/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:58:06,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:58:06,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:58:06,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:58:06,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:58:06,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:58:06,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:58:06,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:58:06,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:58:06,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:58:06,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:58:06,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:58:06,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:58:06,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:58:06,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:58:06,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:58:06,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:58:06,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:58:06,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:58:06,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:58:06,369 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:58:06,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:58:06,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:58:06,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:58:06,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:58:06,412 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:58:06,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:58:06,412 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:58:06,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:58:06,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:58:06,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:58:06,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:58:06,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:58:06,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:58:06,414 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:58:06,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:58:06,415 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:58:06,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:58:06,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:58:06,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:58:06,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:58:06,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:58:06,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:58:06,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:58:06,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:58:06,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:58:06,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:58:06,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:58:06,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:58:06,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:58:06,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:58:06,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:58:06,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:58:06,740 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:58:06,741 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:58:06,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2021-05-02 14:58:06,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ffdb0cc/56132dc89df04a55b9f21b4c8539e2aa/FLAGee51d92ae [2021-05-02 14:58:07,163 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:58:07,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2021-05-02 14:58:07,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ffdb0cc/56132dc89df04a55b9f21b4c8539e2aa/FLAGee51d92ae [2021-05-02 14:58:07,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ffdb0cc/56132dc89df04a55b9f21b4c8539e2aa [2021-05-02 14:58:07,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:58:07,565 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:58:07,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:58:07,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:58:07,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:58:07,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:58:07" (1/1) ... [2021-05-02 14:58:07,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760d9ad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:07, skipping insertion in model container [2021-05-02 14:58:07,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:58:07" (1/1) ... [2021-05-02 14:58:07,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:58:07,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:58:07,711 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2021-05-02 14:58:07,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:58:07,734 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:58:07,775 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2021-05-02 14:58:07,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:58:07,804 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:58:07,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:07 WrapperNode [2021-05-02 14:58:07,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:58:07,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:58:07,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:58:07,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:58:07,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:07" (1/1) ... [2021-05-02 14:58:07,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:07" (1/1) ... [2021-05-02 14:58:07,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:07" (1/1) ... [2021-05-02 14:58:07,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:07" (1/1) ... [2021-05-02 14:58:07,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:07" (1/1) ... [2021-05-02 14:58:07,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:07" (1/1) ... [2021-05-02 14:58:07,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:07" (1/1) ... [2021-05-02 14:58:07,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:58:07,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:58:07,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:58:07,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:58:07,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:58:07,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:58:07,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:58:07,911 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:58:07,911 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:58:07,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:58:07,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:58:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:58:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:58:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:58:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:58:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:58:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:58:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:58:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:58:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:58:07,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:58:07,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:58:07,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:58:07,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:58:07,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:58:08,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:58:08,140 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:58:08,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:58:08 BoogieIcfgContainer [2021-05-02 14:58:08,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:58:08,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:58:08,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:58:08,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:58:08,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:58:07" (1/3) ... [2021-05-02 14:58:08,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb49e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:58:08, skipping insertion in model container [2021-05-02 14:58:08,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:07" (2/3) ... [2021-05-02 14:58:08,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb49e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:58:08, skipping insertion in model container [2021-05-02 14:58:08,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:58:08" (3/3) ... [2021-05-02 14:58:08,147 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.c [2021-05-02 14:58:08,152 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:58:08,156 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:58:08,170 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:58:08,188 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:58:08,189 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:58:08,189 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:58:08,189 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:58:08,189 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:58:08,189 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:58:08,189 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:58:08,189 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:58:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 14:58:08,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:58:08,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:08,219 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:08,219 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:08,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:08,224 INFO L82 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2021-05-02 14:58:08,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:08,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544563451] [2021-05-02 14:58:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:08,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:58:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:08,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:58:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:08,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:58:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:08,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:58:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:08,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:58:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:08,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 14:58:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:08,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 14:58:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 14:58:08,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:08,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544563451] [2021-05-02 14:58:08,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544563451] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:58:08,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:58:08,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:58:08,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886462588] [2021-05-02 14:58:08,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:58:08,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:08,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:58:08,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:58:08,615 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:58:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:08,791 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2021-05-02 14:58:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:58:08,794 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 14:58:08,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:08,800 INFO L225 Difference]: With dead ends: 73 [2021-05-02 14:58:08,800 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:58:08,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:58:08,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:58:08,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:58:08,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:58:08,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 14:58:08,865 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 14:58:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:08,865 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 14:58:08,866 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:58:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 14:58:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 14:58:08,868 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:08,868 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-02 14:58:08,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:58:08,869 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:08,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:08,870 INFO L82 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2021-05-02 14:58:08,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:08,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108023878] [2021-05-02 14:58:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:08,900 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:08,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671547213] [2021-05-02 14:58:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:08,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:58:08,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:09,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:09,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:09,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:09,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:09,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 14:58:09,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:09,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108023878] [2021-05-02 14:58:09,194 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:09,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671547213] [2021-05-02 14:58:09,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671547213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:09,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:09,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:58:09,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759639459] [2021-05-02 14:58:09,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:58:09,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:09,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:58:09,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:58:09,198 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (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) [2021-05-02 14:58:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:09,341 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-05-02 14:58:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:58:09,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (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 44 [2021-05-02 14:58:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:09,345 INFO L225 Difference]: With dead ends: 52 [2021-05-02 14:58:09,346 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 14:58:09,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:58:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 14:58:09,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 14:58:09,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:58:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 14:58:09,370 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-02 14:58:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:09,370 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 14:58:09,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (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) [2021-05-02 14:58:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 14:58:09,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 14:58:09,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:09,374 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-02 14:58:09,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:58:09,593 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:09,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:09,593 INFO L82 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2021-05-02 14:58:09,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:09,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61507394] [2021-05-02 14:58:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:09,606 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:09,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137895520] [2021-05-02 14:58:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:09,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:58:09,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:09,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:09,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:09,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:09,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:09,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:09,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:09,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:09,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:58:09,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:09,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61507394] [2021-05-02 14:58:09,816 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:09,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137895520] [2021-05-02 14:58:09,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137895520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:09,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:09,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:58:09,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417204499] [2021-05-02 14:58:09,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:58:09,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:09,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:58:09,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:58:09,818 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 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) [2021-05-02 14:58:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:09,976 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-05-02 