/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/egcd3-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:37:37,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:37:37,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:37:37,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:37:37,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:37:37,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:37:37,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:37:37,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:37:37,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:37:37,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:37:37,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:37:37,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:37:37,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:37:37,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:37:37,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:37:37,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:37:37,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:37:37,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:37:37,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:37:37,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:37:37,457 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 02:37:37,485 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:37:37,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:37:37,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:37:37,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:37:37,488 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:37:37,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:37:37,488 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:37:37,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:37:37,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:37:37,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:37:37,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:37:37,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:37:37,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:37:37,490 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:37:37,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:37:37,490 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:37:37,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:37:37,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:37:37,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:37:37,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:37:37,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:37:37,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:37:37,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:37:37,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:37:37,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:37:37,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:37:37,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:37:37,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:37:37,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:37:37,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:37:37,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:37:37,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:37:37,770 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:37:37,771 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:37:37,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-05-06 02:37:37,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711dfeb69/673cff25985c4e29b9d6269173e68570/FLAGafecbd67b [2021-05-06 02:37:38,206 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:37:38,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-05-06 02:37:38,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711dfeb69/673cff25985c4e29b9d6269173e68570/FLAGafecbd67b [2021-05-06 02:37:38,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711dfeb69/673cff25985c4e29b9d6269173e68570 [2021-05-06 02:37:38,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:37:38,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:37:38,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:37:38,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:37:38,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:37:38,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:37:38" (1/1) ... [2021-05-06 02:37:38,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5737923b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:38, skipping insertion in model container [2021-05-06 02:37:38,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:37:38" (1/1) ... [2021-05-06 02:37:38,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:37:38,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:37:38,368 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/egcd3-ll_valuebound100.c[490,503] [2021-05-06 02:37:38,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:37:38,413 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:37:38,435 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/egcd3-ll_valuebound100.c[490,503] [2021-05-06 02:37:38,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:37:38,469 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:37:38,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:38 WrapperNode [2021-05-06 02:37:38,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:37:38,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:37:38,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:37:38,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:37:38,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:38" (1/1) ... [2021-05-06 02:37:38,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:38" (1/1) ... [2021-05-06 02:37:38,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:38" (1/1) ... [2021-05-06 02:37:38,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:38" (1/1) ... [2021-05-06 02:37:38,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:38" (1/1) ... [2021-05-06 02:37:38,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:38" (1/1) ... [2021-05-06 02:37:38,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:38" (1/1) ... [2021-05-06 02:37:38,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:37:38,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:37:38,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:37:38,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:37:38,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:38" (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 02:37:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:37:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:37:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:37:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:37:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:37:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:37:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:37:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:37:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:37:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:37:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:37:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:37:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:37:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:37:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:37:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:37:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:37:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:37:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:37:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:37:38,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:37:38,807 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 02:37:38,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:37:38 BoogieIcfgContainer [2021-05-06 02:37:38,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:37:38,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:37:38,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:37:38,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:37:38,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:37:38" (1/3) ... [2021-05-06 02:37:38,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce31981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:37:38, skipping insertion in model container [2021-05-06 02:37:38,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:38" (2/3) ... [2021-05-06 02:37:38,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce31981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:37:38, skipping insertion in model container [2021-05-06 02:37:38,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:37:38" (3/3) ... [2021-05-06 02:37:38,813 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2021-05-06 02:37:38,816 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:37:38,818 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:37:38,838 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:37:38,852 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:37:38,852 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:37:38,862 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:37:38,862 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:37:38,862 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:37:38,862 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:37:38,862 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:37:38,862 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:37:38,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:37:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:37:38,879 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:38,879 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 02:37:38,879 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:38,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:38,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2021-05-06 02:37:38,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:38,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247952501] [2021-05-06 02:37:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:39,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:37:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:39,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:37:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:39,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:37:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:39,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:37:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:39,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:37:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:39,114 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 02:37:39,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:39,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247952501] [2021-05-06 02:37:39,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247952501] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:37:39,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:37:39,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:37:39,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933863037] [2021-05-06 02:37:39,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:37:39,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:39,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:37:39,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:37:39,127 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 02:37:39,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:39,227 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2021-05-06 02:37:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:37:39,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 33 [2021-05-06 02:37:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:39,233 INFO L225 Difference]: With dead ends: 73 [2021-05-06 02:37:39,233 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:37:39,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:37:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:37:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:37:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:37:39,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 02:37:39,280 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-06 02:37:39,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:39,280 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 02:37:39,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 02:37:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 02:37:39,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:37:39,282 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:39,282 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 02:37:39,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:37:39,282 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:39,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:39,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2021-05-06 02:37:39,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:39,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535071496] [2021-05-06 02:37:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:39,297 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:39,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779387454] [2021-05-06 02:37:39,297 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 02:37:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:39,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:37:39,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:39,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:37:39,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:39,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535071496] [2021-05-06 02:37:39,505 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:39,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779387454] [2021-05-06 02:37:39,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779387454] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:37:39,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:37:39,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 02:37:39,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750917053] [2021-05-06 02:37:39,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:37:39,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:39,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:37:39,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:37:39,507 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:37:39,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:39,575 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-06 02:37:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:37:39,575 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-06 02:37:39,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:39,576 INFO L225 Difference]: With dead ends: 54 [2021-05-06 02:37:39,576 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 02:37:39,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:37:39,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 02:37:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-06 02:37:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:37:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 02:37:39,586 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-06 02:37:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:39,587 