/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/egcd2-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:31:27,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:31:27,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:31:27,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:31:27,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:31:27,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:31:27,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:31:27,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:31:27,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:31:27,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:31:27,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:31:27,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:31:27,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:31:27,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:31:27,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:31:27,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:31:27,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:31:27,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:31:27,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:31:27,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:31:27,776 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 [2021-05-06 02:31:27,826 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:31:27,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:31:27,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:31:27,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:31:27,830 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:31:27,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:31:27,831 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:31:27,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:31:27,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:31:27,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:31:27,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:31:27,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:31:27,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:31:27,832 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:31:27,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:31:27,832 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:31:27,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:31:27,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:31:27,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:31:27,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:31:27,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:31:27,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:31:27,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:31:27,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:31:27,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:31:27,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:31:27,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:31:27,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:31:27,834 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:31:28,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:31:28,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:31:28,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:31:28,113 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:31:28,113 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:31:28,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2021-05-06 02:31:28,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a80fe539/34873606c5b048f290d2c0c7eacaaade/FLAG8ebb7a2e7 [2021-05-06 02:31:28,640 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:31:28,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2021-05-06 02:31:28,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a80fe539/34873606c5b048f290d2c0c7eacaaade/FLAG8ebb7a2e7 [2021-05-06 02:31:28,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a80fe539/34873606c5b048f290d2c0c7eacaaade [2021-05-06 02:31:28,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:31:28,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:31:28,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:31:28,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:31:28,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:31:28,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:31:28" (1/1) ... [2021-05-06 02:31:28,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@296d8d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:28, skipping insertion in model container [2021-05-06 02:31:28,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:31:28" (1/1) ... [2021-05-06 02:31:28,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:31:28,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:31:28,795 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/egcd2-ll_unwindbound5.c[490,503] [2021-05-06 02:31:28,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:31:28,817 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:31:28,828 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/egcd2-ll_unwindbound5.c[490,503] [2021-05-06 02:31:28,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:31:28,848 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:31:28,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:28 WrapperNode [2021-05-06 02:31:28,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:31:28,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:31:28,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:31:28,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:31:28,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:28" (1/1) ... [2021-05-06 02:31:28,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:28" (1/1) ... [2021-05-06 02:31:28,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:28" (1/1) ... [2021-05-06 02:31:28,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:28" (1/1) ... [2021-05-06 02:31:28,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:28" (1/1) ... [2021-05-06 02:31:28,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:28" (1/1) ... [2021-05-06 02:31:28,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:28" (1/1) ... [2021-05-06 02:31:28,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:31:28,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:31:28,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:31:28,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:31:28,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:28" (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 [2021-05-06 02:31:28,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:31:28,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:31:28,989 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:31:28,989 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:31:28,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:31:28,990 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:31:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:31:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:31:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:31:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:31:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:31:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:31:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:31:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:31:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:31:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:31:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:31:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:31:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:31:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:31:29,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:31:29,224 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:31:29,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:31:29 BoogieIcfgContainer [2021-05-06 02:31:29,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:31:29,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:31:29,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:31:29,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:31:29,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:31:28" (1/3) ... [2021-05-06 02:31:29,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a895efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:31:29, skipping insertion in model container [2021-05-06 02:31:29,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:28" (2/3) ... [2021-05-06 02:31:29,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a895efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:31:29, skipping insertion in model container [2021-05-06 02:31:29,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:31:29" (3/3) ... [2021-05-06 02:31:29,231 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound5.c [2021-05-06 02:31:29,235 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:31:29,238 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:31:29,252 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:31:29,285 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:31:29,285 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:31:29,285 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:31:29,285 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:31:29,285 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:31:29,285 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:31:29,285 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:31:29,286 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:31:29,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 02:31:29,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 02:31:29,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:29,303 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] [2021-05-06 02:31:29,304 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2021-05-06 02:31:29,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:29,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955258021] [2021-05-06 02:31:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:29,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:31:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:29,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:31:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:29,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:31:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:29,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:31:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:29,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:31:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:31:29,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:29,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955258021] [2021-05-06 02:31:29,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955258021] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:31:29,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:31:29,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:31:29,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398770114] [2021-05-06 02:31:29,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:31:29,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:29,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:31:29,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:31:29,566 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-05-06 02:31:29,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:29,842 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2021-05-06 02:31:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:31:29,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 32 [2021-05-06 02:31:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:29,850 INFO L225 Difference]: With dead ends: 72 [2021-05-06 02:31:29,851 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:31:29,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:31:29,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:31:29,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-06 02:31:29,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 02:31:29,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-06 02:31:29,902 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-06 