14:58:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:58:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 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 45 [2021-05-02 14:58:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:09,978 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:58:09,978 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:58:09,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:58:09,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:58:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-02 14:58:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 14:58:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-02 14:58:09,997 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-02 14:58:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:09,997 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-02 14:58:09,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 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) [2021-05-02 14:58:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-02 14:58:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 14:58:09,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:09,999 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:10,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:10,209 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:10,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:10,211 INFO L82 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2021-05-02 14:58:10,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:10,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101664405] [2021-05-02 14:58:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:10,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:10,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984554277] [2021-05-02 14:58:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:10,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:58:10,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:10,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:58:10,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:10,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101664405] [2021-05-02 14:58:10,567 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:10,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984554277] [2021-05-02 14:58:10,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984554277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:10,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:10,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:58:10,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828969172] [2021-05-02 14:58:10,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:58:10,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:10,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:58:10,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:58:10,572 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:58:10,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:10,731 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-02 14:58:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:58:10,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-05-02 14:58:10,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:10,734 INFO L225 Difference]: With dead ends: 56 [2021-05-02 14:58:10,734 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:58:10,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:58:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:58:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 14:58:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:58:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-02 14:58:10,745 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-02 14:58:10,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:10,746 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-02 14:58:10,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:58:10,746 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-02 14:58:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 14:58:10,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:10,747 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2021-05-02 14:58:10,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:10,965 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:10,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:10,966 INFO L82 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2021-05-02 14:58:10,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:10,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811589140] [2021-05-02 14:58:10,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:10,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:10,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673463486] [2021-05-02 14:58:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:11,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:58:11,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:11,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 14:58:11,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:11,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811589140] [2021-05-02 14:58:11,273 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:11,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673463486] [2021-05-02 14:58:11,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673463486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:11,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:11,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:58:11,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419791990] [2021-05-02 14:58:11,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:58:11,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:11,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:58:11,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:58:11,274 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:58:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:11,423 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-02 14:58:11,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:58:11,423 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 14:58:11,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:11,425 INFO L225 Difference]: With dead ends: 60 [2021-05-02 14:58:11,425 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 14:58:11,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:58:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 14:58:11,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 14:58:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:58:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-02 14:58:11,435 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-02 14:58:11,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:11,436 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-02 14:58:11,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:58:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-02 14:58:11,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 14:58:11,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:11,437 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2021-05-02 14:58:11,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:11,653 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:11,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2021-05-02 14:58:11,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:11,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316612754] [2021-05-02 14:58:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:11,665 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:11,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142656684] [2021-05-02 14:58:11,666 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 [2021-05-02 14:58:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:11,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:58:11,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:11,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-05-02 14:58:11,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:11,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316612754] [2021-05-02 14:58:11,966 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:11,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142656684] [2021-05-02 14:58:11,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142656684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:11,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:11,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:58:11,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915343065] [2021-05-02 14:58:11,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:58:11,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:11,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:58:11,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:58:11,968 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 14:58:14,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:14,255 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-05-02 14:58:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:58:14,256 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 60 [2021-05-02 14:58:14,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:14,257 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:58:14,257 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 14:58:14,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:58:14,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 14:58:14,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 14:58:14,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:58:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-02 14:58:14,268 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-02 14:58:14,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:14,269 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-02 14:58:14,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 14:58:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-02 14:58:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 14:58:14,270 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:14,270 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:14,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:58:14,489 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:14,489 INFO L82 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2021-05-02 14:58:14,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:14,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475418607] [2021-05-02 14:58:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:14,499 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:14,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57507786] [2021-05-02 14:58:14,499 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 [2021-05-02 14:58:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:58:14,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:14,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 14:58:14,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:14,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475418607] [2021-05-02 14:58:14,711 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:14,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57507786] [2021-05-02 14:58:14,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57507786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:14,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:14,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:58:14,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248177891] [2021-05-02 14:58:14,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:58:14,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:14,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:58:14,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:58:14,715 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 14:58:14,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:14,898 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2021-05-02 14:58:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:58:14,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2021-05-02 14:58:14,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:14,900 INFO L225 Difference]: With dead ends: 91 [2021-05-02 14:58:14,900 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 14:58:14,900 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:58:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 14:58:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-05-02 14:58:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 45 states have internal predecessors, (48), 28 states have call successors, (28), 9 states have call predecessors, (28), 8 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 14:58:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 14:58:14,931 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 67 [2021-05-02 14:58:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:14,931 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 14:58:14,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 14:58:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 14:58:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:58:14,934 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:14,934 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:15,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:15,157 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:15,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2021-05-02 14:58:15,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:15,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54219057] [2021-05-02 14:58:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:15,175 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:15,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353829180] [2021-05-02 14:58:15,176 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 [2021-05-02 14:58:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:15,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:58:15,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:15,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 14:58:15,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:15,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54219057] [2021-05-02 14:58:15,402 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:15,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353829180] [2021-05-02 14:58:15,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353829180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:15,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:15,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:58:15,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703247536] [2021-05-02 14:58:15,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:58:15,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:15,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:58:15,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:58:15,404 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:58:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:15,579 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2021-05-02 14:58:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:58:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 14:58:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:15,584 INFO L225 Difference]: With dead ends: 124 [2021-05-02 14:58:15,584 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 14:58:15,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:58:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 14:58:15,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2021-05-02 14:58:15,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 59 states have internal predecessors, (65), 41 states have call successors, (41), 9 states have call predecessors, (41), 8 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 14:58:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 145 transitions. [2021-05-02 14:58:15,620 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 145 transitions. Word has length 69 [2021-05-02 14:58:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:15,620 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 145 transitions. [2021-05-02 14:58:15,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:58:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 145 transitions. [2021-05-02 14:58:15,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 14:58:15,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:15,625 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1] [2021-05-02 14:58:15,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:15,842 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:15,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:15,842 INFO L82 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2021-05-02 14:58:15,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:15,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492031277] [2021-05-02 14:58:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:15,861 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:15,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762796578] [2021-05-02 14:58:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:15,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:58:15,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:15,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:15,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-05-02 14:58:16,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:16,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492031277] [2021-05-02 14:58:16,222 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:16,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762796578] [2021-05-02 14:58:16,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762796578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:16,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:16,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:58:16,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035573559] [2021-05-02 14:58:16,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:58:16,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:16,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:58:16,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:58:16,228 INFO L87 Difference]: Start difference. First operand 105 states and 145 