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 02:37:39,587 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:37:39,587 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 02:37:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:37:39,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:39,588 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, 1] [2021-05-06 02:37:39,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:37:39,805 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:39,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:39,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2021-05-06 02:37:39,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:39,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663368850] [2021-05-06 02:37:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:39,818 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:39,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564078249] [2021-05-06 02:37:39,818 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 02:37:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:39,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:37:39,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:39,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:39,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:39,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:39,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:39,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:39,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:40,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:37:40,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:40,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663368850] [2021-05-06 02:37:40,029 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:40,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564078249] [2021-05-06 02:37:40,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564078249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:40,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:40,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:37:40,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437595193] [2021-05-06 02:37:40,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:37:40,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:40,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:37:40,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:37:40,031 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:37:40,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:40,148 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-05-06 02:37:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:37:40,149 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 02:37:40,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:40,152 INFO L225 Difference]: With dead ends: 53 [2021-05-06 02:37:40,152 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 02:37:40,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:37:40,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 02:37:40,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 02:37:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:37:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 02:37:40,180 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-06 02:37:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:40,180 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 02:37:40,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:37:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 02:37:40,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:37:40,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:40,181 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 02:37:40,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:40,382 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:40,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:40,382 INFO L82 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2021-05-06 02:37:40,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:40,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106989021] [2021-05-06 02:37:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:40,394 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:40,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302549937] [2021-05-06 02:37:40,395 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 02:37:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:40,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:37:40,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:40,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:40,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:40,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:40,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:40,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:37:40,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:40,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106989021] [2021-05-06 02:37:40,612 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:40,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302549937] [2021-05-06 02:37:40,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302549937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:40,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:40,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:37:40,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155697490] [2021-05-06 02:37:40,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:37:40,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:40,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:37:40,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:37:40,614 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 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 02:37:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:40,774 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2021-05-06 02:37:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:37:40,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 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 39 [2021-05-06 02:37:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:40,777 INFO L225 Difference]: With dead ends: 103 [2021-05-06 02:37:40,777 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 02:37:40,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:37:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 02:37:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-06 02:37:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:37:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-06 02:37:40,788 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-06 02:37:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:40,788 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-06 02:37:40,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 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 02:37:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-06 02:37:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:37:40,789 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:40,789 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, 1] [2021-05-06 02:37:41,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:41,001 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:41,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:41,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2021-05-06 02:37:41,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:41,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744393396] [2021-05-06 02:37:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:41,016 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:41,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60526481] [2021-05-06 02:37:41,016 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 02:37:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:41,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:37:41,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:41,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:37:41,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:41,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744393396] [2021-05-06 02:37:41,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:41,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60526481] [2021-05-06 02:37:41,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60526481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:41,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:41,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:37:41,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898296057] [2021-05-06 02:37:41,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:37:41,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:41,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:37:41,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:37:41,288 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:37:41,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:41,516 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2021-05-06 02:37:41,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:37:41,517 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 02:37:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:41,517 INFO L225 Difference]: With dead ends: 86 [2021-05-06 02:37:41,517 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 02:37:41,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:37:41,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 02:37:41,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-06 02:37:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:37:41,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-06 02:37:41,527 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-06 02:37:41,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:41,527 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-06 02:37:41,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:37:41,527 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-06 02:37:41,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:37:41,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:41,528 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:37:41,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:41,741 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:41,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:41,741 INFO L82 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2021-05-06 02:37:41,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:41,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886846224] [2021-05-06 02:37:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:41,754 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:41,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988692740] [2021-05-06 02:37:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:37:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:41,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 02:37:41,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:41,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:37:41,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:41,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886846224] [2021-05-06 02:37:41,990 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:41,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988692740] [2021-05-06 02:37:41,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988692740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:41,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:41,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:37:41,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628396187] [2021-05-06 02:37:41,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:37:41,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:41,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:37:41,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:37:41,991 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:37:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:42,239 INFO L93 Difference]: Finished difference Result 105 states and 139 transitions. [2021-05-06 02:37:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:37:42,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-06 02:37:42,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:42,240 INFO L225 Difference]: With dead ends: 105 [2021-05-06 02:37:42,240 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 02:37:42,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:37:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 02:37:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2021-05-06 02:37:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:37:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-05-06 02:37:42,250 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2021-05-06 02:37:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:42,250 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-05-06 02:37:42,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:37:42,251 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-05-06 02:37:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:37:42,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:42,251 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, 1] [2021-05-06 02:37:42,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:37:42,457 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:42,457 INFO L82 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2021-05-06 02:37:42,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:42,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643325739] [2021-05-06 02:37:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:42,466 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:42,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673610696] [2021-05-06 02:37:42,466 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 02:37:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:42,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:37:42,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:42,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:42,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:42,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:42,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:42,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:42,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:42,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:42,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:37:42,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:42,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643325739] [2021-05-06 02:37:42,622 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:42,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673610696] [2021-05-06 02:37:42,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673610696] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:37:42,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:37:42,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 02:37:42,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799044835] [2021-05-06 02:37:42,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:37:42,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:42,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:37:42,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:37:42,626 