:56:23,632 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:56:23,632 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:56:23,632 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:56:23,633 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:56:23,633 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:56:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-23 17:56:23,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 17:56:23,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:23,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:23,663 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:23,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:23,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1199457490, now seen corresponding path program 1 times [2020-10-23 17:56:23,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:23,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211648922] [2020-10-23 17:56:23,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:24,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:24,277 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 17:56:24,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211648922] [2020-10-23 17:56:24,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:56:24,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 17:56:24,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460004315] [2020-10-23 17:56:24,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 17:56:24,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:24,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 17:56:24,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:56:24,305 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 7 states. [2020-10-23 17:56:24,503 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-23 17:56:24,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:24,875 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-10-23 17:56:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 17:56:24,878 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-23 17:56:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:24,887 INFO L225 Difference]: With dead ends: 39 [2020-10-23 17:56:24,887 INFO L226 Difference]: Without dead ends: 22 [2020-10-23 17:56:24,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 17:56:24,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-23 17:56:24,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-23 17:56:24,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-23 17:56:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-23 17:56:24,938 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2020-10-23 17:56:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:24,938 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-23 17:56:24,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 17:56:24,939 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-23 17:56:24,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 17:56:24,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:24,940 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:24,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:56:24,940 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:24,942 INFO L82 PathProgramCache]: Analyzing trace with hash -680978417, now seen corresponding path program 1 times [2020-10-23 17:56:24,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:24,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803005724] [2020-10-23 17:56:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:25,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:25,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:56:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 17:56:25,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803005724] [2020-10-23 17:56:25,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289123117] [2020-10-23 17:56:25,228 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