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:58:16,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:16,485 INFO L93 Difference]: Finished difference Result 150 states and 213 transitions. [2021-05-02 14:58:16,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:58:16,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2021-05-02 14:58:16,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:16,487 INFO L225 Difference]: With dead ends: 150 [2021-05-02 14:58:16,487 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 14:58:16,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:58:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 14:58:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-05-02 14:58:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 81 states have internal predecessors, (89), 60 states have call successors, (60), 10 states have call predecessors, (60), 9 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:58:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 206 transitions. [2021-05-02 14:58:16,511 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 206 transitions. Word has length 75 [2021-05-02 14:58:16,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:16,511 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 206 transitions. [2021-05-02 14:58:16,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:58:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 206 transitions. [2021-05-02 14:58:16,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:58:16,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:16,513 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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] [2021-05-02 14:58:16,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:58:16,729 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 2 times [2021-05-02 14:58:16,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:16,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051528529] [2021-05-02 14:58:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:16,738 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:16,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400470577] [2021-05-02 14:58:16,738 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 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 [2021-05-02 14:58:16,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:58:16,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:16,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 14:58:16,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:16,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:16,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-02 14:58:17,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:17,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051528529] [2021-05-02 14:58:17,091 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:17,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400470577] [2021-05-02 14:58:17,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400470577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:17,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:17,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:58:17,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636805428] [2021-05-02 14:58:17,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:58:17,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:17,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:58:17,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:58:17,094 INFO L87 Difference]: Start difference. First operand 144 states and 206 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:58:17,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:17,349 INFO L93 Difference]: Finished difference Result 152 states and 213 transitions. [2021-05-02 14:58:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:58:17,350 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-02 14:58:17,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:17,352 INFO L225 Difference]: With dead ends: 152 [2021-05-02 14:58:17,352 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 14:58:17,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:58:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 14:58:17,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-05-02 14:58:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 84 states have internal predecessors, (92), 60 states have call successors, (60), 11 states have call predecessors, (60), 10 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:58:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2021-05-02 14:58:17,374 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 80 [2021-05-02 14:58:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:17,374 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2021-05-02 14:58:17,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:58:17,375 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2021-05-02 14:58:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 14:58:17,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:17,375 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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] [2021-05-02 14:58:17,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:17,589 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:17,589 INFO L82 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 3 times [2021-05-02 14:58:17,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:17,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113878478] [2021-05-02 14:58:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:17,598 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:17,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891558039] [2021-05-02 14:58:17,598 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 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 [2021-05-02 14:58:17,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:58:17,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:17,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 14:58:17,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:17,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:17,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:18,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:18,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:18,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-05-02 14:58:18,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:18,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113878478] [2021-05-02 14:58:18,042 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:18,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891558039] [2021-05-02 14:58:18,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891558039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:18,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:18,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:58:18,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121138590] [2021-05-02 14:58:18,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:58:18,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:18,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:58:18,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:58:18,044 INFO L87 Difference]: Start difference. First operand 148 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:58:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:18,451 INFO L93 Difference]: Finished difference Result 156 states and 216 transitions. [2021-05-02 14:58:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:58:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-02 14:58:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:18,452 INFO L225 Difference]: With dead ends: 156 [2021-05-02 14:58:18,453 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 14:58:18,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:58:18,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 14:58:18,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-05-02 14:58:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 80 states have (on average 1.1875) internal successors, (95), 87 states have internal predecessors, (95), 60 states have call successors, (60), 12 states have call predecessors, (60), 11 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:58:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 212 transitions. [2021-05-02 14:58:18,473 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 212 transitions. Word has length 85 [2021-05-02 14:58:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:18,473 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 212 transitions. [2021-05-02 14:58:18,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:58:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 212 transitions. [2021-05-02 14:58:18,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 14:58:18,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:18,475 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:18,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:18,697 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:18,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:18,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1507900548, now seen corresponding path program 2 times [2021-05-02 14:58:18,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:18,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331776988] [2021-05-02 14:58:18,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:18,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:18,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555845281] [2021-05-02 14:58:18,706 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 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 [2021-05-02 14:58:18,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:58:18,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:18,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:58:18,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:18,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-02 14:58:18,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:18,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331776988] [2021-05-02 14:58:18,999 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:18,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555845281] [2021-05-02 14:58:18,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555845281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:18,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:19,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:58:19,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211309558] [2021-05-02 14:58:19,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:58:19,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:19,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:58:19,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:58:19,001 INFO L87 Difference]: Start difference. First operand 152 states and 212 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 14:58:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:19,353 INFO L93 Difference]: Finished difference Result 215 states and 319 transitions. [2021-05-02 14:58:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:58:19,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 89 [2021-05-02 14:58:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:19,355 INFO L225 Difference]: With dead ends: 215 [2021-05-02 14:58:19,355 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 14:58:19,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:58:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 14:58:19,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 186. [2021-05-02 14:58:19,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 100 states have internal predecessors, (113), 80 states have call successors, (80), 13 states have call predecessors, (80), 12 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-02 14:58:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 270 transitions. [2021-05-02 14:58:19,384 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 270 transitions. Word has length 89 [2021-05-02 14:58:19,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:19,384 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 270 transitions. [2021-05-02 14:58:19,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 14:58:19,385 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 270 transitions. [2021-05-02 14:58:19,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 14:58:19,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:19,386 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1] [2021-05-02 14:58:19,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:58:19,605 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:19,605 INFO L82 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2021-05-02 14:58:19,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:19,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864566930] [2021-05-02 14:58:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:19,612 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:19,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298958871] [2021-05-02 14:58:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:19,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 14:58:19,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:19,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:19,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:20,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:20,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:20,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:20,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:20,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:20,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:20,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:20,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-05-02 14:58:20,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:20,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864566930] [2021-05-02 14:58:20,193 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:20,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298958871] [2021-05-02 14:58:20,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298958871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:20,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:20,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:58:20,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606903871] [2021-05-02 14:58:20,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:58:20,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:20,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:58:20,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:58:20,195 INFO L87 Difference]: Start difference. First operand 186 states and 270 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 14:58:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:20,736 INFO L93 Difference]: Finished difference Result 221 states and 320 transitions. [2021-05-02 14:58:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:58:20,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 91 [2021-05-02 14:58:20,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:20,738 INFO L225 Difference]: With dead ends: 221 [2021-05-02 14:58:20,738 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 14:58:20,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 395.5ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:58:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 14:58:20,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-05-02 14:58:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 117 states have internal predecessors, (132), 93 states have call successors, (93), 15 states have call predecessors, (93), 14 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2021-05-02 14:58:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 315 transitions. [2021-05-02 14:58:20,775 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 315 transitions. Word has length 91 [2021-05-02 14:58:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:20,777 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 315 transitions. [2021-05-02 14:58:20,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 14:58:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 315 transitions. [2021-05-02 14:58:20,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 14:58:20,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:20,780 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 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, 1, 1, 1, 1] [2021-05-02 14:58:20,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:58:20,997 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:20,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:20,997 INFO L82 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 4 times [2021-05-02 14:58:20,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:20,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287475825] [2021-05-02 14:58:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:21,004 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:21,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002005454] [2021-05-02 14:58:21,005 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 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 [2021-05-02 14:58:21,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:58:21,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:21,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:58:21,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:21,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-02 14:58:21,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:21,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287475825] [2021-05-02 14:58:21,243 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:21,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002005454] [2021-05-02 14:58:21,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002005454] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:58:21,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:58:21,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:58:21,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565717164] [2021-05-02 14:58:21,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:58:21,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:21,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:58:21,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:58:21,246 