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:37:42,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:42,752 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2021-05-06 02:37:42,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:37:42,753 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 02:37:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:42,754 INFO L225 Difference]: With dead ends: 107 [2021-05-06 02:37:42,754 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 02:37:42,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:37:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 02:37:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 02:37:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 69 states have internal predecessors, (84), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 02:37:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2021-05-06 02:37:42,764 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 47 [2021-05-06 02:37:42,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:42,765 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2021-05-06 02:37:42,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:37:42,765 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2021-05-06 02:37:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:37:42,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:42,766 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:37:42,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:42,983 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:42,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2021-05-06 02:37:42,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:42,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389672232] [2021-05-06 02:37:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:42,997 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:42,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509178469] [2021-05-06 02:37:42,997 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 02:37:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:43,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:37:43,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:43,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:37:43,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:43,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389672232] [2021-05-06 02:37:43,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:43,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509178469] [2021-05-06 02:37:43,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509178469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:43,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:43,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:37:43,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435428349] [2021-05-06 02:37:43,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:37:43,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:43,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:37:43,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:37:43,167 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:37:43,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:43,266 INFO L93 Difference]: Finished difference Result 113 states and 145 transitions. [2021-05-06 02:37:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:37:43,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-05-06 02:37:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:43,267 INFO L225 Difference]: With dead ends: 113 [2021-05-06 02:37:43,267 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 02:37:43,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:37:43,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 02:37:43,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-05-06 02:37:43,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 02:37:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2021-05-06 02:37:43,276 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 47 [2021-05-06 02:37:43,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:43,276 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2021-05-06 02:37:43,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:37:43,277 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2021-05-06 02:37:43,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:37:43,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:43,277 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2021-05-06 02:37:43,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:43,493 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:43,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 2 times [2021-05-06 02:37:43,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:43,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953876385] [2021-05-06 02:37:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:43,502 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:43,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404204847] [2021-05-06 02:37:43,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:43,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:43,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:43,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:37:43,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:43,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:43,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:43,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:43,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:37:43,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:43,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953876385] [2021-05-06 02:37:43,616 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:43,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404204847] [2021-05-06 02:37:43,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404204847] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:37:43,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:37:43,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:37:43,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736311034] [2021-05-06 02:37:43,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:37:43,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:43,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:37:43,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:37:43,620 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:37:43,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:43,681 INFO L93 Difference]: Finished difference Result 148 states and 199 transitions. [2021-05-06 02:37:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:37:43,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-06 02:37:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:43,682 INFO L225 Difference]: With dead ends: 148 [2021-05-06 02:37:43,682 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 02:37:43,683 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:37:43,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 02:37:43,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-05-06 02:37:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:37:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-05-06 02:37:43,691 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 47 [2021-05-06 02:37:43,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:43,691 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-05-06 02:37:43,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:37:43,691 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-05-06 02:37:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:37:43,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:43,692 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, 1] [2021-05-06 02:37:43,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:37:43,909 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:43,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:43,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2021-05-06 02:37:43,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:43,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507110861] [2021-05-06 02:37:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:43,917 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:43,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420247986] [2021-05-06 02:37:43,917 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 02:37:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:43,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:37:43,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:44,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 02:37:44,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:44,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507110861] [2021-05-06 02:37:44,061 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:44,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420247986] [2021-05-06 02:37:44,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420247986] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:37:44,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:37:44,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:37:44,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266819658] [2021-05-06 02:37:44,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:37:44,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:37:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:37:44,062 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:37:44,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:44,106 INFO L93 Difference]: Finished difference Result 130 states and 174 transitions. [2021-05-06 02:37:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:37:44,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-06 02:37:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:44,107 INFO L225 Difference]: With dead ends: 130 [2021-05-06 02:37:44,107 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 02:37:44,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:37:44,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 02:37:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2021-05-06 02:37:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 70 states have internal predecessors, (75), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 02:37:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2021-05-06 02:37:44,120 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 52 [2021-05-06 02:37:44,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:44,120 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2021-05-06 02:37:44,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:37:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2021-05-06 02:37:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:37:44,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:44,121 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1] [2021-05-06 02:37:44,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:44,337 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:44,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1926690588, now seen corresponding path program 1 times [2021-05-06 02:37:44,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:44,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392170706] [2021-05-06 02:37:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:44,345 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:44,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559940007] [2021-05-06 02:37:44,345 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 02:37:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:44,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:37:44,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:44,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:37:44,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:44,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392170706] [2021-05-06 02:37:44,510 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:44,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559940007] [2021-05-06 02:37:44,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559940007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:44,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:44,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:37:44,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497363996] [2021-05-06 02:37:44,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:37:44,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:44,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:37:44,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:37:44,512 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:37:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:44,700 INFO L93 Difference]: Finished difference Result 166 states and 231 transitions. [2021-05-06 02:37:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:37:44,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2021-05-06 02:37:44,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:44,705 INFO L225 Difference]: With dead ends: 166 [2021-05-06 02:37:44,705 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 02:37:44,706 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:37:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 02:37:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 92. [2021-05-06 02:37:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 02:37:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2021-05-06 02:37:44,723 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 52 [2021-05-06 02:37:44,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:44,724 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2021-05-06 02:37:44,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:37:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2021-05-06 02:37:44,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 02:37:44,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:44,725 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, 1, 1] [2021-05-06 02:37:44,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:44,945 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:44,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:44,945 INFO L82 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2021-05-06 02:37:44,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:44,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847546450] [2021-05-06 02:37:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:44,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:44,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563107094] [2021-05-06 02:37:44,953 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 02:37:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:45,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 02:37:45,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:45,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 02:37:45,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:45,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847546450] [2021-05-06 02:37:45,260 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:45,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563107094] [2021-05-06 02:37:45,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563107094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:45,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:45,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:37:45,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646648891] [2021-05-06 