02:31:29,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:29,903 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-06 02:31:29,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-05-06 02:31:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-06 02:31:29,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:31:29,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:29,906 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] [2021-05-06 02:31:29,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:31:29,906 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:29,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:29,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2021-05-06 02:31:29,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:29,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416854392] [2021-05-06 02:31:29,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:29,941 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:29,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726388921] [2021-05-06 02:31:29,942 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 [2021-05-06 02:31:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:30,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:31:30,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:30,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:30,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:30,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:30,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:30,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:31:30,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:30,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416854392] [2021-05-06 02:31:30,123 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:30,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726388921] [2021-05-06 02:31:30,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726388921] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:31:30,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:31:30,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:31:30,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144904282] [2021-05-06 02:31:30,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:31:30,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:30,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:31:30,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:31:30,127 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:30,144 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-05-06 02:31:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:31:30,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:31:30,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:30,146 INFO L225 Difference]: With dead ends: 44 [2021-05-06 02:31:30,146 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 02:31:30,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:31:30,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 02:31:30,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 02:31:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 02:31:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-06 02:31:30,154 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-06 02:31:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:30,156 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-06 02:31:30,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-06 02:31:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:31:30,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:30,157 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] [2021-05-06 02:31:30,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:31:30,373 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:30,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2021-05-06 02:31:30,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:30,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160992679] [2021-05-06 02:31:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:30,403 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:30,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800226546] [2021-05-06 02:31:30,403 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 [2021-05-06 02:31:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:30,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:31:30,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:30,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:30,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:30,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:30,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:30,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:31:30,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:30,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160992679] [2021-05-06 02:31:30,641 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:30,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800226546] [2021-05-06 02:31:30,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800226546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:30,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:30,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:31:30,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609435202] [2021-05-06 02:31:30,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:31:30,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:30,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:31:30,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:31:30,643 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-05-06 02:31:30,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:30,761 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2021-05-06 02:31:30,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:31:30,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 34 [2021-05-06 02:31:30,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:30,762 INFO L225 Difference]: With dead ends: 53 [2021-05-06 02:31:30,762 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 02:31:30,763 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:30,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 02:31:30,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-06 02:31:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 02:31:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 02:31:30,771 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-06 02:31:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:30,771 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 02:31:30,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-05-06 02:31:30,771 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 02:31:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 02:31:30,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:30,772 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, 1] [2021-05-06 02:31:30,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:30,975 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:30,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:30,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2021-05-06 02:31:30,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:30,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893406181] [2021-05-06 02:31:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:30,989 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:30,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985851848] [2021-05-06 02:31:30,989 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 [2021-05-06 02:31:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:31,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:31:31,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:31,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:31:31,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:31,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893406181] [2021-05-06 02:31:31,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:31,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985851848] [2021-05-06 02:31:31,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985851848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:31,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:31,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:31:31,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390109960] [2021-05-06 02:31:31,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:31:31,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:31,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:31:31,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:31,194 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-05-06 02:31:31,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:31,321 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2021-05-06 02:31:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:31:31,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 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 36 [2021-05-06 02:31:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:31,323 INFO L225 Difference]: With dead ends: 59 [2021-05-06 02:31:31,323 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 02:31:31,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:31:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 02:31:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-05-06 02:31:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:31:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-05-06 02:31:31,333 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2021-05-06 02:31:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:31,333 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-05-06 02:31:31,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-05-06 02:31:31,333 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-05-06 02:31:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:31:31,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:31,334 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, 1, 1] [2021-05-06 02:31:31,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:31,549 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:31,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2021-05-06 02:31:31,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:31,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605682966] [2021-05-06 02:31:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:31,570 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:31,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817785896] [2021-05-06 02:31:31,570 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 [2021-05-06 02:31:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:31,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:31:31,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:31,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:31:31,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:31,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605682966] [2021-05-06 02:31:31,777 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:31,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817785896] [2021-05-06 02:31:31,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817785896] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:31:31,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:31:31,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:31:31,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236276069] [2021-05-06 02:31:31,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:31:31,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:31,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:31:31,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:31:31,779 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:31,815 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-05-06 02:31:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:31:31,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 02:31:31,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:31,818 INFO L225 Difference]: With dead ends: 63 [2021-05-06 02:31:31,818 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 02:31:31,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:31:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 02:31:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 