INFO L87 Difference]: Start difference. First operand 217 states and 315 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 14:58:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:21,313 INFO L93 Difference]: Finished difference Result 265 states and 384 transitions. [2021-05-02 14:58:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:58:21,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2021-05-02 14:58:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:21,320 INFO L225 Difference]: With dead ends: 265 [2021-05-02 14:58:21,320 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 14:58:21,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:58:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 14:58:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2021-05-02 14:58:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 94 states have (on average 1.148936170212766) internal successors, (108), 101 states have internal predecessors, (108), 76 states have call successors, (76), 15 states have call predecessors, (76), 14 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 14:58:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 257 transitions. [2021-05-02 14:58:21,347 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 257 transitions. Word has length 100 [2021-05-02 14:58:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:21,347 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 257 transitions. [2021-05-02 14:58:21,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 14:58:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 257 transitions. [2021-05-02 14:58:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 14:58:21,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:21,349 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 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] [2021-05-02 14:58:21,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:58:21,561 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:21,561 INFO L82 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2021-05-02 14:58:21,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:21,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610685503] [2021-05-02 14:58:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:21,571 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:21,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062102243] [2021-05-02 14:58:21,572 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 [2021-05-02 14:58:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 14:58:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:21,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:21,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:22,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:22,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:22,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:22,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:22,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:22,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:22,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:22,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:22,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:22,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 68 proven. 41 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-05-02 14:58:22,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:22,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610685503] [2021-05-02 14:58:22,235 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:22,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062102243] [2021-05-02 14:58:22,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062102243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:22,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:22,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:58:22,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445136938] [2021-05-02 14:58:22,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:58:22,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:22,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:58:22,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:58:22,239 INFO L87 Difference]: Start difference. First operand 185 states and 257 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:58:28,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:28,925 INFO L93 Difference]: Finished difference Result 192 states and 263 transitions. [2021-05-02 14:58:28,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:58:28,926 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2021-05-02 14:58:28,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:28,928 INFO L225 Difference]: With dead ends: 192 [2021-05-02 14:58:28,928 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 14:58:28,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 461.3ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:58:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 14:58:28,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 158. [2021-05-02 14:58:28,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 87 states have internal predecessors, (93), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:58:28,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 216 transitions. [2021-05-02 14:58:28,951 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 216 transitions. Word has length 107 [2021-05-02 14:58:28,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:28,952 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 216 transitions. [2021-05-02 14:58:28,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:58:28,952 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 216 transitions. [2021-05-02 14:58:28,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 14:58:28,953 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:28,953 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:29,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:29,169 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:29,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1483033219, now seen corresponding path program 3 times [2021-05-02 14:58:29,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:29,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525842214] [2021-05-02 14:58:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:29,177 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:29,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414567264] [2021-05-02 14:58:29,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:29,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:58:29,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:29,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 14:58:29,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:29,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:29,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:29,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:29,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:29,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:29,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 87 proven. 11 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-05-02 14:58:29,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:29,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525842214] [2021-05-02 14:58:29,468 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:29,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414567264] [2021-05-02 14:58:29,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414567264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:29,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:29,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:58:29,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724391660] [2021-05-02 14:58:29,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:58:29,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:29,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:58:29,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:58:29,470 INFO L87 Difference]: Start difference. First operand 158 states and 216 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-02 14:58:29,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:29,570 INFO L93 Difference]: Finished difference Result 164 states and 221 transitions. [2021-05-02 14:58:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:58:29,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-05-02 14:58:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:29,572 INFO L225 Difference]: With dead ends: 164 [2021-05-02 14:58:29,572 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 14:58:29,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:58:29,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 14:58:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 138. [2021-05-02 14:58:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 79 states have internal predecessors, (83), 50 states have call successors, (50), 14 states have call predecessors, (50), 13 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 14:58:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2021-05-02 14:58:29,594 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 111 [2021-05-02 14:58:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:29,595 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2021-05-02 14:58:29,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-02 14:58:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2021-05-02 14:58:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 14:58:29,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:29,596 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 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, 1, 1, 1, 1, 1] [2021-05-02 14:58:29,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:58:29,809 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 2 times [2021-05-02 14:58:29,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:29,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361952522] [2021-05-02 14:58:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:29,814 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:29,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272733031] [2021-05-02 14:58:29,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:29,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:58:29,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:29,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 14:58:29,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:29,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:29,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:29,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:29,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:29,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:29,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 75 proven. 65 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-05-02 14:58:30,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:30,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361952522] [2021-05-02 14:58:30,602 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:30,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272733031] [2021-05-02 14:58:30,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272733031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:30,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:30,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:58:30,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084174854] [2021-05-02 14:58:30,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:58:30,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:30,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:58:30,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:58:30,604 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:58:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:31,363 INFO L93 Difference]: Finished difference Result 174 states and 230 transitions. [2021-05-02 14:58:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:58:31,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 113 [2021-05-02 14:58:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:31,365 INFO L225 Difference]: With dead ends: 174 [2021-05-02 14:58:31,365 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 14:58:31,366 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 521.8ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 14:58:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 14:58:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2021-05-02 14:58:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 96 states have internal predecessors, (101), 63 states have call successors, (63), 16 states have call predecessors, (63), 15 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:58:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 224 transitions. [2021-05-02 14:58:31,391 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 224 transitions. Word has length 113 [2021-05-02 14:58:31,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:31,391 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 224 transitions. [2021-05-02 14:58:31,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:58:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 224 transitions. [2021-05-02 14:58:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 14:58:31,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:31,392 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:31,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:58:31,616 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:31,617 INFO L82 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 3 times [2021-05-02 14:58:31,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:31,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646701618] [2021-05-02 14:58:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:31,637 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:31,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057878482] [2021-05-02 14:58:31,637 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 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 [2021-05-02 14:58:31,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:58:31,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:58:31,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:31,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-02 14:58:31,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:31,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646701618] [2021-05-02 14:58:31,898 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:31,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057878482] [2021-05-02 14:58:31,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057878482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:31,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:31,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:58:31,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506547802] [2021-05-02 14:58:31,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:58:31,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:31,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:58:31,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:58:31,899 INFO L87 Difference]: Start difference. First operand 169 states and 224 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-02 14:58:32,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:32,151 INFO L93 Difference]: Finished difference Result 215 states and 301 transitions. [2021-05-02 14:58:32,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:58:32,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2021-05-02 14:58:32,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:32,153 INFO L225 Difference]: With dead ends: 215 [2021-05-02 14:58:32,153 INFO L226 Difference]: Without dead ends: 207 [2021-05-02 14:58:32,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:58:32,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-02 14:58:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 188. [2021-05-02 14:58:32,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 99 states have internal predecessors, (112), 75 states have call successors, (75), 16 states have call predecessors, (75), 15 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:58:32,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 259 transitions. [2021-05-02 14:58:32,183 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 259 transitions. Word has length 116 [2021-05-02 14:58:32,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:32,183 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 259 transitions. [2021-05-02 14:58:32,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-02 14:58:32,183 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 259 transitions. [2021-05-02 14:58:32,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 14:58:32,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:32,184 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 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, 1] [2021-05-02 14:58:32,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:58:32,404 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:32,405 INFO L82 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 2 times [2021-05-02 14:58:32,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:32,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479394200] [2021-05-02 14:58:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:32,413 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:32,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589231651] [2021-05-02 14:58:32,413 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 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 [2021-05-02 14:58:32,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:58:32,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:32,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:58:32,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:32,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:32,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 49 proven. 