02:37:45,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:37:45,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:45,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:37:45,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:37:45,261 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 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 02:37:45,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:45,571 INFO L93 Difference]: Finished difference Result 178 states and 243 transitions. [2021-05-06 02:37:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:37:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 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 64 [2021-05-06 02:37:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:45,573 INFO L225 Difference]: With dead ends: 178 [2021-05-06 02:37:45,573 INFO L226 Difference]: Without dead ends: 175 [2021-05-06 02:37:45,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:37:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-06 02:37:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-05-06 02:37:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.168421052631579) internal successors, (111), 102 states have internal predecessors, (111), 63 states have call successors, (63), 13 states have call predecessors, (63), 12 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 02:37:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 235 transitions. [2021-05-06 02:37:45,602 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 235 transitions. Word has length 64 [2021-05-06 02:37:45,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:45,602 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 235 transitions. [2021-05-06 02:37:45,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 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 02:37:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 235 transitions. [2021-05-06 02:37:45,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:37:45,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:45,603 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:37:45,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:37:45,813 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:45,813 INFO L82 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 2 times [2021-05-06 02:37:45,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:45,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501164956] [2021-05-06 02:37:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:45,820 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:45,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185767057] [2021-05-06 02:37:45,820 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 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 02:37:45,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:45,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:45,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 02:37:45,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:45,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:37:45,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:45,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501164956] [2021-05-06 02:37:45,986 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:45,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185767057] [2021-05-06 02:37:45,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185767057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:45,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:45,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:37:45,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997305245] [2021-05-06 02:37:45,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:37:45,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:45,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:37:45,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:37:45,987 INFO L87 Difference]: Start difference. First operand 171 states and 235 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 02:37:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:46,220 INFO L93 Difference]: Finished difference Result 288 states and 424 transitions. [2021-05-06 02:37:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:37:46,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 69 [2021-05-06 02:37:46,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:46,223 INFO L225 Difference]: With dead ends: 288 [2021-05-06 02:37:46,223 INFO L226 Difference]: Without dead ends: 281 [2021-05-06 02:37:46,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:37:46,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-06 02:37:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 196. [2021-05-06 02:37:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 118 states have internal predecessors, (134), 71 states have call successors, (71), 13 states have call predecessors, (71), 12 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 02:37:46,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 274 transitions. [2021-05-06 02:37:46,246 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 274 transitions. Word has length 69 [2021-05-06 02:37:46,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:46,246 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 274 transitions. [2021-05-06 02:37:46,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 02:37:46,246 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 274 transitions. [2021-05-06 02:37:46,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 02:37:46,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:46,247 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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 02:37:46,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:37:46,461 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:46,461 INFO L82 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2021-05-06 02:37:46,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:46,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126796102] [2021-05-06 02:37:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:46,468 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:46,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240952714] [2021-05-06 02:37:46,468 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 02:37:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:46,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 02:37:46,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:46,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 02:37:46,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:46,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126796102] [2021-05-06 02:37:46,672 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:46,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240952714] [2021-05-06 02:37:46,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240952714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:46,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:46,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:37:46,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549036925] [2021-05-06 02:37:46,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:37:46,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:46,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:37:46,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:37:46,673 INFO L87 Difference]: Start difference. First operand 196 states and 274 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:37:46,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:46,849 INFO L93 Difference]: Finished difference Result 235 states and 330 transitions. [2021-05-06 02:37:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:37:46,849 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), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-05-06 02:37:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:46,850 INFO L225 Difference]: With dead ends: 235 [2021-05-06 02:37:46,850 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 02:37:46,851 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:37:46,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 02:37:46,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2021-05-06 02:37:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 123 states have (on average 1.1951219512195121) internal successors, (147), 130 states have internal predecessors, (147), 83 states have call successors, (83), 15 states have call predecessors, (83), 14 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 02:37:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 311 transitions. [2021-05-06 02:37:46,874 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 311 transitions. Word has length 74 [2021-05-06 02:37:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:46,874 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 311 transitions. [2021-05-06 02:37:46,874 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), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:37:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 311 transitions. [2021-05-06 02:37:46,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 02:37:46,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:46,875 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1] [2021-05-06 02:37:47,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:37:47,089 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2021-05-06 02:37:47,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:47,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329844527] [2021-05-06 02:37:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:47,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:47,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434000379] [2021-05-06 02:37:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:37:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:47,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:37:47,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:47,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-06 02:37:47,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:47,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329844527] [2021-05-06 02:37:47,250 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:47,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434000379] [2021-05-06 02:37:47,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434000379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:47,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:47,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:37:47,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147146423] [2021-05-06 02:37:47,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:37:47,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:47,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:37:47,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:37:47,251 INFO L87 Difference]: Start difference. First operand 221 states and 311 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:37:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:47,390 INFO L93 Difference]: Finished difference Result 235 states and 322 transitions. [2021-05-06 02:37:47,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:37:47,391 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), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2021-05-06 02:37:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:47,392 INFO L225 Difference]: With dead ends: 235 [2021-05-06 02:37:47,392 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 02:37:47,392 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:37:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 02:37:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-05-06 02:37:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 139 states have internal predecessors, (156), 83 states have call successors, (83), 18 states have call predecessors, (83), 17 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 02:37:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 320 transitions. [2021-05-06 02:37:47,431 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 320 transitions. Word has length 72 [2021-05-06 02:37:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:47,431 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 320 transitions. [2021-05-06 02:37:47,431 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), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:37:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 320 transitions. [2021-05-06 02:37:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 02:37:47,432 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:47,432 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 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, 1] [2021-05-06 02:37:47,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:47,645 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:47,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:47,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 2 times [2021-05-06 02:37:47,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:47,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679899093] [2021-05-06 02:37:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:47,652 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:47,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655463211] [2021-05-06 02:37:47,652 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 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 02:37:47,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:47,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:47,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 02:37:47,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:47,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 02:37:47,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:47,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679899093] [2021-05-06 02:37:47,799 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:47,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655463211] [2021-05-06 02:37:47,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655463211] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:37:47,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:37:47,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:37:47,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173698757] [2021-05-06 02:37:47,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:37:47,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:47,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:37:47,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:37:47,800 INFO L87 Difference]: Start difference. First operand 233 states and 320 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:37:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:47,890 INFO L93 Difference]: Finished difference Result 375 states and 510 transitions. [2021-05-06 02:37:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:37:47,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-06 02:37:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:47,892 INFO L225 Difference]: With dead ends: 375 [2021-05-06 02:37:47,892 INFO L226 Difference]: Without dead ends: 