02:31:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:31:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-05-06 02:31:31,825 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 39 [2021-05-06 02:31:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:31,826 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-05-06 02:31:31,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-05-06 02:31:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 02:31:31,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:31,827 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, 1, 1, 1, 1] [2021-05-06 02:31:32,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:32,050 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:32,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2021-05-06 02:31:32,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:32,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982577679] [2021-05-06 02:31:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:32,063 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:32,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804818477] [2021-05-06 02:31:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:32,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:31:32,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:32,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:31:32,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:32,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982577679] [2021-05-06 02:31:32,280 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:32,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804818477] [2021-05-06 02:31:32,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804818477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:32,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:32,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:31:32,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566485944] [2021-05-06 02:31:32,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:31:32,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:31:32,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:32,282 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 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) [2021-05-06 02:31:32,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:32,385 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-06 02:31:32,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:31:32,386 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 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 41 [2021-05-06 02:31:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:32,387 INFO L225 Difference]: With dead ends: 58 [2021-05-06 02:31:32,387 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 02:31:32,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:31:32,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 02:31:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 02:31:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:31:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-05-06 02:31:32,396 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-05-06 02:31:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:32,397 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-05-06 02:31:32,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 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) [2021-05-06 02:31:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-05-06 02:31:32,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 02:31:32,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:32,398 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:32,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:31:32,613 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:32,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:32,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2021-05-06 02:31:32,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:32,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179846897] [2021-05-06 02:31:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:32,620 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:32,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100108092] [2021-05-06 02:31:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:32,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:31:32,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:32,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:31:32,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:32,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179846897] [2021-05-06 02:31:32,895 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:32,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100108092] [2021-05-06 02:31:32,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100108092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:32,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:32,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:31:32,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73098811] [2021-05-06 02:31:32,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:31:32,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:31:32,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:32,898 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:31:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:33,024 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2021-05-06 02:31:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:31:33,025 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 02:31:33,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:33,026 INFO L225 Difference]: With dead ends: 62 [2021-05-06 02:31:33,026 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 02:31:33,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:31:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 02:31:33,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 02:31:33,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:31:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-05-06 02:31:33,035 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 46 [2021-05-06 02:31:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:33,035 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-05-06 02:31:33,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:31:33,035 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-05-06 02:31:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 02:31:33,036 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:33,036 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:33,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:33,241 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:33,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:33,242 INFO L82 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2021-05-06 02:31:33,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:33,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936168986] [2021-05-06 02:31:33,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:33,254 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:33,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131636889] [2021-05-06 02:31:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:33,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:31:33,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:33,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-06 02:31:33,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:33,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936168986] [2021-05-06 02:31:33,521 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:33,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131636889] [2021-05-06 02:31:33,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131636889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:33,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:33,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:31:33,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2767922] [2021-05-06 02:31:33,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:31:33,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:33,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:31:33,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:31:33,523 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:31:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:33,692 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-05-06 02:31:33,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:31:33,692 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 02:31:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:33,693 INFO L225 Difference]: With dead ends: 66 [2021-05-06 02:31:33,693 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 02:31:33,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:31:33,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 02:31:33,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-06 02:31:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:31:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-05-06 02:31:33,702 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 51 [2021-05-06 02:31:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:33,703 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-05-06 02:31:33,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:31:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-05-06 02:31:33,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 02:31:33,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:33,704 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1] [2021-05-06 02:31:33,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:33,923 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:33,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 1 times [2021-05-06 02:31:33,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:33,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247474439] [2021-05-06 02:31:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:33,938 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:33,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309282180] [2021-05-06 02:31:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:34,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:31:34,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:34,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:31:34,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:34,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247474439] [2021-05-06 02:31:34,143 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:34,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309282180] [2021-05-06 02:31:34,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309282180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:34,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:34,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:31:34,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342082510] [2021-05-06 02:31:34,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:31:34,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:34,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:31:34,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:31:34,148 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:31:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:34,253 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2021-05-06 02:31:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:31:34,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2021-05-06 02:31:34,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:34,256 INFO L225 Difference]: With dead ends: 96 [2021-05-06 02:31:34,256 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 02:31:34,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 02:31:34,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-05-06 02:31:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 02:31:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2021-05-06 02:31:34,283 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2021-05-06 02:31:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:34,283 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2021-05-06 02:31:34,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:31:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2021-05-06 