62 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-05-02 14:58:33,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:33,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479394200] [2021-05-02 14:58:33,068 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:33,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589231651] [2021-05-02 14:58:33,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589231651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:33,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:33,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:58:33,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629762377] [2021-05-02 14:58:33,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:58:33,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:33,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:58:33,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:58:33,069 INFO L87 Difference]: Start difference. First operand 188 states and 259 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 14:58:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:37,204 INFO L93 Difference]: Finished difference Result 267 states and 380 transitions. [2021-05-02 14:58:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 14:58:37,204 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 122 [2021-05-02 14:58:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:37,206 INFO L225 Difference]: With dead ends: 267 [2021-05-02 14:58:37,206 INFO L226 Difference]: Without dead ends: 265 [2021-05-02 14:58:37,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1290.6ms TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 14:58:37,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-02 14:58:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2021-05-02 14:58:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 132 states have internal predecessors, (152), 111 states have call successors, (111), 18 states have call predecessors, (111), 17 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2021-05-02 14:58:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 371 transitions. [2021-05-02 14:58:37,245 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 371 transitions. Word has length 122 [2021-05-02 14:58:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:37,245 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 371 transitions. [2021-05-02 14:58:37,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 14:58:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 371 transitions. [2021-05-02 14:58:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 14:58:37,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:37,247 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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, 1] [2021-05-02 14:58:37,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:37,461 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:37,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 3 times [2021-05-02 14:58:37,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:37,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247126578] [2021-05-02 14:58:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:37,470 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:37,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938796186] [2021-05-02 14:58:37,470 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 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 [2021-05-02 14:58:37,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:58:37,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:37,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 14:58:37,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:37,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:37,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:37,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:37,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:37,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 78 proven. 41 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-05-02 14:58:37,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:37,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247126578] [2021-05-02 14:58:37,948 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:37,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938796186] [2021-05-02 14:58:37,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938796186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:37,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:37,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:58:37,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796192176] [2021-05-02 14:58:37,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:58:37,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:37,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:58:37,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:58:37,950 INFO L87 Difference]: Start difference. First operand 259 states and 371 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 14:58:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:38,671 INFO L93 Difference]: Finished difference Result 301 states and 423 transitions. [2021-05-02 14:58:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:58:38,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-02 14:58:38,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:38,683 INFO L225 Difference]: With dead ends: 301 [2021-05-02 14:58:38,683 INFO L226 Difference]: Without dead ends: 299 [2021-05-02 14:58:38,683 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:58:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-02 14:58:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 296. [2021-05-02 14:58:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 151 states have (on average 1.1589403973509933) internal successors, (175), 153 states have internal predecessors, (175), 123 states have call successors, (123), 22 states have call predecessors, (123), 21 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 14:58:38,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 418 transitions. [2021-05-02 14:58:38,729 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 418 transitions. Word has length 127 [2021-05-02 14:58:38,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:38,729 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 418 transitions. [2021-05-02 14:58:38,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 14:58:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 418 transitions. [2021-05-02 14:58:38,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 14:58:38,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:38,732 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-02 14:58:38,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:38,949 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:38,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:38,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 4 times [2021-05-02 14:58:38,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:38,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738678297] [2021-05-02 14:58:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:38,956 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:38,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824756522] [2021-05-02 14:58:38,959 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 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 [2021-05-02 14:58:39,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:58:39,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:39,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 14:58:39,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:39,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 119 proven. 93 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-05-02 14:58:39,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:39,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738678297] [2021-05-02 14:58:39,838 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:39,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824756522] [2021-05-02 14:58:39,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824756522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:39,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:39,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:58:39,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357075599] [2021-05-02 14:58:39,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:58:39,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:39,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:58:39,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:58:39,840 INFO L87 Difference]: Start difference. First operand 296 states and 418 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 14:58:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:44,643 INFO L93 Difference]: Finished difference Result 316 states and 434 transitions. [2021-05-02 14:58:44,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:58:44,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2021-05-02 14:58:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:44,646 INFO L225 Difference]: With dead ends: 316 [2021-05-02 14:58:44,647 INFO L226 Difference]: Without dead ends: 314 [2021-05-02 14:58:44,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 566.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:58:44,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-02 14:58:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2021-05-02 14:58:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 163 states have (on average 1.147239263803681) internal successors, (187), 165 states have internal predecessors, (187), 123 states have call successors, (123), 26 states have call predecessors, (123), 25 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 14:58:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 430 transitions. [2021-05-02 14:58:44,709 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 430 transitions. Word has length 129 [2021-05-02 14:58:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:44,710 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 430 transitions. [2021-05-02 14:58:44,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 14:58:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 430 transitions. [2021-05-02 14:58:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 14:58:44,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:44,711 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 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, 1] [2021-05-02 14:58:44,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 14:58:44,936 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:44,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 5 times [2021-05-02 14:58:44,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:44,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874895869] [2021-05-02 14:58:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:44,943 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:44,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679021213] [2021-05-02 14:58:44,944 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 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 [2021-05-02 14:58:48,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 14:58:48,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:48,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-02 14:58:48,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:48,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:48,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 91 proven. 81 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-02 14:58:49,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:49,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874895869] [2021-05-02 14:58:49,785 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:49,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679021213] [2021-05-02 14:58:49,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679021213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:49,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:49,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 14:58:49,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743948754] [2021-05-02 14:58:49,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 14:58:49,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:49,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 14:58:49,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:58:49,787 INFO L87 Difference]: Start difference. First operand 312 states and 430 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-02 14:58:52,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:52,587 INFO L93 Difference]: Finished difference Result 335 states and 449 transitions. [2021-05-02 14:58:52,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 14:58:52,590 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) Word has length 132 [2021-05-02 14:58:52,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:52,592 INFO L225 Difference]: With dead ends: 335 [2021-05-02 14:58:52,592 INFO L226 Difference]: Without dead ends: 333 [2021-05-02 14:58:52,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1273.3ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:58:52,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-02 14:58:52,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 328. [2021-05-02 14:58:52,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 175 states have (on average 1.1371428571428572) internal successors, (199), 177 states have internal predecessors, (199), 123 states have call successors, (123), 30 states have call predecessors, (123), 29 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 14:58:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 442 transitions. [2021-05-02 14:58:52,642 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 442 transitions. Word has length 132 [2021-05-02 14:58:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:52,643 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 442 transitions. [2021-05-02 14:58:52,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-02 14:58:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 442 transitions. [2021-05-02 14:58:52,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 14:58:52,644 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:52,645 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-05-02 14:58:52,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:58:52,851 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:52,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 4 times [2021-05-02 14:58:52,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:52,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387937720] [2021-05-02 14:58:52,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:52,860 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:52,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646358916] [2021-05-02 14:58:52,860 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 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 [2021-05-02 14:58:52,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:58:52,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:52,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 14:58:52,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:52,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:52,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 84 proven. 85 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 14:58:53,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:53,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387937720] [2021-05-02 14:58:53,608 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:53,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646358916] [2021-05-02 14:58:53,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646358916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:53,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:53,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:58:53,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650507246] [2021-05-02 14:58:53,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:58:53,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:53,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:58:53,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:58:53,609 INFO L87 Difference]: Start difference. First operand 328 states and 442 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:58:54,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:54,591 INFO L93 Difference]: Finished difference Result 364 states and 497 transitions. [2021-05-02 14:58:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:58:54,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 135 [2021-05-02 14:58:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:54,594 INFO L225 Difference]: With dead ends: 364 [2021-05-02 14:58:54,594 INFO L226 Difference]: Without dead ends: 361 [2021-05-02 14:58:54,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 548.8ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 14:58:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-02 14:58:54,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 359. [2021-05-02 14:58:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 191 states have internal predecessors, (216), 139 states have call successors, (139), 31 states have call predecessors, (139), 30 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-02 14:58:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 491 transitions. [2021-05-02 14:58:54,647 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 491 transitions. Word has length 135 [2021-05-02 14:58:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:54,648 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 491 transitions. [2021-05-02 14:58:54,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:58:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 491 transitions. [2021-05-02 14:58:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 14:58:54,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:54,650 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:54,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:54,865 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 5 times [2021-05-02 14:58:54,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:54,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456330590] [2021-05-02 14:58:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:54,872 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:54,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643254383] [2021-05-02 14:58:54,872 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 [2021-05-02 14:58:54,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 14:58:54,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:54,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 14:58:55,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:55,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 102 proven. 