/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:43:16,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:43:16,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:43:16,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:43:16,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:43:16,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:43:16,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:43:16,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:43:16,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:43:16,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:43:16,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:43:16,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:43:16,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:43:16,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:43:16,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:43:16,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:43:16,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:43:16,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:43:16,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:43:16,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:43:16,193 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 [2021-05-02 14:43:16,230 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:43:16,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:43:16,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:43:16,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:43:16,233 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:43:16,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:43:16,234 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:43:16,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:43:16,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:43:16,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:43:16,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:43:16,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:43:16,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:43:16,235 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:43:16,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:43:16,236 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:43:16,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:43:16,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:43:16,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:43:16,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:43:16,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:43:16,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:43:16,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:43:16,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:43:16,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:43:16,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:43:16,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:43:16,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:43:16,238 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:43:16,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:43:16,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:43:16,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:43:16,522 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:43:16,522 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:43:16,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound5.i [2021-05-02 14:43:16,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5025d07ee/3d5f7d80c1b9499f9b58b983a9166a1b/FLAG0a2b521cb [2021-05-02 14:43:16,997 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:43:16,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound5.i [2021-05-02 14:43:17,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5025d07ee/3d5f7d80c1b9499f9b58b983a9166a1b/FLAG0a2b521cb [2021-05-02 14:43:17,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5025d07ee/3d5f7d80c1b9499f9b58b983a9166a1b [2021-05-02 14:43:17,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:43:17,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:43:17,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:43:17,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:43:17,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:43:17,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:43:17" (1/1) ... [2021-05-02 14:43:17,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef47d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:17, skipping insertion in model container [2021-05-02 14:43:17,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:43:17" (1/1) ... [2021-05-02 14:43:17,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:43:17,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:43:17,549 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound5.i[958,971] [2021-05-02 14:43:17,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:43:17,568 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:43:17,638 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound5.i[958,971] [2021-05-02 14:43:17,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:43:17,655 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:43:17,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:17 WrapperNode [2021-05-02 14:43:17,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:43:17,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:43:17,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:43:17,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:43:17,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:17" (1/1) ... [2021-05-02 14:43:17,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:17" (1/1) ... [2021-05-02 14:43:17,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:17" (1/1) ... [2021-05-02 14:43:17,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:17" (1/1) ... [2021-05-02 14:43:17,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:17" (1/1) ... [2021-05-02 14:43:17,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:17" (1/1) ... [2021-05-02 14:43:17,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:17" (1/1) ... [2021-05-02 14:43:17,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:43:17,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:43:17,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:43:17,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:43:17,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:17" (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 [2021-05-02 14:43:17,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:43:17,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:43:17,743 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:43:17,743 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:43:17,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:43:17,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:43:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:43:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:43:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 14:43:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 14:43:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:43:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:43:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 14:43:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:43:17,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:43:17,747 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:43:17,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:43:17,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:43:17,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:43:17,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:43:17,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:43:17,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:43:18,050 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:43:18,050 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:43:18,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:43:18 BoogieIcfgContainer [2021-05-02 14:43:18,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:43:18,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:43:18,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:43:18,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:43:18,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:43:17" (1/3) ... [2021-05-02 14:43:18,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241681ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:43:18, skipping insertion in model container [2021-05-02 14:43:18,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:17" (2/3) ... [2021-05-02 14:43:18,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241681ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:43:18, skipping insertion in model container [2021-05-02 14:43:18,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:43:18" (3/3) ... [2021-05-02 14:43:18,058 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound5.i [2021-05-02 14:43:18,062 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:43:18,065 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:43:18,077 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:43:18,093 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:43:18,093 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:43:18,093 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:43:18,093 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:43:18,093 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:43:18,093 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:43:18,093 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:43:18,093 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:43:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:43:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:43:18,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:18,110 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:43:18,110 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:18,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:18,114 INFO L82 PathProgramCache]: Analyzing trace with hash 291922115, now seen corresponding path program 1 times [2021-05-02 14:43:18,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:18,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050250800] [2021-05-02 14:43:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:18,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:43:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:18,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:43:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:18,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:43:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:18,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:43:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:18,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:43:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:43:18,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:43:18,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050250800] [2021-05-02 14:43:18,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050250800] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:43:18,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:43:18,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:43:18,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146022957] [2021-05-02 14:43:18,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:43:18,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:43:18,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:43:18,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:43:18,342 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:43:18,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:43:18,469 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2021-05-02 14:43:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:43:18,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 14:43:18,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:43:18,476 INFO L225 Difference]: With dead ends: 61 [2021-05-02 14:43:18,476 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 14:43:18,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:43:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 14:43:18,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 14:43:18,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:43:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 14:43:18,531 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-02 14:43:18,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:43:18,531 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 14:43:18,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:43:18,531 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 14:43:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 14:43:18,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:18,534 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:43:18,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:43:18,534 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:18,535 INFO L82 PathProgramCache]: Analyzing trace with hash -245963777, now seen corresponding path program 1 times [2021-05-02 14:43:18,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:18,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419173180] [2021-05-02 14:43:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:18,573 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:43:18,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369489664] [2021-05-02 14:43:18,573 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 [2021-05-02 14:43:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:18,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:43:18,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:43:18,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:18,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:18,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:18,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:18,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:18,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:18,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:18,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:18,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:18,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:18,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:18,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:43:18,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:43:18,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419173180] [2021-05-02 14:43:18,945 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:43:18,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369489664] [2021-05-02 14:43:18,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369489664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:43:18,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:43:18,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:43:18,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035156274] [2021-05-02 14:43:18,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:43:18,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:43:18,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:43:18,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:43:18,952 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:43:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:43:19,211 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-02 14:43:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:43:19,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-02 14:43:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:43:19,214 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:43:19,214 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 14:43:19,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:43:19,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 