232 [2021-05-06 02:37:47,893 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:37:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-06 02:37:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 216. [2021-05-06 02:37:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 127 states have (on average 1.1653543307086613) internal successors, (148), 130 states have internal predecessors, (148), 71 states have call successors, (71), 18 states have call predecessors, (71), 17 states have return successors, (69), 67 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 02:37:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 288 transitions. [2021-05-06 02:37:47,916 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 288 transitions. Word has length 77 [2021-05-06 02:37:47,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:47,916 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 288 transitions. [2021-05-06 02:37:47,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:37:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 288 transitions. [2021-05-06 02:37:47,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 02:37:47,917 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:47,917 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 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, 1] [2021-05-06 02:37:48,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:37:48,133 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:48,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:48,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2139677040, now seen corresponding path program 3 times [2021-05-06 02:37:48,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:48,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402871542] [2021-05-06 02:37:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:48,140 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:48,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250343881] [2021-05-06 02:37:48,140 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 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 02:37:48,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 02:37:48,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:48,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 02:37:48,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:48,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:37:48,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:48,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402871542] [2021-05-06 02:37:48,313 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:48,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250343881] [2021-05-06 02:37:48,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250343881] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:37:48,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:37:48,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:37:48,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283368517] [2021-05-06 02:37:48,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:37:48,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:48,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:37:48,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:37:48,314 INFO L87 Difference]: Start difference. First operand 216 states and 288 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 02:37:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:48,381 INFO L93 Difference]: Finished difference Result 238 states and 319 transitions. [2021-05-06 02:37:48,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:37:48,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-06 02:37:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:48,383 INFO L225 Difference]: With dead ends: 238 [2021-05-06 02:37:48,383 INFO L226 Difference]: Without dead ends: 236 [2021-05-06 02:37:48,383 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:37:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-06 02:37:48,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2021-05-06 02:37:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 134 states have (on average 1.171641791044776) internal successors, (157), 137 states have internal predecessors, (157), 79 states have call successors, (79), 19 states have call predecessors, (79), 18 states have return successors, (77), 75 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-06 02:37:48,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 313 transitions. [2021-05-06 02:37:48,409 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 313 transitions. Word has length 77 [2021-05-06 02:37:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:48,409 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 313 transitions. [2021-05-06 02:37:48,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 02:37:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 313 transitions. [2021-05-06 02:37:48,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 02:37:48,410 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:48,410 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 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, 1] [2021-05-06 02:37:48,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:37:48,625 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 4 times [2021-05-06 02:37:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:48,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459150481] [2021-05-06 02:37:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:48,631 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:48,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829413073] [2021-05-06 02:37:48,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 02:37:48,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:37:48,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:48,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-06 02:37:48,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:48,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 02:37:49,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:49,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459150481] [2021-05-06 02:37:49,009 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:49,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829413073] [2021-05-06 02:37:49,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829413073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:49,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:49,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:37:49,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801284072] [2021-05-06 02:37:49,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:37:49,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:49,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:37:49,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:37:49,012 INFO L87 Difference]: Start difference. First operand 232 states and 313 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:37:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:49,430 INFO L93 Difference]: Finished difference Result 299 states and 398 transitions. [2021-05-06 02:37:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:37:49,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 77 [2021-05-06 02:37:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:49,432 INFO L225 Difference]: With dead ends: 299 [2021-05-06 02:37:49,432 INFO L226 Difference]: Without dead ends: 297 [2021-05-06 02:37:49,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:37:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-06 02:37:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 279. [2021-05-06 02:37:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 165 states have internal predecessors, (190), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 02:37:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 378 transitions. [2021-05-06 02:37:49,464 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 378 transitions. Word has length 77 [2021-05-06 02:37:49,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:49,465 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 378 transitions. [2021-05-06 02:37:49,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:37:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 378 transitions. [2021-05-06 02:37:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 02:37:49,466 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:49,466 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-06 02:37:49,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:37:49,685 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:49,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:49,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1033380920, now seen corresponding path program 1 times [2021-05-06 02:37:49,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:49,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705059904] [2021-05-06 02:37:49,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:49,690 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:49,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512143640] [2021-05-06 02:37:49,690 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 02:37:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:49,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:37:49,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:49,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 02:37:49,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:49,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705059904] [2021-05-06 02:37:49,908 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:49,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512143640] [2021-05-06 02:37:49,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512143640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:49,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:49,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:37:49,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175589665] [2021-05-06 02:37:49,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:37:49,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:49,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:37:49,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:37:49,910 INFO L87 Difference]: Start difference. First operand 279 states and 378 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:37:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:50,229 INFO L93 Difference]: Finished difference Result 353 states and 483 transitions. [2021-05-06 02:37:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:37:50,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2021-05-06 02:37:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:50,231 INFO L225 Difference]: With dead ends: 353 [2021-05-06 02:37:50,231 INFO L226 Difference]: Without dead ends: 351 [2021-05-06 02:37:50,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:37:50,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-06 02:37:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 297. [2021-05-06 02:37:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 170 states have (on average 1.1647058823529413) internal successors, (198), 175 states have internal predecessors, (198), 103 states have call successors, (103), 24 states have call predecessors, (103), 23 states have return successors, (101), 97 states have call predecessors, (101), 101 states have call successors, (101) [2021-05-06 02:37:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 402 transitions. [2021-05-06 02:37:50,267 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 402 transitions. Word has length 79 [2021-05-06 02:37:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:50,268 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 402 transitions. [2021-05-06 02:37:50,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:37:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 402 transitions. [2021-05-06 02:37:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 02:37:50,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:50,269 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, 1, 1, 1] [2021-05-06 02:37:50,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:50,486 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 1 times [2021-05-06 02:37:50,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:50,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962521989] [2021-05-06 02:37:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:50,492 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:50,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759849937] [2021-05-06 02:37:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:37:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:50,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 02:37:50,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:50,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-06 02:37:50,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:50,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962521989] [2021-05-06 02:37:50,911 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:50,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759849937] [2021-05-06 02:37:50,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759849937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:50,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:50,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:37:50,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546528908] [2021-05-06 02:37:50,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:37:50,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:50,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:37:50,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:37:50,912 INFO L87 Difference]: Start difference. First operand 297 states and 402 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:37:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:51,540 INFO L93 Difference]: Finished difference Result 380 states and 520 transitions. [2021-05-06 02:37:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:37:51,541 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2021-05-06 02:37:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:51,542 INFO L225 Difference]: With dead ends: 380 [2021-05-06 02:37:51,542 INFO L226 Difference]: Without dead ends: 377 [2021-05-06 02:37:51,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 375.2ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:37:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-06 02:37:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 362. [2021-05-06 02:37:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 204 states have (on average 1.1813725490196079) internal successors, (241), 209 states have internal predecessors, (241), 131 states have call successors, (131), 27 states have call predecessors, (131), 26 states have return successors, (129), 125 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-06 02:37:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 501 transitions. [2021-05-06 02:37:51,583 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 501 transitions. Word has length 86 [2021-05-06 02:37:51,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:51,584 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 501 transitions. [2021-05-06 