153 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-05-02 14:59:00,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:00,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456330590] [2021-05-02 14:59:00,607 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:00,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643254383] [2021-05-02 14:59:00,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643254383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:00,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:00,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 14:59:00,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242850896] [2021-05-02 14:59:00,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 14:59:00,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:00,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 14:59:00,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=362, Unknown=1, NotChecked=0, Total=420 [2021-05-02 14:59:00,609 INFO L87 Difference]: Start difference. First operand 359 states and 491 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:59:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:06,685 INFO L93 Difference]: Finished difference Result 413 states and 561 transitions. [2021-05-02 14:59:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:59:06,686 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2021-05-02 14:59:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:06,689 INFO L225 Difference]: With dead ends: 413 [2021-05-02 14:59:06,689 INFO L226 Difference]: Without dead ends: 411 [2021-05-02 14:59:06,690 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 5539.6ms TimeCoverageRelationStatistics Valid=101, Invalid=710, Unknown=1, NotChecked=0, Total=812 [2021-05-02 14:59:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-02 14:59:06,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 407. [2021-05-02 14:59:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 215 states have (on average 1.1441860465116278) internal successors, (246), 218 states have internal predecessors, (246), 156 states have call successors, (156), 36 states have call predecessors, (156), 35 states have return successors, (153), 152 states have call predecessors, (153), 153 states have call successors, (153) [2021-05-02 14:59:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 555 transitions. [2021-05-02 14:59:06,757 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 555 transitions. Word has length 138 [2021-05-02 14:59:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:06,759 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 555 transitions. [2021-05-02 14:59:06,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:59:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 555 transitions. [2021-05-02 14:59:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 14:59:06,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:06,762 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:06,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 14:59:06,986 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:06,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:06,987 INFO L82 PathProgramCache]: Analyzing trace with hash -206620137, now seen corresponding path program 1 times [2021-05-02 14:59:06,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:06,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998789824] [2021-05-02 14:59:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:06,994 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:06,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430467945] [2021-05-02 14:59:06,994 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 [2021-05-02 14:59:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:07,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 14:59:07,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:07,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 59 proven. 123 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-05-02 14:59:07,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:07,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998789824] [2021-05-02 14:59:07,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:07,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430467945] [2021-05-02 14:59:07,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430467945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:07,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:07,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:59:07,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887939544] [2021-05-02 14:59:07,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 14:59:07,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:07,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 14:59:07,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:59:07,950 INFO L87 Difference]: Start difference. First operand 407 states and 555 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 14:59:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:09,238 INFO L93 Difference]: Finished difference Result 421 states and 567 transitions. [2021-05-02 14:59:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:59:09,239 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 143 [2021-05-02 14:59:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:09,241 INFO L225 Difference]: With dead ends: 421 [2021-05-02 14:59:09,241 INFO L226 Difference]: Without dead ends: 417 [2021-05-02 14:59:09,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 898.0ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:59:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-02 14:59:09,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 414. [2021-05-02 14:59:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 221 states have (on average 1.1357466063348416) internal successors, (251), 223 states have internal predecessors, (251), 155 states have call successors, (155), 38 states have call predecessors, (155), 37 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2021-05-02 14:59:09,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 558 transitions. [2021-05-02 14:59:09,305 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 558 transitions. Word has length 143 [2021-05-02 14:59:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:09,305 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 558 transitions. [2021-05-02 14:59:09,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 14:59:09,306 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 558 transitions. [2021-05-02 14:59:09,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 14:59:09,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:09,307 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 5, 5, 5, 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] [2021-05-02 14:59:09,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:09,521 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:09,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:09,521 INFO L82 PathProgramCache]: Analyzing trace with hash 391502270, now seen corresponding path program 6 times [2021-05-02 14:59:09,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:09,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525145890] [2021-05-02 14:59:09,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:09,527 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:09,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922096511] [2021-05-02 14:59:09,527 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 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 [2021-05-02 14:59:17,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 14:59:17,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:17,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 14:59:17,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:17,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:18,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:18,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:18,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:18,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:18,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:18,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:18,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:18,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:18,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:18,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:18,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:18,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,481 WARN L205 SmtUtils]: Spent 4.25 s on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 14:59:54,406 WARN L205 SmtUtils]: Spent 24.65 s on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 15:00:14,256 WARN L205 SmtUtils]: Spent 10.12 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 15:00:14,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:14,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:16,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:18,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,856 WARN L205 SmtUtils]: Spent 10.35 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:00:35,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:35,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:37,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:39,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:40,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,473 WARN L205 SmtUtils]: Spent 10.44 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:00:57,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:59,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:03,598 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_112 Int) (v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int)) (let ((.cse1 (* v_main_~x~0_BEFORE_CALL_261 v_main_~y~0_BEFORE_CALL_215)) (.cse0 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215))) (and (not (= v_main_~a~0_BEFORE_CALL_112 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))) (< v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215) (<= v_main_~x~0_BEFORE_CALL_261 50) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (= (+ v_main_~a~0_BEFORE_CALL_112 .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215)) (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215))) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_112))))) is different from false [2021-05-02 15:01:05,606 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_112 Int) (v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int)) (let ((.cse1 (* v_main_~x~0_BEFORE_CALL_261 v_main_~y~0_BEFORE_CALL_215)) (.cse0 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215))) (and (not (= v_main_~a~0_BEFORE_CALL_112 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))) (< v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215) (<= v_main_~x~0_BEFORE_CALL_261 50) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (= (+ v_main_~a~0_BEFORE_CALL_112 .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215)) (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215))) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_112))))) is different from true [2021-05-02 15:01:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 110 proven. 83 refuted. 4 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 15:01:05,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:05,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525145890] [2021-05-02 15:01:05,607 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:05,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922096511] [2021-05-02 15:01:05,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922096511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:05,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:05,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 15:01:05,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755480229] [2021-05-02 15:01:05,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 15:01:05,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:05,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 15:01:05,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=279, Unknown=14, NotChecked=34, Total=380 [2021-05-02 15:01:05,609 INFO L87 Difference]: Start difference. First operand 414 states and 558 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 15:01:18,296 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 40 DAG size of output: 6 [2021-05-02 15:01:46,400 WARN L205 SmtUtils]: Spent 8.83 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-02 15:02:39,301 WARN L205 SmtUtils]: Spent 43.34 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-05-02 15:03:43,370 WARN L205 SmtUtils]: Spent 29.46 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-02 15:04:27,092 WARN L838 $PredicateComparison]: unable to prove that (and (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond) (exists ((v_main_~a~0_BEFORE_CALL_112 Int) (v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int)) (let ((.cse1 (* v_main_~x~0_BEFORE_CALL_261 v_main_~y~0_BEFORE_CALL_215)) (.cse0 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215))) (and (not (= v_main_~a~0_BEFORE_CALL_112 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))) (< v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215) (<= v_main_~x~0_BEFORE_CALL_261 50) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (= (+ v_main_~a~0_BEFORE_CALL_112 .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215)) (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215))) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_112)))))) is different from false [2021-05-02 15:04:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:04:29,155 INFO L93 Difference]: Finished difference Result 469 states and 626 transitions. [2021-05-02 15:04:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 15:04:29,158 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 144 [2021-05-02 15:04:29,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:04:29,160 INFO L225 Difference]: With dead ends: 469 [2021-05-02 15:04:29,160 INFO L226 Difference]: Without dead ends: 467 [2021-05-02 15:04:29,161 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 211296.0ms TimeCoverageRelationStatistics Valid=102, Invalid=580, Unknown=28, NotChecked=102, Total=812 [2021-05-02 15:04:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-02 15:04:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 451. [2021-05-02 15:04:29,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 242 states have (on average 1.1322314049586777) internal successors, (274), 244 states have internal predecessors, (274), 167 states have call successors, (167), 42 states have call predecessors, (167), 41 states have return successors, (164), 164 states have call predecessors, (164), 164 states have call successors, (164) [2021-05-02 15:04:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 605 transitions. [2021-05-02 15:04:29,227 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 605 transitions. Word has length 144 [2021-05-02 15:04:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:04:29,228 INFO L480 AbstractCegarLoop]: Abstraction has 451 states and 605 transitions. [2021-05-02 15:04:29,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 15:04:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 605 transitions. [2021-05-02 15:04:29,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 15:04:29,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:04:29,230 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 15:04:29,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 15:04:29,441 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:04:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:04:29,442 INFO L82 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 7 times [2021-05-02 15:04:29,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:04:29,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101672478] [2021-05-02 15:04:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:04:29,448 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:04:29,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95275122] [2021-05-02 15:04:29,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-05-02 15:04:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:04:29,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 99 conjunts are in the unsatisfiable core [2021-05-02 15:04:29,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:04:29,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:29,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:30,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 129 proven. 