14:43:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-02 14:43:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:43:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-02 14:43:19,224 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-02 14:43:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:43:19,225 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-02 14:43:19,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:43:19,226 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-02 14:43:19,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 14:43:19,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:19,227 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:43:19,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:43:19,441 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:19,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:19,442 INFO L82 PathProgramCache]: Analyzing trace with hash 397552474, now seen corresponding path program 1 times [2021-05-02 14:43:19,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:19,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992592831] [2021-05-02 14:43:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:19,472 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:43:19,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349860645] [2021-05-02 14:43:19,473 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 [2021-05-02 14:43:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:19,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:43:19,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:43:19,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:19,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:19,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:19,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:19,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:19,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:19,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:19,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:19,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:19,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:43:19,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:43:19,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992592831] [2021-05-02 14:43:19,825 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:43:19,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349860645] [2021-05-02 14:43:19,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349860645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:43:19,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:43:19,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:43:19,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98380263] [2021-05-02 14:43:19,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:43:19,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:43:19,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:43:19,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:43:19,828 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:43:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:43:20,080 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 14:43:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:43:20,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-02 14:43:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:43:20,084 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:43:20,085 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:43:20,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:43:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:43:20,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-02 14:43:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:43:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 14:43:20,101 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 37 [2021-05-02 14:43:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:43:20,102 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 14:43:20,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:43:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 14:43:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:43:20,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:20,103 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:43:20,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:43:20,304 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:20,305 INFO L82 PathProgramCache]: Analyzing trace with hash -382866049, now seen corresponding path program 1 times [2021-05-02 14:43:20,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:20,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046082938] [2021-05-02 14:43:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:20,321 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:43:20,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668458465] [2021-05-02 14:43:20,321 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 [2021-05-02 14:43:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:20,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 14:43:20,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:43:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:43:20,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:43:20,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046082938] [2021-05-02 14:43:20,491 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:43:20,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668458465] [2021-05-02 14:43:20,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668458465] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:43:20,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:43:20,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:43:20,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57527904] [2021-05-02 14:43:20,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:43:20,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:43:20,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:43:20,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:43:20,493 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:43:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:43:20,514 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-05-02 14:43:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:43:20,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-05-02 14:43:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:43:20,515 INFO L225 Difference]: With dead ends: 61 [2021-05-02 14:43:20,515 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 14:43:20,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:43:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 14:43:20,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 14:43:20,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:43:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-02 14:43:20,522 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 43 [2021-05-02 14:43:20,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:43:20,522 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-02 14:43:20,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:43:20,523 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-02 14:43:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 14:43:20,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:20,524 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:43:20,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:43:20,739 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:20,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:20,739 INFO L82 PathProgramCache]: Analyzing trace with hash 866494938, now seen corresponding path program 1 times [2021-05-02 14:43:20,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:20,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750953342] [2021-05-02 14:43:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:20,754 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:43:20,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161030332] [2021-05-02 14:43:20,754 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 [2021-05-02 14:43:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:20,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:43:20,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:43:20,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:20,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:20,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:20,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:20,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:20,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:20,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:20,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:20,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:20,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 14:43:21,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:43:21,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750953342] [2021-05-02 14:43:21,017 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:43:21,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161030332] [2021-05-02 14:43:21,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161030332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:43:21,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:43:21,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:43:21,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696708039] [2021-05-02 14:43:21,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:43:21,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:43:21,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:43:21,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:43:21,018 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:43:21,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:43:21,133 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-05-02 14:43:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:43:21,134 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2021-05-02 14:43:21,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:43:21,135 INFO L225 Difference]: With dead ends: 49 [2021-05-02 14:43:21,135 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 14:43:21,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:43:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 14:43:21,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 14:43:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:43:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-05-02 14:43:21,141 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 45 [2021-05-02 14:43:21,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:43:21,141 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-05-02 14:43:21,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:43:21,142 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-05-02 14:43:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 14:43:21,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:21,143 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:43:21,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:43:21,365 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:21,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2104666202, now seen corresponding path program 2 times [2021-05-02 14:43:21,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:21,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584247662] [2021-05-02 14:43:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:21,379 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:43:21,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179760252] [2021-05-02 14:43:21,379 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 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 [2021-05-02 14:43:21,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:43:21,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:43:21,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:43:21,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:43:21,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:21,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:21,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:21,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:21,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:21,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:21,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:21,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:21,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:21,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:22,905 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 26 [2021-05-02 14:43:23,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:23,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:23,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:43:29,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:43:29,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584247662] [2021-05-02 14:43:29,065 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:43:29,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179760252] [2021-05-02 14:43:29,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179760252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:43:29,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:43:29,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:43:29,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919158167] [2021-05-02 14:43:29,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:43:29,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:43:29,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:43:29,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:43:29,066 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:43:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:43:29,551 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2021-05-02 14:43:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:43:29,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2021-05-02 14:43:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:43:29,555 INFO L225 Difference]: With dead ends: 81 [2021-05-02 14:43:29,555 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 14:43:29,556 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1362.7ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:43:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 14:43:29,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 14:43:29,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:43:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-05-02 14:43:29,561 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 53 [2021-05-02 14:43:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:43:29,561 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-05-02 14:43:29,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:43:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-05-02 14:43:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 14:43:29,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:29,562 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:43:29,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:43:29,769 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:29,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:29,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1069215477, now seen corresponding path program 3 times [2021-05-02 14:43:29,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:29,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050329728] [2021-05-02 14:43:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:29,779 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:43:29,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288197129] [2021-05-02 14:43:29,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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