02:31:34,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 02:31:34,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:34,287 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:34,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:31:34,502 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:34,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:34,503 INFO L82 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2021-05-06 02:31:34,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:34,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743440125] [2021-05-06 02:31:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:34,511 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:34,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51369660] [2021-05-06 02:31:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:34,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:31:34,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:34,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:34,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:34,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:34,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:34,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:34,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:34,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:34,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:34,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:34,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:34,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:31:34,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:34,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743440125] [2021-05-06 02:31:34,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:34,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51369660] [2021-05-06 02:31:34,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51369660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:34,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:34,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:31:34,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398739693] [2021-05-06 02:31:34,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:31:34,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:34,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:31:34,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:31:34,727 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:34,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:34,793 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2021-05-06 02:31:34,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:31:34,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2021-05-06 02:31:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:34,794 INFO L225 Difference]: With dead ends: 107 [2021-05-06 02:31:34,794 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 02:31:34,795 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 02:31:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 02:31:34,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 02:31:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-06 02:31:34,805 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 60 [2021-05-06 02:31:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:34,805 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-06 02:31:34,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-06 02:31:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:31:34,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:34,807 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:35,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:35,017 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2021-05-06 02:31:35,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:35,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549170157] [2021-05-06 02:31:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:35,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:35,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167384811] [2021-05-06 02:31:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:35,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:31:35,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:35,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 02:31:35,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:35,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549170157] [2021-05-06 02:31:35,222 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:35,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167384811] [2021-05-06 02:31:35,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167384811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:35,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:35,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:31:35,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035455095] [2021-05-06 02:31:35,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:31:35,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:35,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:31:35,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:35,224 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:31:35,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:35,423 INFO L93 Difference]: Finished difference Result 178 states and 253 transitions. [2021-05-06 02:31:35,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:31:35,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 02:31:35,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:35,426 INFO L225 Difference]: With dead ends: 178 [2021-05-06 02:31:35,426 INFO L226 Difference]: Without dead ends: 170 [2021-05-06 02:31:35,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:31:35,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-06 02:31:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2021-05-06 02:31:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 91 states have internal predecessors, (112), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 02:31:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2021-05-06 02:31:35,444 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 61 [2021-05-06 02:31:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:35,444 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2021-05-06 02:31:35,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:31:35,444 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2021-05-06 02:31:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 02:31:35,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:35,445 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:35,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:35,669 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:35,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:35,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 1 times [2021-05-06 02:31:35,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:35,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956050631] [2021-05-06 02:31:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:35,684 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:35,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993305387] [2021-05-06 02:31:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:35,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:31:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:35,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:31:35,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:35,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956050631] [2021-05-06 02:31:35,866 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:35,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993305387] [2021-05-06 02:31:35,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993305387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:35,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:35,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:31:35,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540481252] [2021-05-06 02:31:35,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:31:35,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:35,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:31:35,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:31:35,867 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:35,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:35,930 INFO L93 Difference]: Finished difference Result 175 states and 244 transitions. [2021-05-06 02:31:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:31:35,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-06 02:31:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:35,932 INFO L225 Difference]: With dead ends: 175 [2021-05-06 02:31:35,932 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 02:31:35,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 02:31:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-06 02:31:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 91 states have internal predecessors, (111), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 02:31:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-05-06 02:31:35,945 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 62 [2021-05-06 02:31:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:35,946 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-05-06 02:31:35,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-05-06 02:31:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:31:35,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:35,947 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:36,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:31:36,148 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:36,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:36,148 INFO L82 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 1 times [2021-05-06 02:31:36,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:36,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141605545] [2021-05-06 02:31:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:36,155 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:36,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777576948] [2021-05-06 02:31:36,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:36,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:31:36,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:36,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:31:36,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:36,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141605545] [2021-05-06 02:31:36,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:36,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777576948] [2021-05-06 02:31:36,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777576948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:36,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:36,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:31:36,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254750900] [2021-05-06 02:31:36,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:31:36,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:36,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:31:36,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:36,359 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:36,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:36,470 INFO L93 Difference]: Finished difference Result 245 states and 345 transitions. [2021-05-06 02:31:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:31:36,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-06 02:31:36,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:36,472 INFO L225 Difference]: With dead ends: 245 [2021-05-06 02:31:36,472 INFO L226 Difference]: Without dead ends: 169 [2021-05-06 02:31:36,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:36,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-06 02:31:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-05-06 02:31:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 108 states have internal predecessors, (130), 46 states have call successors, (46), 16 states have call