02:37:51,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:37:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 501 transitions. [2021-05-06 02:37:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 02:37:51,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:51,586 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, 1, 1] [2021-05-06 02:37:51,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:51,801 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:51,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 2 times [2021-05-06 02:37:51,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:51,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308529613] [2021-05-06 02:37:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:51,806 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:51,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801614341] [2021-05-06 02:37:51,806 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 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 02:37:51,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:51,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:51,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 02:37:51,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:52,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:37:52,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:52,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308529613] [2021-05-06 02:37:52,266 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:52,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801614341] [2021-05-06 02:37:52,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801614341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:52,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:52,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:37:52,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940479376] [2021-05-06 02:37:52,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:37:52,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:52,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:37:52,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:37:52,267 INFO L87 Difference]: Start difference. First operand 362 states and 501 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:37:52,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:52,963 INFO L93 Difference]: Finished difference Result 454 states and 627 transitions. [2021-05-06 02:37:52,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:37:52,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2021-05-06 02:37:52,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:52,965 INFO L225 Difference]: With dead ends: 454 [2021-05-06 02:37:52,965 INFO L226 Difference]: Without dead ends: 451 [2021-05-06 02:37:52,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-06 02:37:52,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-05-06 02:37:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 431. [2021-05-06 02:37:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 241 states have (on average 1.1908713692946058) internal successors, (287), 246 states have internal predecessors, (287), 159 states have call successors, (159), 31 states have call predecessors, (159), 30 states have return successors, (157), 153 states have call predecessors, (157), 157 states have call successors, (157) [2021-05-06 02:37:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 603 transitions. [2021-05-06 02:37:53,013 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 603 transitions. Word has length 91 [2021-05-06 02:37:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:53,013 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 603 transitions. [2021-05-06 02:37:53,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:37:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 603 transitions. [2021-05-06 02:37:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 02:37:53,014 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:53,014 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 02:37:53,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 02:37:53,221 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:53,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1426729189, now seen corresponding path program 2 times [2021-05-06 02:37:53,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:53,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735755961] [2021-05-06 02:37:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:53,226 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:53,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158144343] [2021-05-06 02:37:53,227 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 02:37:53,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:53,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:53,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 02:37:53,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:53,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-06 02:37:53,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:53,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735755961] [2021-05-06 02:37:53,491 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:53,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158144343] [2021-05-06 02:37:53,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158144343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:53,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:53,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:37:53,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187935049] [2021-05-06 02:37:53,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:37:53,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:53,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:37:53,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:37:53,492 INFO L87 Difference]: Start difference. First operand 431 states and 603 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 02:37:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:53,795 INFO L93 Difference]: Finished difference Result 470 states and 660 transitions. [2021-05-06 02:37:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:37:53,796 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 96 [2021-05-06 02:37:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:53,798 INFO L225 Difference]: With dead ends: 470 [2021-05-06 02:37:53,798 INFO L226 Difference]: Without dead ends: 468 [2021-05-06 02:37:53,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:37:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-06 02:37:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 452. [2021-05-06 02:37:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 249 states have (on average 1.1927710843373494) internal successors, (297), 255 states have internal predecessors, (297), 171 states have call successors, (171), 32 states have call predecessors, (171), 31 states have return successors, (169), 164 states have call predecessors, (169), 169 states have call successors, (169) [2021-05-06 02:37:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 637 transitions. [2021-05-06 02:37:53,849 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 637 transitions. Word has length 96 [2021-05-06 02:37:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:53,849 INFO L480 AbstractCegarLoop]: Abstraction has 452 states and 637 transitions. [2021-05-06 02:37:53,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 02:37:53,850 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 637 transitions. [2021-05-06 02:37:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 02:37:53,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:53,850 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 02:37:54,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 02:37:54,065 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:54,065 INFO L82 PathProgramCache]: Analyzing trace with hash 844095065, now seen corresponding path program 2 times [2021-05-06 02:37:54,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:54,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605847022] [2021-05-06 02:37:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:54,075 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:54,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016904499] [2021-05-06 02:37:54,075 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 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 02:37:54,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:54,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:54,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:37:54,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:54,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-06 02:37:54,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:54,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605847022] [2021-05-06 02:37:54,314 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:54,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016904499] [2021-05-06 02:37:54,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016904499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:54,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:54,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:37:54,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078184636] [2021-05-06 02:37:54,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:37:54,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:54,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:37:54,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:37:54,315 INFO L87 Difference]: Start difference. First operand 452 states and 637 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 02:37:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:54,711 INFO L93 Difference]: Finished difference Result 535 states and 760 transitions. [2021-05-06 02:37:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:37:54,712 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), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 101 [2021-05-06 02:37:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:54,714 INFO L225 Difference]: With dead ends: 535 [2021-05-06 02:37:54,714 INFO L226 Difference]: Without dead ends: 533 [2021-05-06 02:37:54,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-05-06 02:37:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-05-06 02:37:54,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 473. [2021-05-06 02:37:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 257 states have (on average 1.1945525291828794) internal successors, (307), 264 states have internal predecessors, (307), 183 states have call successors, (183), 33 states have call predecessors, (183), 32 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2021-05-06 02:37:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 671 transitions. [2021-05-06 02:37:54,777 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 671 transitions. Word has length 101 [2021-05-06 02:37:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:54,777 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 671 transitions. [2021-05-06 02:37:54,777 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), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 02:37:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 671 transitions. [2021-05-06 02:37:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 02:37:54,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:54,778 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 02:37:54,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:54,985 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:54,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:54,986 INFO L82 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 5 times [2021-05-06 02:37:54,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:54,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418854738] [2021-05-06 02:37:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:54,990 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:54,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482754886] [2021-05-06 02:37:54,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 02:37:55,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 02:37:55,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:55,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-06 02:37:55,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:55,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 49 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-06 02:37:55,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:55,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418854738] [2021-05-06 02:37:55,551 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:55,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482754886] [2021-05-06 02:37:55,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482754886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:55,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:55,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 02:37:55,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152274939] [2021-05-06 02:37:55,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 02:37:55,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:55,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 02:37:55,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:37:55,552 INFO L87 Difference]: Start difference. First operand 473 states and 671 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:37:56,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:56,455 INFO L93 Difference]: Finished difference Result 544 states and 759 transitions. [2021-05-06 02:37:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:37:56,455 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 102 [2021-05-06 02:37:56,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:56,457 INFO L225 Difference]: With dead ends: 544 [2021-05-06 02:37:56,458 INFO L226 Difference]: Without dead ends: 542 [2021-05-06 02:37:56,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 526.5ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-05-06 02:37:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-05-06 02:37:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 481. [2021-05-06 02:37:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 263 states have (on average 1.1901140684410647) internal successors, (313), 270 states have internal predecessors, (313), 183 states have call successors, (183), 35 states have call predecessors, (183), 34 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2021-05-06 02:37:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 677 transitions. [2021-05-06 02:37:56,536 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 677 transitions. Word has length 102 [2021-05-06 02:37:56,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:56,536 INFO L480 AbstractCegarLoop]: Abstraction has 481 states and 677 transitions. [2021-05-06 02:37:56,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:37:56,537 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 677 transitions. [2021-05-06 02:37:56,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:37:56,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:56,538 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, 1, 1, 1] [2021-05-06 