197 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 15:04:31,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:04:31,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101672478] [2021-05-02 15:04:31,092 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:04:31,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95275122] [2021-05-02 15:04:31,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95275122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:04:31,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:04:31,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 15:04:31,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683601800] [2021-05-02 15:04:31,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 15:04:31,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:04:31,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 15:04:31,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-02 15:04:31,094 INFO L87 Difference]: Start difference. First operand 451 states and 605 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-02 15:04:33,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:04:33,056 INFO L93 Difference]: Finished difference Result 493 states and 657 transitions. [2021-05-02 15:04:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 15:04:33,057 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) Word has length 149 [2021-05-02 15:04:33,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:04:33,073 INFO L225 Difference]: With dead ends: 493 [2021-05-02 15:04:33,073 INFO L226 Difference]: Without dead ends: 491 [2021-05-02 15:04:33,074 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1338.5ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-02 15:04:33,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-05-02 15:04:33,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 488. [2021-05-02 15:04:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 263 states have (on average 1.129277566539924) internal successors, (297), 265 states have internal predecessors, (297), 179 states have call successors, (179), 46 states have call predecessors, (179), 45 states have return successors, (176), 176 states have call predecessors, (176), 176 states have call successors, (176) [2021-05-02 15:04:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 652 transitions. [2021-05-02 15:04:33,153 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 652 transitions. Word has length 149 [2021-05-02 15:04:33,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:04:33,154 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 652 transitions. [2021-05-02 15:04:33,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-02 15:04:33,154 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 652 transitions. [2021-05-02 15:04:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 15:04:33,156 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:04:33,156 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 15:04:33,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:04:33,374 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:04:33,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:04:33,374 INFO L82 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 8 times [2021-05-02 15:04:33,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:04:33,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568217225] [2021-05-02 15:04:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:04:33,381 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:04:33,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230076479] [2021-05-02 15:04:33,382 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 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 [2021-05-02 15:04:33,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:04:33,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:04:33,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 15:04:33,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:04:33,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:33,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:34,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 158 proven. 187 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-05-02 15:04:35,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:04:35,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568217225] [2021-05-02 15:04:35,054 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:04:35,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230076479] [2021-05-02 15:04:35,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230076479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:04:35,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:04:35,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 15:04:35,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404984047] [2021-05-02 15:04:35,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 15:04:35,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:04:35,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 15:04:35,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:04:35,055 INFO L87 Difference]: Start difference. First operand 488 states and 652 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-02 15:04:38,336 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-02 15:04:38,646 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-02 15:04:41,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:04:41,022 INFO L93 Difference]: Finished difference Result 496 states and 659 transitions. [2021-05-02 15:04:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 15:04:41,023 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Word has length 151 [2021-05-02 15:04:41,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:04:41,033 INFO L225 Difference]: With dead ends: 496 [2021-05-02 15:04:41,033 INFO L226 Difference]: Without dead ends: 494 [2021-05-02 15:04:41,034 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1373.5ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-02 15:04:41,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-05-02 15:04:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 492. [2021-05-02 15:04:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 266 states have (on average 1.1278195488721805) internal successors, (300), 268 states have internal predecessors, (300), 179 states have call successors, (179), 47 states have call predecessors, (179), 46 states have return successors, (176), 176 states have call predecessors, (176), 176 states have call successors, (176) [2021-05-02 15:04:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 655 transitions. [2021-05-02 15:04:41,119 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 655 transitions. Word has length 151 [2021-05-02 15:04:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:04:41,119 INFO L480 AbstractCegarLoop]: Abstraction has 492 states and 655 transitions. [2021-05-02 15:04:41,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-02 15:04:41,119 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 655 transitions. [2021-05-02 15:04:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 15:04:41,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:04:41,121 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 15:04:41,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 15:04:41,337 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:04:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:04:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 9 times [2021-05-02 15:04:41,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:04:41,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461595816] [2021-05-02 15:04:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:04:41,344 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:04:41,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248072503] [2021-05-02 15:04:41,345 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:04:41,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:04:41,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:04:41,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 15:04:41,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:04:41,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:42,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 91 proven. 58 refuted. 0 times theorem prover too weak. 696 trivial. 0 not checked. [2021-05-02 15:04:42,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:04:42,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461595816] [2021-05-02 15:04:42,071 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:04:42,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248072503] [2021-05-02 15:04:42,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248072503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:04:42,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:04:42,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:04:42,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704697806] [2021-05-02 15:04:42,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:04:42,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:04:42,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:04:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:04:42,072 INFO L87 Difference]: Start difference. First operand 492 states and 655 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-02 15:04:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:04:51,101 INFO L93 Difference]: Finished difference Result 535 states and 710 transitions. [2021-05-02 15:04:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:04:51,103 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 154 [2021-05-02 15:04:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:04:51,105 INFO L225 Difference]: With dead ends: 535 [2021-05-02 15:04:51,105 INFO L226 Difference]: Without dead ends: 533 [2021-05-02 15:04:51,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 541.8ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:04:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-05-02 15:04:51,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 529. [2021-05-02 15:04:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 287 states have (on average 1.1289198606271778) internal successors, (324), 289 states have internal predecessors, (324), 191 states have call successors, (191), 51 states have call predecessors, (191), 50 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2021-05-02 15:04:51,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 703 transitions. [2021-05-02 15:04:51,189 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 703 transitions. Word has length 154 [2021-05-02 15:04:51,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:04:51,190 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 703 transitions. [2021-05-02 15:04:51,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-02 15:04:51,190 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 703 transitions. [2021-05-02 15:04:51,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 15:04:51,191 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:04:51,191 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 15:04:51,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:04:51,412 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:04:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:04:51,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 10 times [2021-05-02 15:04:51,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:04:51,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216653881] [2021-05-02 15:04:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:04:51,423 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:04:51,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088563891] [2021-05-02 15:04:51,424 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:04:51,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:04:51,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:04:51,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 119 conjunts are in the unsatisfiable core [2021-05-02 15:04:51,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:04:51,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:51,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,554 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-02 15:04:52,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:52,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:53,217 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-02 15:04:53,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:53,510 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-02 15:04:53,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:53,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,418 WARN L205 SmtUtils]: Spent 11.62 s on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 15:05:36,356 WARN L205 SmtUtils]: Spent 11.17 s on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-05-02 15:05:36,824 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-02 15:05:36,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 198 proven. 182 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-05-02 15:05:37,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:05:37,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216653881] [2021-05-02 15:05:37,173 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:05:37,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088563891] [2021-05-02 15:05:37,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088563891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:05:37,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:05:37,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-02 15:05:37,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294708637] [2021-05-02 15:05:37,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 15:05:37,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:05:37,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 15:05:37,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=425, Unknown=9, NotChecked=0, Total=506 [2021-05-02 15:05:37,174 INFO L87 Difference]: Start difference. First operand 529 states and 703 transitions. Second operand has 23 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2021-05-02 15:05:41,013 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-02 15:05:47,048 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-02 15:06:04,545 WARN L205 SmtUtils]: Spent 8.63 s on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-05-02 15:06:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:06:10,166 INFO L93 Difference]: Finished difference Result 538 states and 711 transitions. [2021-05-02 15:06:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 15:06:10,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) Word has length 154 [2021-05-02 15:06:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:06:10,169 INFO L225 Difference]: With dead ends: 538 [2021-05-02 15:06:10,169 INFO L226 Difference]: Without dead ends: 536 [2021-05-02 15:06:10,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 59178.1ms TimeCoverageRelationStatistics Valid=113, Invalid=688, Unknown=11, NotChecked=0, Total=812 [2021-05-02 15:06:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-05-02 15:06:10,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 533. [2021-05-02 15:06:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 290 states have (on average 1.1275862068965516) internal successors, (327), 292 states have internal predecessors, (327), 191 states have call successors, (191), 52 states have call predecessors, (191), 51 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2021-05-02 15:06:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 706 transitions. [2021-05-02 15:06:10,255 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 706 transitions. Word has length 154 [2021-05-02 15:06:10,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:06:10,255 INFO L480 AbstractCegarLoop]: Abstraction has 533 states and 706 transitions. [2021-05-02 15:06:10,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2021-05-02 15:06:10,255 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 706 transitions. [2021-05-02 15:06:10,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 15:06:10,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:06:10,257 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:06:10,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 15:06:10,473 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:06:10,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:06:10,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 6 times [2021-05-02 15:06:10,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:06:10,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865170813] [2021-05-02 15:06:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:06:10,480 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:06:10,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902182782] [2021-05-02 15:06:10,481 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:06:10,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 15:06:10,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:06:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 15:06:10,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:06:10,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:10,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 96 proven. 34 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2021-05-02 15:06:11,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:06:11,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865170813] [2021-05-02 15:06:11,451 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:06:11,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902182782] [2021-05-02 15:06:11,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902182782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:06:11,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:06:11,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:06:11,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337725254] [2021-05-02 15:06:11,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:06:11,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:06:11,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:06:11,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:06:11,453 INFO L87 Difference]: Start difference. First operand 533 states and 706 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 15:06:14,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:06:14,955 INFO L93 Difference]: Finished difference Result 540 states and 712 transitions. [2021-05-02 15:06:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 15:06:14,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 157 [2021-05-02 15:06:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:06:14,959 INFO L225 Difference]: With dead ends: 540 [2021-05-02 15:06:14,959 INFO L226 Difference]: Without dead ends: 537 [2021-05-02 15:06:14,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 625.8ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:06:14,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-05-02 15:06:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 536. [2021-05-02 15:06:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 293 states have (on average 1.1228668941979523) internal successors, (329), 294 states have internal predecessors, (329), 190 states have call successors, (190), 53 states have call predecessors, (190), 52 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2021-05-02 15:06:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 707 transitions. [2021-05-02 15:06:15,043 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 707 transitions. Word has length 157 [2021-05-02 15:06:15,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:06:15,043 INFO L480 AbstractCegarLoop]: Abstraction has 536 states and 707 transitions. [2021-05-02 15:06:15,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 15:06:15,044 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 707 transitions. [2021-05-02 15:06:15,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 15:06:15,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:06:15,045 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 15:06:15,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:06:15,265 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:06:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:06:15,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 7 times [2021-05-02 15:06:15,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:06:15,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971937492] [2021-05-02 15:06:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:06:15,270 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:06:15,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405714311] [2021-05-02 15:06:15,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:06:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:06:15,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-02 15:06:15,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:06:15,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:15,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,236 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-05-02 15:06:16,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:16,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:17,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:17,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 142 proven. 