predecessors, (46), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:31:36,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-05-06 02:31:36,487 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 66 [2021-05-06 02:31:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:36,488 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-05-06 02:31:36,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:36,488 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-05-06 02:31:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 02:31:36,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:36,489 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:36,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:31:36,709 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:36,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:36,709 INFO L82 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2021-05-06 02:31:36,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:36,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037027125] [2021-05-06 02:31:36,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:36,716 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:36,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908299270] [2021-05-06 02:31:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:36,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 02:31:36,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:36,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:31:36,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:36,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037027125] [2021-05-06 02:31:36,920 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:36,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908299270] [2021-05-06 02:31:36,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908299270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:36,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:36,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:31:36,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506760895] [2021-05-06 02:31:36,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:31:36,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:36,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:31:36,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:36,921 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:31:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:37,071 INFO L93 Difference]: Finished difference Result 214 states and 296 transitions. [2021-05-06 02:31:37,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:31:37,072 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 68 [2021-05-06 02:31:37,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:37,073 INFO L225 Difference]: With dead ends: 214 [2021-05-06 02:31:37,073 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 02:31:37,074 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:31:37,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 02:31:37,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2021-05-06 02:31:37,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.2857142857142858) internal successors, (162), 132 states have internal predecessors, (162), 65 states have call successors, (65), 17 states have call predecessors, (65), 16 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:31:37,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 289 transitions. [2021-05-06 02:31:37,092 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 289 transitions. Word has length 68 [2021-05-06 02:31:37,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:37,092 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 289 transitions. [2021-05-06 02:31:37,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:31:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 289 transitions. [2021-05-06 02:31:37,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 02:31:37,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:37,093 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:37,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:31:37,317 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:37,318 INFO L82 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 2 times [2021-05-06 02:31:37,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:37,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403946406] [2021-05-06 02:31:37,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:37,325 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:37,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203492441] [2021-05-06 02:31:37,325 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:37,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:37,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:37,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:31:37,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:37,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-06 02:31:37,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:37,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403946406] [2021-05-06 02:31:37,671 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:37,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203492441] [2021-05-06 02:31:37,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203492441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:37,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:37,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:31:37,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455668759] [2021-05-06 02:31:37,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:31:37,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:37,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:31:37,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:31:37,672 INFO L87 Difference]: Start difference. First operand 208 states and 289 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:31:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:37,917 INFO L93 Difference]: Finished difference Result 216 states and 296 transitions. [2021-05-06 02:31:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:31:37,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-06 02:31:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:37,920 INFO L225 Difference]: With dead ends: 216 [2021-05-06 02:31:37,920 INFO L226 Difference]: Without dead ends: 214 [2021-05-06 02:31:37,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:31:37,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-06 02:31:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2021-05-06 02:31:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 129 states have (on average 1.2790697674418605) internal successors, (165), 135 states have internal predecessors, (165), 65 states have call successors, (65), 18 states have call predecessors, (65), 17 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:31:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 292 transitions. [2021-05-06 02:31:37,945 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 292 transitions. Word has length 73 [2021-05-06 02:31:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:37,945 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 292 transitions. [2021-05-06 02:31:37,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:31:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 292 transitions. [2021-05-06 02:31:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 02:31:37,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:37,946 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:38,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:38,153 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:38,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:38,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 3 times [2021-05-06 02:31:38,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:38,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55293761] [2021-05-06 02:31:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:38,159 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:38,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203195246] [2021-05-06 02:31:38,160 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:38,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:31:38,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:38,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 02:31:38,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:38,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-06 02:31:38,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:38,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55293761] [2021-05-06 02:31:38,643 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:38,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203195246] [2021-05-06 02:31:38,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203195246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:38,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:38,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:31:38,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283459563] [2021-05-06 02:31:38,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:31:38,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:38,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:31:38,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:31:38,645 INFO L87 Difference]: Start difference. First operand 212 states and 292 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:31:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:39,039 INFO L93 Difference]: Finished difference Result 224 states and 302 transitions. [2021-05-06 02:31:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:31:39,040 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2021-05-06 02:31:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:39,041 INFO L225 Difference]: With dead ends: 224 [2021-05-06 02:31:39,042 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 02:31:39,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:31:39,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 02:31:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2021-05-06 02:31:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 135 states have (on average 1.2666666666666666) internal successors, (171), 141 states have internal predecessors, (171), 65 states have call successors, (65), 20 states have call predecessors, (65), 19 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:31:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 298 transitions. [2021-05-06 02:31:39,064 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 298 transitions. Word has length 78 [2021-05-06 02:31:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:39,064 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 298 transitions. [2021-05-06 02:31:39,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:31:39,064 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 298 transitions. [2021-05-06 02:31:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 02:31:39,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:39,065 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:39,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:31:39,286 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:39,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 2 times [2021-05-06 02:31:39,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:39,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945826146] [2021-05-06 02:31:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:39,302 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:39,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815964818] [2021-05-06 02:31:39,303 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:39,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:39,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:39,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 02:31:39,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:39,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-05-06 02:31:39,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:39,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945826146] [2021-05-06 02:31:39,582 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:39,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815964818] [2021-05-06 