02:37:56,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:37:56,753 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:56,753 INFO L82 PathProgramCache]: Analyzing trace with hash -543529628, now seen corresponding path program 1 times [2021-05-06 02:37:56,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:56,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713730104] [2021-05-06 02:37:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:56,764 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:56,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326259545] [2021-05-06 02:37:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:37:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:56,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:37:56,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:56,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-05-06 02:37:56,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:56,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713730104] [2021-05-06 02:37:56,996 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:56,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326259545] [2021-05-06 02:37:56,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326259545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:56,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:56,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:37:56,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240686134] [2021-05-06 02:37:56,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:37:56,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:56,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:37:56,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:37:56,998 INFO L87 Difference]: Start difference. First operand 481 states and 677 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-05-06 02:37:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:57,308 INFO L93 Difference]: Finished difference Result 571 states and 821 transitions. [2021-05-06 02:37:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:37:57,314 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 104 [2021-05-06 02:37:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:57,316 INFO L225 Difference]: With dead ends: 571 [2021-05-06 02:37:57,316 INFO L226 Difference]: Without dead ends: 569 [2021-05-06 02:37:57,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:37:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-05-06 02:37:57,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 535. [2021-05-06 02:37:57,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 276 states have (on average 1.181159420289855) internal successors, (326), 293 states have internal predecessors, (326), 223 states have call successors, (223), 36 states have call predecessors, (223), 35 states have return successors, (221), 205 states have call predecessors, (221), 221 states have call successors, (221) [2021-05-06 02:37:57,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 770 transitions. [2021-05-06 02:37:57,396 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 770 transitions. Word has length 104 [2021-05-06 02:37:57,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:57,397 INFO L480 AbstractCegarLoop]: Abstraction has 535 states and 770 transitions. [2021-05-06 02:37:57,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-05-06 02:37:57,397 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 770 transitions. [2021-05-06 02:37:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 02:37:57,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:57,398 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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, 1, 1, 1, 1] [2021-05-06 02:37:57,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:57,613 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:57,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:57,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 3 times [2021-05-06 02:37:57,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:57,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413913314] [2021-05-06 02:37:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:57,618 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:57,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022543202] [2021-05-06 02:37:57,618 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 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 02:37:57,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:37:57,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:57,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-06 02:37:57,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:57,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:57,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:58,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:58,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:58,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 58 proven. 14 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-05-06 02:37:58,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:58,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413913314] [2021-05-06 02:37:58,151 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:58,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022543202] [2021-05-06 02:37:58,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022543202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:58,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:58,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:37:58,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611138561] [2021-05-06 02:37:58,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:37:58,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:58,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:37:58,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:37:58,152 INFO L87 Difference]: Start difference. First operand 535 states and 770 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:37:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:59,003 INFO L93 Difference]: Finished difference Result 636 states and 918 transitions. [2021-05-06 02:37:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:37:59,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 108 [2021-05-06 02:37:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:59,006 INFO L225 Difference]: With dead ends: 636 [2021-05-06 02:37:59,006 INFO L226 Difference]: Without dead ends: 633 [2021-05-06 02:37:59,008 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 398.6ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-06 02:37:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-05-06 02:37:59,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 615. [2021-05-06 02:37:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 313 states have (on average 1.1884984025559104) internal successors, (372), 333 states have internal predecessors, (372), 263 states have call successors, (263), 39 states have call predecessors, (263), 38 states have return successors, (261), 242 states have call predecessors, (261), 261 states have call successors, (261) [2021-05-06 02:37:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 896 transitions. [2021-05-06 02:37:59,091 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 896 transitions. Word has length 108 [2021-05-06 02:37:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:59,091 INFO L480 AbstractCegarLoop]: Abstraction has 615 states and 896 transitions. [2021-05-06 02:37:59,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:37:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 896 transitions. [2021-05-06 02:37:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 02:37:59,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:59,093 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 02:37:59,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:37:59,309 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:59,309 INFO L82 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 6 times [2021-05-06 02:37:59,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:59,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972499945] [2021-05-06 02:37:59,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:59,314 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:59,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463582322] [2021-05-06 02:37:59,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:59,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:37:59,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:59,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 02:37:59,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:59,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 02:37:59,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:59,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972499945] [2021-05-06 02:37:59,614 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:59,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463582322] [2021-05-06 02:37:59,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463582322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:59,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:59,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:37:59,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612937674] [2021-05-06 02:37:59,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:37:59,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:59,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:37:59,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:37:59,615 INFO L87 Difference]: Start difference. First operand 615 states and 896 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:38:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:00,347 INFO L93 Difference]: Finished difference Result 637 states and 918 transitions. [2021-05-06 02:38:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:38:00,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 107 [2021-05-06 02:38:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:00,350 INFO L225 Difference]: With dead ends: 637 [2021-05-06 02:38:00,350 INFO L226 Difference]: Without dead ends: 635 [2021-05-06 02:38:00,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:38:00,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-05-06 02:38:00,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 628. [2021-05-06 02:38:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 322 states have (on average 1.1832298136645962) internal successors, (381), 343 states have internal predecessors, (381), 265 states have call successors, (265), 41 states have call predecessors, (265), 40 states have return successors, (263), 243 states have call predecessors, (263), 263 states have call successors, (263) [2021-05-06 02:38:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 909 transitions. [2021-05-06 02:38:00,435 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 909 transitions. Word has length 107 [2021-05-06 02:38:00,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:00,435 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 909 transitions. [2021-05-06 02:38:00,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:38:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 909 transitions. [2021-05-06 02:38:00,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 02:38:00,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:00,437 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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, 1, 1, 1, 1] [2021-05-06 02:38:00,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 02:38:00,653 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 4 times [2021-05-06 02:38:00,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:00,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223291602] [2021-05-06 02:38:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:00,660 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:00,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101889083] [2021-05-06 02:38:00,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:00,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:38:00,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:00,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-06 02:38:00,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:00,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,327 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-06 02:38:01,573 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-06 02:38:01,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 95 proven. 61 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-05-06 02:38:02,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:02,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223291602] [2021-05-06 02:38:02,084 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:02,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101889083] [2021-05-06 02:38:02,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101889083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:02,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:02,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 02:38:02,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539211447] [2021-05-06 02:38:02,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 02:38:02,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:02,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 02:38:02,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:38:02,085 INFO L87 Difference]: Start difference. First operand 628 states and 909 transitions. Second operand has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 02:38:03,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:03,055 INFO L93 Difference]: Finished difference Result 828 states and 1179 transitions. [2021-05-06 02:38:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 02:38:03,056 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2021-05-06 02:38:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:03,056 INFO L225 Difference]: With dead ends: 828 [2021-05-06 02:38:03,056 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:38:03,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1221.6ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-05-06 02:38:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:38:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:38:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 02:38:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:38:03,059 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 111 [2021-05-06 02:38:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:03,059 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:38:03,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 02:38:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:38:03,059 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:38:03,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:38:03,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:38:04,042 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 333 [2021-05-06 02:38:04,617 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 333 [2021-05-06 02:38:05,096 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 333 [2021-05-06 02:38:05,436 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 324 [2021-05-06 02:38:06,068 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 