02:31:39,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815964818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:39,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:39,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:31:39,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039411515] [2021-05-06 02:31:39,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:31:39,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:31:39,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:31:39,584 INFO L87 Difference]: Start difference. First operand 220 states and 298 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:39,780 INFO L93 Difference]: Finished difference Result 285 states and 407 transitions. [2021-05-06 02:31:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:31:39,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2021-05-06 02:31:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:39,782 INFO L225 Difference]: With dead ends: 285 [2021-05-06 02:31:39,782 INFO L226 Difference]: Without dead ends: 283 [2021-05-06 02:31:39,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:31:39,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-06 02:31:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 253. [2021-05-06 02:31:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 150 states have (on average 1.2933333333333332) internal successors, (194), 157 states have internal predecessors, (194), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 02:31:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 355 transitions. [2021-05-06 02:31:39,806 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 355 transitions. Word has length 82 [2021-05-06 02:31:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:39,806 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 355 transitions. [2021-05-06 02:31:39,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 355 transitions. [2021-05-06 02:31:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 02:31:39,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:39,808 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:40,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:40,021 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:40,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:40,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 1 times [2021-05-06 02:31:40,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:40,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348601866] [2021-05-06 02:31:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:40,028 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:40,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475042720] [2021-05-06 02:31:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:40,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:31:40,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:40,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 02:31:40,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:40,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348601866] [2021-05-06 02:31:40,245 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:40,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475042720] [2021-05-06 02:31:40,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475042720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:40,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:40,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:31:40,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601751789] [2021-05-06 02:31:40,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:31:40,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:40,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:31:40,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:40,247 INFO L87 Difference]: Start difference. First operand 253 states and 355 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:40,349 INFO L93 Difference]: Finished difference Result 263 states and 365 transitions. [2021-05-06 02:31:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:31:40,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2021-05-06 02:31:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:40,351 INFO L225 Difference]: With dead ends: 263 [2021-05-06 02:31:40,352 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 02:31:40,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 02:31:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-05-06 02:31:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 160 states have internal predecessors, (197), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 02:31:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 358 transitions. [2021-05-06 02:31:40,373 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 358 transitions. Word has length 83 [2021-05-06 02:31:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:40,373 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 358 transitions. [2021-05-06 02:31:40,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 358 transitions. [2021-05-06 02:31:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 02:31:40,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:40,374 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:40,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:31:40,589 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:40,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:40,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2021-05-06 02:31:40,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:40,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476378608] [2021-05-06 02:31:40,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:40,594 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:40,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54249781] [2021-05-06 02:31:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 02:31:40,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:40,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-06 02:31:40,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:40,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476378608] [2021-05-06 02:31:40,882 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:40,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54249781] [2021-05-06 02:31:40,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54249781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:40,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:40,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:31:40,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264878173] [2021-05-06 02:31:40,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:31:40,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:40,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:31:40,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:40,885 INFO L87 Difference]: Start difference. First operand 256 states and 358 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:41,122 INFO L93 Difference]: Finished difference Result 289 states and 411 transitions. [2021-05-06 02:31:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:31:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2021-05-06 02:31:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:41,125 INFO L225 Difference]: With dead ends: 289 [2021-05-06 02:31:41,125 INFO L226 Difference]: Without dead ends: 286 [2021-05-06 02:31:41,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:31:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-06 02:31:41,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2021-05-06 02:31:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 168 states have (on average 1.3035714285714286) internal successors, (219), 176 states have internal predecessors, (219), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-06 02:31:41,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 406 transitions. [2021-05-06 02:31:41,174 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 406 transitions. Word has length 84 [2021-05-06 02:31:41,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:41,175 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 406 transitions. [2021-05-06 02:31:41,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:41,175 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 406 transitions. [2021-05-06 02:31:41,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:31:41,176 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:41,176 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:41,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 02:31:41,377 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:41,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:41,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 2 times [2021-05-06 02:31:41,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:41,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378018917] [2021-05-06 02:31:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:41,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:41,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208441006] [2021-05-06 02:31:41,384 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:41,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:41,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:41,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:31:41,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:41,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 02:31:41,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:41,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378018917] [2021-05-06 02:31:41,635 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:41,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208441006] [2021-05-06 02:31:41,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208441006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:41,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:41,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:31:41,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861909478] [2021-05-06 02:31:41,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:31:41,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:41,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:31:41,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:41,637 INFO L87 Difference]: Start difference. First operand 285 states and 406 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:41,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:41,763 INFO L93 Difference]: Finished difference Result 333 states and 453 transitions. [2021-05-06 02:31:41,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:31:41,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 87 [2021-05-06 02:31:41,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:41,765 INFO L225 Difference]: With dead ends: 333 [2021-05-06 02:31:41,766 INFO L226 Difference]: Without dead ends: 324 [2021-05-06 02:31:41,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:31:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-06 02:31:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2021-05-06 02:31:41,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 196 states have (on average 1.2653061224489797) internal successors, (248), 203 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 02:31:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 441 transitions. [2021-05-06 02:31:41,789 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 441 transitions. Word has length 87 [2021-05-06 02:31:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:41,790 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 441 transitions. [2021-05-06 02:31:41,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:41,790 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 441 transitions. [2021-05-06 02:31:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 02:31:41,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:41,791 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:42,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:31:42,001 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:42,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:42,001 INFO L82 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 1 times [2021-05-06 02:31:42,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:42,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080045295] [2021-05-06 02:31:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:42,008 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:42,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429725171] [2021-05-06 02:31:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:42,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:31:42,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:42,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 02:31:42,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080045295] [2021-05-06 02:31:42,228 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429725171] [2021-05-06 02:31:42,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429725171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:42,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:42,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:31:42,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574103540] [2021-05-06 02:31:42,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:31:42,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:42,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:31:42,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:42,229 INFO L87 Difference]: Start difference. First operand 323 states and 441 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:42,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:42,380 INFO L93 Difference]: Finished difference Result 452 states and 648 transitions. [2021-05-06 02:31:42,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:31:42,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2021-05-06 02:31:42,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:42,382 INFO L225 Difference]: With dead ends: 452 [2021-05-06 02:31:42,382 INFO L226 Difference]: Without dead ends: 325 [2021-05-06 02:31:42,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:31:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-06 02:31:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-05-06 02:31:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 198 states have (on average 1.2525252525252526) internal successors, (248), 205 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 02:31:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 441 transitions. [2021-05-06 02:31:42,412 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 441 transitions. Word has length 89 [2021-05-06 02:31:42,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:42,412 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 441 transitions. [2021-05-06 02:31:42,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 441 transitions. [2021-05-06 02:31:42,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 02:31:42,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:42,413 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:42,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 02:31:42,637 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:42,637 INFO L82 PathProgramCache]: Analyzing trace with hash 325787368, now seen corresponding path program 2 times [2021-05-06 02:31:42,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:42,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863016168] [2021-05-06 02:31:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:42,645 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:42,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305137711] [2021-05-06 02:31:42,645 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:42,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:42,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:42,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:31:42,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:42,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-05-06 02:31:42,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:42,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863016168] [2021-05-06 02:31:42,845 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:42,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305137711] [2021-05-06 02:31:42,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305137711] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:31:42,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:31:42,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:31:42,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905379054] [2021-05-06 02:31:42,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:31:42,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:42,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:31:42,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:31:42,846 INFO L87 Difference]: Start difference. First operand 325 states and 441 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:31:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:42,937 INFO L93 Difference]: Finished difference Result 524 states and 770 transitions. [2021-05-06 02:31:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:31:42,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2021-05-06 02:31:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:42,940 INFO L225 Difference]: With dead ends: 524 [2021-05-06 02:31:42,940 INFO L226 Difference]: Without dead ends: 427 [2021-05-06 02:31:42,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-06 02:31:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 361. [2021-05-06 02:31:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 222 states have (on average 1.2657657657657657) internal successors, (281), 229 states have internal predecessors, (281), 110 states have call successors, (110), 29 states have call predecessors, (110), 28 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 02:31:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 498 transitions. [2021-05-06 02:31:42,969 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 498 transitions. Word has length 93 [2021-05-06 02:31:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:42,969 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 498 transitions. [2021-05-06 02:31:42,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:31:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 498 transitions. [2021-05-06 02:31:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 02:31:42,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:42,971 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:43,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:31:43,195 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:43,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:43,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2021-05-06 02:31:43,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:43,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613428594] [2021-05-06 02:31:43,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:43,208 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:43,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662216660] [2021-05-06 02:31:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 02:31:43,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:43,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 44 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-05-06 02:31:43,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:43,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613428594] [2021-05-06 02:31:43,799 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:43,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662216660] [2021-05-06 02:31:43,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662216660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:43,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:43,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:31:43,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406488947] [2021-05-06 02:31:43,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:31:43,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:43,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:31:43,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:31:43,800 INFO L87 Difference]: Start difference. First operand 361 states and 498 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:31:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:44,353 INFO L93 Difference]: Finished difference Result 369 states and 505 transitions. [2021-05-06 02:31:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:31:44,353 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2021-05-06 02:31:44,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:44,355 INFO L225 Difference]: With dead ends: 369 [2021-05-06 02:31:44,355 INFO L226 Difference]: Without dead ends: 367 [2021-05-06 02:31:44,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 319.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:31:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-06 02:31:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2021-05-06 02:31:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 225 states have (on average 1.2622222222222221) internal successors, (284), 232 states have internal predecessors, (284), 110 states have call successors, (110), 30 states have call predecessors, (110), 29 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 02:31:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 501 transitions. [2021-05-06 02:31:44,382 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 501 transitions. Word has length 101 [2021-05-06 02:31:44,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:44,382 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 501 transitions. [2021-05-06 02:31:44,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:31:44,383 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 501 transitions. [2021-05-06 02:31:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 02:31:44,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:44,384 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:44,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:44,609 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:44,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:44,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 3 times [2021-05-06 02:31:44,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:44,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741700445] [2021-05-06 02:31:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:44,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:44,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516949166] [2021-05-06 02:31:44,616 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:44,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:31:44,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:44,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:31:44,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:44,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:44,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:44,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-05-06 02:31:44,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:44,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741700445] [2021-05-06 02:31:44,877 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:44,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516949166] [2021-05-06 02:31:44,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516949166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:44,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:44,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:31:44,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626155233] [2021-05-06 02:31:44,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:31:44,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:44,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:31:44,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:44,879 INFO L87 Difference]: Start difference. First operand 365 states and 501 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:31:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:44,969 INFO L93 Difference]: Finished difference Result 371 states and 506 transitions. [2021-05-06 