329 [2021-05-06 02:38:06,484 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 329 [2021-05-06 02:38:07,008 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2021-05-06 02:38:13,655 WARN L205 SmtUtils]: Spent 6.58 s on a formula simplification. DAG size of input: 327 DAG size of output: 57 [2021-05-06 02:38:20,330 WARN L205 SmtUtils]: Spent 6.66 s on a formula simplification. DAG size of input: 327 DAG size of output: 57 [2021-05-06 02:38:26,298 WARN L205 SmtUtils]: Spent 5.97 s on a formula simplification. DAG size of input: 327 DAG size of output: 57 [2021-05-06 02:38:29,401 WARN L205 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 311 DAG size of output: 52 [2021-05-06 02:38:38,781 WARN L205 SmtUtils]: Spent 9.35 s on a formula simplification. DAG size of input: 323 DAG size of output: 45 [2021-05-06 02:38:44,847 WARN L205 SmtUtils]: Spent 6.06 s on a formula simplification. DAG size of input: 323 DAG size of output: 45 [2021-05-06 02:38:45,241 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2021-05-06 02:38:45,244 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-06 02:38:45,244 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-06 02:38:45,244 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-06 02:38:45,244 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:38:45,244 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 02:38:45,244 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:38:45,244 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:38:45,244 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 02:38:45,244 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:38:45,244 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:38:45,244 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-06 02:38:45,244 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-06 02:38:45,245 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:38:45,245 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:38:45,245 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 100)) (.cse2 (<= main_~x~0 100))) (or (and (= main_~r~0 0) .cse0 (= main_~b~0 main_~y~0) .cse1 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (<= main_~a~0 main_~x~0) (<= 1 main_~b~0) .cse2 (= main_~p~0 1) (= main_~s~0 1) (<= main_~x~0 main_~a~0)) (and .cse0 .cse1 (<= 0 main_~c~0) (< main_~b~0 main_~a~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0) (<= 0 main_~b~0) .cse2))) [2021-05-06 02:38:45,245 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 73) the Hoare annotation is: (let ((.cse9 (* main_~x~0 main_~p~0))) (let ((.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) .cse9))) (.cse6 (<= main_~y~0 100)) (.cse2 (< main_~b~0 main_~a~0)) (.cse0 (= main_~r~0 1)) (.cse7 (<= 1 main_~y~0)) (.cse4 (<= main_~x~0 100)) (.cse5 (= main_~a~0 main_~y~0))) (or (let ((.cse3 (* main_~y~0 2))) (and (= (+ (* main_~r~0 2) main_~s~0) 0) .cse0 .cse1 .cse2 (= .cse3 main_~x~0) .cse4 (= main_~q~0 1) .cse5 (= (+ .cse3 main_~b~0) main_~x~0))) (and (<= 1 main_~x~0) .cse6 (<= 0 main_~c~0) .cse2 .cse1 .cse7 (<= 0 main_~b~0) .cse4) (let ((.cse8 (* main_~x~0 2))) (and (= main_~y~0 .cse8) (= main_~y~0 (+ .cse8 main_~b~0)) (= main_~r~0 0) (= main_~a~0 main_~x~0) .cse6 .cse2 (= main_~x~0 .cse9) (= (+ (* main_~p~0 2) main_~q~0) 0) (= main_~s~0 1))) (and (= main_~p~0 0) (= main_~x~0 (+ main_~y~0 main_~b~0)) .cse0 (= (+ main_~p~0 main_~q~0) 1) (= main_~y~0 main_~x~0) .cse7 .cse4 .cse5 (= (+ main_~s~0 1) 0))))) [2021-05-06 02:38:45,245 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2021-05-06 02:38:45,245 INFO L194 CegarLoopUtils]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse1 (<= 0 main_~c~0)) (.cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse3 (<= 1 main_~y~0)) (.cse4 (<= main_~x~0 100)) (.cse5 (<= main_~v~0 main_~c~0))) (or (and (= main_~r~0 0) (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse0 .cse1 .cse2 .cse3 .cse4 (<= main_~b~0 main_~x~0) .cse5) (and (<= 1 main_~x~0) (<= main_~y~0 100) .cse0 .cse1 .cse2 (< main_~b~0 main_~a~0) (<= 0 main_~b~0) (not (= main_~b~0 0)) .cse3 .cse4 .cse5))) [2021-05-06 02:38:45,245 INFO L198 CegarLoopUtils]: For program point L36(lines 36 37) no Hoare annotation was computed. [2021-05-06 02:38:45,245 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 100)) [2021-05-06 02:38:45,245 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= main_~y~0 100) (<= 0 main_~x~0) (<= 0 main_~y~0) (<= main_~x~0 100)) [2021-05-06 02:38:45,245 INFO L198 CegarLoopUtils]: For program point L53(lines 49 59) no Hoare annotation was computed. [2021-05-06 02:38:45,245 INFO L194 CegarLoopUtils]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 100)) (.cse2 (<= 0 main_~x~0)) (.cse6 (<= 0 main_~b~0)) (.cse5 (not (= main_~b~0 0))) (.cse8 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse9 (<= 0 main_~c~0)) (.cse3 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse4 (<= 1 main_~y~0)) (.cse7 (<= main_~x~0 100)) (.cse10 (<= main_~v~0 main_~c~0))) (or (and .cse0 (= main_~k~0 0) (< main_~b~0 main_~c~0) .cse1 .cse2 .cse3 (= main_~b~0 main_~v~0) .cse4 .cse5 (= main_~c~0 main_~a~0) .cse6 (= main_~d~0 1) .cse7) (and .cse0 .cse1 .cse8 .cse2 .cse9 .cse3 (< main_~b~0 main_~a~0) .cse6 .cse5 .cse4 .cse7 .cse10) (and (= main_~r~0 0) (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse8 .cse9 .cse3 .cse4 .cse7 (<= main_~b~0 main_~x~0) .cse10))) [2021-05-06 02:38:45,245 INFO L198 CegarLoopUtils]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2021-05-06 02:38:45,245 INFO L198 CegarLoopUtils]: For program point L74(line 74) no Hoare annotation was computed. [2021-05-06 02:38:45,245 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~y~0 100) (<= 0 main_~y~0) (<= main_~x~0 100)) [2021-05-06 02:38:45,245 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 100)) (.cse2 (<= 0 main_~x~0)) (.cse6 (<= 0 main_~b~0)) (.cse5 (not (= main_~b~0 0))) (.cse8 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse9 (<= 0 main_~c~0)) (.cse3 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse4 (<= 1 main_~y~0)) (.cse7 (<= main_~x~0 100)) (.cse10 (<= main_~v~0 main_~c~0))) (or (and .cse0 (= main_~k~0 0) (< main_~b~0 main_~c~0) .cse1 .cse2 .cse3 (= main_~b~0 main_~v~0) .cse4 .cse5 (= main_~c~0 main_~a~0) .cse6 (= main_~d~0 1) .cse7) (and .cse0 .cse1 .cse8 .cse2 .cse9 .cse3 (< main_~b~0 main_~a~0) .cse6 .cse5 .cse4 .cse7 .cse10) (and (= main_~r~0 0) (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse8 .cse9 .cse3 .cse4 .cse7 (<= main_~b~0 main_~x~0) .cse10))) [2021-05-06 02:38:45,245 INFO L194 CegarLoopUtils]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 100)) (.cse2 (<= 0 main_~x~0)) (.cse6 (<= 0 main_~b~0)) (.cse5 (not (= main_~b~0 0))) (.cse8 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse9 (<= 0 main_~c~0)) (.cse3 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse4 (<= 1 main_~y~0)) (.cse7 (<= main_~x~0 100)) (.cse10 (<= main_~v~0 main_~c~0))) (or (and .cse0 (= main_~k~0 0) (< main_~b~0 main_~c~0) .cse1 .cse2 .cse3 (= main_~b~0 main_~v~0) .cse4 .cse5 (= main_~c~0 main_~a~0) .cse6 (= main_~d~0 1) .cse7) (and .cse0 .cse1 .cse8 .cse2 .cse9 .cse3 (< main_~b~0 main_~a~0) .cse6 .cse5 .cse4 .cse7 .cse10) (and (= main_~r~0 0) (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse8 .cse9 .cse3 .cse4 .cse7 (<= main_~b~0 main_~x~0) .cse10))) [2021-05-06 02:38:45,246 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2021-05-06 02:38:45,246 INFO L194 CegarLoopUtils]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse6 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (let ((.cse1 (= main_~k~0 0)) (.cse0 (<= 1 main_~x~0)) (.cse7 (<= main_~y~0 100)) (.cse8 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse14 (< main_~b~0 main_~a~0)) (.cse13 (= main_~a~0 .cse6)) (.cse17 (<= 0 main_~b~0)) (.cse16 (not (= main_~b~0 0))) (.cse15 (<= 1 main_~y~0)) (.cse4 (= main_~r~0 0)) (.cse5 (= main_~b~0 main_~y~0)) (.cse18 (<= 0 main_~c~0)) (.cse2 (<= main_~a~0 main_~x~0)) (.cse3 (<= 1 main_~b~0)) (.cse9 (<= main_~x~0 100)) (.cse10 (= main_~p~0 1)) (.cse12 (<= main_~x~0 main_~a~0)) (.cse11 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (= main_~c~0 .cse6) .cse7 .cse8 .cse9 .cse10 .cse11 .cse12) (and .cse0 .cse1 .cse7 .cse13 .cse14 .cse15 .cse16 (= main_~c~0 main_~a~0) .cse17 .cse9) (and .cse0 .cse7 .cse8 .cse18 .cse14 .cse13 .cse17 .cse16 .cse15 .cse9) (and .cse4 (= main_~q~0 0) .cse5 .cse18 .cse2 .cse3 .cse9 .cse10 (<= main_~b~0 main_~x~0) .cse12 .cse11)))) [2021-05-06 02:38:45,246 INFO L198 CegarLoopUtils]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2021-05-06 02:38:45,246 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2021-05-06 02:38:45,246 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-06 02:38:45,246 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-06 02:38:45,246 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-06 02:38:45,246 INFO L194 CegarLoopUtils]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse1 (<= 0 main_~c~0)) (.cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse3 (<= 1 main_~y~0)) (.cse4 (<= main_~x~0 100)) (.cse5 (<= main_~v~0 main_~c~0))) (or (and (= main_~r~0 0) (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse0 .cse1 .cse2 .cse3 .cse4 (<= main_~b~0 main_~x~0) .cse5) (and (<= 1 main_~x~0) (<= main_~y~0 100) .cse0 .cse1 .cse2 (< main_~b~0 main_~a~0) (<= 0 main_~b~0) (not (= main_~b~0 0)) .cse3 .cse4 .cse5))) [2021-05-06 02:38:45,246 INFO L198 CegarLoopUtils]: For program point L43(lines 43 44) no Hoare annotation was computed. [2021-05-06 02:38:45,246 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-06 02:38:45,246 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-06 02:38:45,246 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-06 02:38:45,246 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:38:45,246 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:38:45,246 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-06 02:38:45,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:38:45 BoogieIcfgContainer [2021-05-06 02:38:45,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:38:45,269 INFO L168 Benchmark]: Toolchain (without parser) took 67037.50 ms. Allocated memory was 200.3 MB in the beginning and 515.9 MB in the end (delta: 315.6 MB). Free memory was 165.1 MB in the beginning and 226.2 MB in the end (delta: -61.1 MB). Peak memory consumption was 304.3 MB. Max. memory is 8.0 GB. [2021-05-06 02:38:45,269 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 200.3 MB. Free memory is still 181.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:38:45,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.88 ms. Allocated memory is still 200.3 MB. Free memory was 164.9 MB in the beginning and 182.1 MB in the end (delta: -17.2 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. [2021-05-06 02:38:45,269 INFO L168 Benchmark]: Boogie Preprocessor took 34.84 ms. Allocated memory is still 200.3 MB. Free memory was 182.1 MB in the beginning and 180.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 02:38:45,269 INFO L168 Benchmark]: RCFGBuilder took 302.75 ms. Allocated memory is still 200.3 MB. Free memory was 180.6 MB in the beginning and 163.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:38:45,269 INFO L168 Benchmark]: TraceAbstraction took 66459.02 ms. Allocated memory was 200.3 MB in the beginning and 515.9 MB in the end (delta: 315.6 MB). Free memory was 162.8 MB in the beginning and 226.2 MB in the end (delta: -63.4 MB). Peak memory consumption was 301.9 MB. Max. memory is 8.0 GB. [2021-05-06 02:38:45,269 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 200.3 MB. Free memory is still 181.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 235.88 ms. Allocated memory is still 200.3 MB. Free memory was 164.9 MB in the beginning and 182.1 MB in the end (delta: -17.2 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.84 ms. Allocated memory is still 200.3 MB. Free memory was 182.1 MB in the beginning and 180.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 302.75 ms. Allocated memory is still 200.3 MB. Free memory was 180.6 MB in the beginning and 163.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 66459.02 ms. Allocated memory was 200.3 MB in the beginning and 515.9 MB in the end (delta: 315.6 MB). Free memory was 162.8 MB in the beginning and 226.2 MB in the end (delta: -63.4 MB). Peak memory consumption was 301.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24425.8ms, OverallIterations: 28, TraceHistogramMax: 13, EmptinessCheckTime: 28.5ms, AutomataDifference: 9085.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 41967.1ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1412 SDtfs, 1325 SDslu, 7551 SDs, 0 SdLazy, 7747 SolverSat, 1183 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4972.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2089 GetRequests, 1689 SyntacticMatches, 8 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 4941.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=628occurred in iteration=27, InterpolantAutomatonStates: 318, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 900.3ms AutomataMinimizationTime, 28 MinimizatonAttempts, 591 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 424 PreInvPairs, 811 NumberOfFragments, 1081 HoareAnnotationTreeSize, 424 FomulaSimplifications, 367267376 FormulaSimplificationTreeSizeReduction, 3208.9ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 25515565 FormulaSimplificationTreeSizeReductionInter, 38714.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 218.4ms SsaConstructionTime, 812.0ms SatisfiabilityAnalysisTime, 6500.1ms InterpolantComputationTime, 1967 NumberOfCodeBlocks, 1833 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 1939 ConstructedInterpolants, 0 QuantifiedInterpolants, 10532 SizeOfPredicates, 170 NumberOfNonLiveVariables, 5825 ConjunctsInSsa, 822 ConjunctsInUnsatCore, 28 InterpolantComputations, 7 PerfectInterpolantSequences, 3064/3439 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((r == 0 && 1 <= x) && b == y) && y <= 100) && b == y * s + x * q) && a <= x) && 1 <= b) && x <= 100) && p == 1) && s == 1) && x <= a) || (((((((1 <= x && y <= 100) && 0 <= c) && b < a) && a == y * r + x * p) && 1 <= y) && 0 <= b) && x <= 100) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((((1 <= x && k == 0) && a <= x) && 1 <= b) && r == 0) && b == y) && c == y * r + x * p) && y <= 100) && b == y * s + x * q) && x <= 100) && p == 1) && s == 1) && x <= a) || (((((((((1 <= x && k == 0) && y <= 100) && a == y * r + x * p) && b < a) && 1 <= y) && !(b == 0)) && c == a) && 0 <= b) && x <= 100)) || (((((((((1 <= x && y <= 100) && b == y * s + x * q) && 0 <= c) && b < a) && a == y * r + x * p) && 0 <= b) && !(b == 0)) && 1 <= y) && x <= 100)) || ((((((((((r == 0 && q == 0) && b == y) && 0 <= c) && a <= x) && 1 <= b) && x <= 100) && p == 1) && b <= x) && x <= a) && s == 1) - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((((((1 <= x && k == 0) && b < c) && y <= 100) && 0 <= x) && a == y * r + x * p) && b == v) && 1 <= y) && !(b == 0)) && c == a) && 0 <= b) && d == 1) && x <= 100) || (((((((((((1 <= x && y <= 100) && b == y * s + x * q) && 0 <= x) && 0 <= c) && a == y * r + x * p) && b < a) && 0 <= b) && !(b == 0)) && 1 <= y) && x <= 100) && v <= c)) || ((((((((((r == 0 && q == 0) && b == y) && a == x) && b == y * s + x * q) && 0 <= c) && a == y * r + x * p) && 1 <= y) && x <= 100) && b <= x) && v <= c) RESULT: Ultimate proved your program to be correct! Received shutdown request...