02:31:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:31:44,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2021-05-06 02:31:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:44,972 INFO L225 Difference]: With dead ends: 371 [2021-05-06 02:31:44,972 INFO L226 Difference]: Without dead ends: 369 [2021-05-06 02:31:44,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:44,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-06 02:31:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2021-05-06 02:31:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 228 states have (on average 1.2587719298245614) internal successors, (287), 235 states have internal predecessors, (287), 110 states have call successors, (110), 31 states have call predecessors, (110), 30 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 02:31:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 504 transitions. [2021-05-06 02:31:45,001 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 504 transitions. Word has length 105 [2021-05-06 02:31:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:45,002 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 504 transitions. [2021-05-06 02:31:45,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:31:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 504 transitions. [2021-05-06 02:31:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 02:31:45,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:45,003 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 02:31:45,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-06 02:31:45,227 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:45,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:45,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 2 times [2021-05-06 02:31:45,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:45,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7891713] [2021-05-06 02:31:45,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:45,238 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:45,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802129880] [2021-05-06 02:31:45,239 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:45,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:45,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:45,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:31:45,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:45,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:45,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:45,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:45,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:45,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:45,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:45,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:45,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:45,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-05-06 02:31:45,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:45,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7891713] [2021-05-06 02:31:45,628 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:45,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802129880] [2021-05-06 02:31:45,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802129880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:45,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:45,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:31:45,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739434669] [2021-05-06 02:31:45,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:31:45,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:45,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:31:45,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:31:45,632 INFO L87 Difference]: Start difference. First operand 369 states and 504 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 02:31:46,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:46,092 INFO L93 Difference]: Finished difference Result 403 states and 557 transitions. [2021-05-06 02:31:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:31:46,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 107 [2021-05-06 02:31:46,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:46,094 INFO L225 Difference]: With dead ends: 403 [2021-05-06 02:31:46,094 INFO L226 Difference]: Without dead ends: 400 [2021-05-06 02:31:46,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:31:46,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-06 02:31:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2021-05-06 02:31:46,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 243 states have (on average 1.2674897119341564) internal successors, (308), 251 states have internal predecessors, (308), 123 states have call successors, (123), 32 states have call predecessors, (123), 31 states have return successors, (120), 114 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-06 02:31:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 551 transitions. [2021-05-06 02:31:46,126 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 551 transitions. Word has length 107 [2021-05-06 02:31:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:46,127 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 551 transitions. [2021-05-06 02:31:46,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 02:31:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 551 transitions. [2021-05-06 02:31:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 02:31:46,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:46,128 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:46,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:46,345 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:46,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:46,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 2 times [2021-05-06 02:31:46,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:46,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723359970] [2021-05-06 02:31:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:46,351 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:46,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343134720] [2021-05-06 02:31:46,351 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:46,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:46,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 02:31:46,439 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:31:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 02:31:46,484 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:31:46,613 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 02:31:46,614 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 02:31:46,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 02:31:46,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:31:46 BoogieIcfgContainer [2021-05-06 02:31:46,894 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:31:46,895 INFO L168 Benchmark]: Toolchain (without parser) took 18227.90 ms. Allocated memory was 192.9 MB in the beginning and 342.9 MB in the end (delta: 149.9 MB). Free memory was 158.1 MB in the beginning and 193.4 MB in the end (delta: -35.2 MB). Peak memory consumption was 115.6 MB. Max. memory is 8.0 GB. [2021-05-06 02:31:46,895 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 192.9 MB. Free memory is still 174.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:31:46,895 INFO L168 Benchmark]: CACSL2BoogieTranslator took 181.21 ms. Allocated memory is still 192.9 MB. Free memory was 157.9 MB in the beginning and 147.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 02:31:46,895 INFO L168 Benchmark]: Boogie Preprocessor took 67.25 ms. Allocated memory is still 192.9 MB. Free memory was 147.1 MB in the beginning and 175.7 MB in the end (delta: -28.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:31:46,895 INFO L168 Benchmark]: RCFGBuilder took 307.51 ms. Allocated memory is still 192.9 MB. Free memory was 175.7 MB in the beginning and 157.3 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-05-06 02:31:46,895 INFO L168 Benchmark]: TraceAbstraction took 17667.68 ms. Allocated memory was 192.9 MB in the beginning and 342.9 MB in the end (delta: 149.9 MB). Free memory was 156.8 MB in the beginning and 193.4 MB in the end (delta: -36.6 MB). Peak memory consumption was 115.0 MB. Max. memory is 8.0 GB. [2021-05-06 02:31:46,896 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 192.9 MB. Free memory is still 174.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 181.21 ms. Allocated memory is still 192.9 MB. Free memory was 157.9 MB in the beginning and 147.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.25 ms. Allocated memory is still 192.9 MB. Free memory was 147.1 MB in the beginning and 175.7 MB in the end (delta: -28.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 307.51 ms. Allocated memory is still 192.9 MB. Free memory was 175.7 MB in the beginning and 157.3 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17667.68 ms. Allocated memory was 192.9 MB in the beginning and 342.9 MB in the end (delta: 149.9 MB). Free memory was 156.8 MB in the beginning and 193.4 MB in the end (delta: -36.6 MB). Peak memory consumption was 115.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=13, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=3, y=4] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=3, y=4] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y VAL [\old(counter)=0, a=3, b=4, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L37] CALL assume_abort_if_not(xy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L37] RET assume_abort_if_not(xy < 2147483647) VAL [\old(counter)=0, a=3, b=4, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L38] CALL assume_abort_if_not(yy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L38] RET assume_abort_if_not(yy < 2147483647) VAL [\old(counter)=0, a=3, b=4, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L40] EXPR counter++ VAL [\old(counter)=0, a=3, b=4, c=0, counter=1, counter++=0, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=3, b=4, c=3, counter=1, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L46] EXPR counter++ VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=4, b=3, c=3, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L40] EXPR counter++ VAL [\old(counter)=0, a=4, b=3, c=3, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=4, b=3, c=4, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L46] EXPR counter++ VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [\old(counter)=0, a=4, b=3, c=1, counter=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L46] EXPR counter++ VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, counter++=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=3, b=1, c=1, counter=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=3, xy=12, y=4, yy=16] [L40] EXPR counter++ VAL [\old(counter)=0, a=3, b=1, c=1, counter=6, counter++=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=3, xy=12, y=4, yy=16] [L40] COND FALSE !(counter++<5) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17531.9ms, OverallIterations: 26, TraceHistogramMax: 13, EmptinessCheckTime: 33.6ms, AutomataDifference: 4428.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1188 SDtfs, 695 SDslu, 4391 SDs, 0 SdLazy, 3100 SolverSat, 509 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2597.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1693 GetRequests, 1475 SyntacticMatches, 5 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1800.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=398occurred in iteration=25, InterpolantAutomatonStates: 214, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 489.8ms AutomataMinimizationTime, 25 MinimizatonAttempts, 174 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 272.5ms SsaConstructionTime, 850.7ms SatisfiabilityAnalysisTime, 4712.1ms InterpolantComputationTime, 1780 NumberOfCodeBlocks, 1730 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1645 ConstructedInterpolants, 0 QuantifiedInterpolants, 6787 SizeOfPredicates, 98 NumberOfNonLiveVariables, 5712 ConjunctsInSsa, 460 ConjunctsInUnsatCore, 25 InterpolantComputations, 4 PerfectInterpolantSequences, 2348/2813 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...