133 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-05-02 15:06:17,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:06:17,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971937492] [2021-05-02 15:06:17,118 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:06:17,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405714311] [2021-05-02 15:06:17,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405714311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:06:17,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:06:17,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 15:06:17,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240742020] [2021-05-02 15:06:17,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 15:06:17,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:06:17,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 15:06:17,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-02 15:06:17,119 INFO L87 Difference]: Start difference. First operand 536 states and 707 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 12 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 11 states have call successors, (27) [2021-05-02 15:06:19,251 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-05-02 15:06:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:06:22,087 INFO L93 Difference]: Finished difference Result 585 states and 773 transitions. [2021-05-02 15:06:22,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 15:06:22,089 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 12 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 11 states have call successors, (27) Word has length 160 [2021-05-02 15:06:22,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:06:22,106 INFO L225 Difference]: With dead ends: 585 [2021-05-02 15:06:22,107 INFO L226 Difference]: Without dead ends: 583 [2021-05-02 15:06:22,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1626.4ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-05-02 15:06:22,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-05-02 15:06:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 580. [2021-05-02 15:06:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 316 states have (on average 1.1265822784810127) internal successors, (356), 318 states have internal predecessors, (356), 207 states have call successors, (207), 57 states have call predecessors, (207), 56 states have return successors, (205), 204 states have call predecessors, (205), 205 states have call successors, (205) [2021-05-02 15:06:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 768 transitions. [2021-05-02 15:06:22,204 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 768 transitions. Word has length 160 [2021-05-02 15:06:22,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:06:22,205 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 768 transitions. [2021-05-02 15:06:22,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 12 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 11 states have call successors, (27) [2021-05-02 15:06:22,205 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 768 transitions. [2021-05-02 15:06:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 15:06:22,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:06:22,206 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 15:06:22,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 15:06:22,429 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:06:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:06:22,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 8 times [2021-05-02 15:06:22,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:06:22,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241267501] [2021-05-02 15:06:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:06:22,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:06:22,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17671644] [2021-05-02 15:06:22,436 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:06:22,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:06:22,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:06:22,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-02 15:06:22,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:06:22,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:22,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:23,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:24,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:24,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:24,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 147 proven. 167 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-05-02 15:06:24,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:06:24,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241267501] [2021-05-02 15:06:24,551 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:06:24,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17671644] [2021-05-02 15:06:24,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17671644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:06:24,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:06:24,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 15:06:24,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493000565] [2021-05-02 15:06:24,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 15:06:24,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:06:24,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 15:06:24,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-02 15:06:24,552 INFO L87 Difference]: Start difference. First operand 580 states and 768 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-02 15:06:26,813 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-05-02 15:06:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:06:27,531 INFO L93 Difference]: Finished difference Result 626 states and 832 transitions. [2021-05-02 15:06:27,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 15:06:27,533 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 160 [2021-05-02 15:06:27,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:06:27,539 INFO L225 Difference]: With dead ends: 626 [2021-05-02 15:06:27,539 INFO L226 Difference]: Without dead ends: 624 [2021-05-02 15:06:27,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1934.2ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-05-02 15:06:27,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-05-02 15:06:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 620. [2021-05-02 15:06:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 336 states have (on average 1.130952380952381) internal successors, (380), 339 states have internal predecessors, (380), 224 states have call successors, (224), 60 states have call predecessors, (224), 59 states have return successors, (222), 220 states have call predecessors, (222), 222 states have call successors, (222) [2021-05-02 15:06:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 826 transitions. [2021-05-02 15:06:27,646 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 826 transitions. Word has length 160 [2021-05-02 15:06:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:06:27,647 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 826 transitions. [2021-05-02 15:06:27,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-02 15:06:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 826 transitions. [2021-05-02 15:06:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 15:06:27,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:06:27,649 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 15:06:27,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 15:06:27,863 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:06:27,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:06:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1959268472, now seen corresponding path program 2 times [2021-05-02 15:06:27,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:06:27,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191524058] [2021-05-02 15:06:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:06:27,869 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:06:27,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25345355] [2021-05-02 15:06:27,870 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:06:27,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:06:27,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:06:27,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 15:06:27,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:06:28,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:28,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:29,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:29,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:29,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:29,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:29,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:29,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:29,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:29,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:29,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 77 proven. 107 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2021-05-02 15:06:29,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:06:29,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191524058] [2021-05-02 15:06:29,425 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:06:29,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25345355] [2021-05-02 15:06:29,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25345355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:06:29,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:06:29,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 15:06:29,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34118437] [2021-05-02 15:06:29,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 15:06:29,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:06:29,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 15:06:29,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:06:29,426 INFO L87 Difference]: Start difference. First operand 620 states and 826 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 15:06:31,831 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-02 15:06:32,065 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-05-02 15:06:32,284 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-02 15:06:33,143 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-02 15:06:33,664 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-02 15:06:33,975 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-02 15:06:35,146 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-02 15:06:35,403 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-02 15:06:36,395 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-02 15:06:37,316 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-02 15:06:37,711 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-05-02 15:06:37,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:06:37,717 INFO L93 Difference]: Finished difference Result 734 states and 1008 transitions. [2021-05-02 15:06:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 15:06:37,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 165 [2021-05-02 15:06:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:06:37,722 INFO L225 Difference]: With dead ends: 734 [2021-05-02 15:06:37,722 INFO L226 Difference]: Without dead ends: 730 [2021-05-02 15:06:37,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 4724.5ms TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 15:06:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-05-02 15:06:37,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 697. [2021-05-02 15:06:37,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 369 states have (on average 1.1436314363143631) internal successors, (422), 373 states have internal predecessors, (422), 267 states have call successors, (267), 61 states have call predecessors, (267), 60 states have return successors, (264), 262 states have call predecessors, (264), 264 states have call successors, (264) [2021-05-02 15:06:37,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 953 transitions. [2021-05-02 15:06:37,834 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 953 transitions. Word has length 165 [2021-05-02 15:06:37,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:06:37,835 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 953 transitions. [2021-05-02 15:06:37,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 15:06:37,835 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 953 transitions. [2021-05-02 15:06:37,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 15:06:37,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:06:37,837 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 15:06:38,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:06:38,053 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:06:38,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:06:38,053 INFO L82 PathProgramCache]: Analyzing trace with hash 86569686, now seen corresponding path program 3 times [2021-05-02 15:06:38,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:06:38,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606253677] [2021-05-02 15:06:38,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:06:38,059 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:06:38,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446833787] [2021-05-02 15:06:38,059 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:07:34,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:07:34,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:07:34,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 15:07:34,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:34,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:34,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:34,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:34,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:34,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:34,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:34,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:34,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:34,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:34,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:34,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:34,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,887 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 15:07:38,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:38,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:41,199 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 15:07:45,411 WARN L205 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 15:07:47,530 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 15:07:47,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,836 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 15:07:49,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:54,210 WARN L205 SmtUtils]: Spent 4.13 s on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 15:08:07,371 WARN L205 SmtUtils]: Spent 9.79 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 15:08:19,010 WARN L205 SmtUtils]: Spent 7.45 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 15:08:29,195 WARN L205 SmtUtils]: Spent 5.11 s on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 15:08:29,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:29,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:29,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:29,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:29,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:29,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,857 WARN L205 SmtUtils]: Spent 10.52 s on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 15:08:48,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:48,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:51,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:53,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:55,235 WARN L838 $PredicateComparison]: unable to prove that (or (= |c___VERIFIER_assert_#in~cond| 1) (and (exists ((main_~q~0 Int) (v_main_~x~0_BEFORE_CALL_475 Int) (v_main_~y~0_BEFORE_CALL_419 Int) (v_main_~r~0_BEFORE_CALL_326 Int) (v_main_~a~0_BEFORE_CALL_207 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326))) (and (<= v_main_~x~0_BEFORE_CALL_475 50) (= (+ (* main_~q~0 v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326) (* main_~q~0 v_main_~x~0_BEFORE_CALL_475) v_main_~y~0_BEFORE_CALL_419) 0) (<= 0 v_main_~x~0_BEFORE_CALL_475) (= (+ (* v_main_~y~0_BEFORE_CALL_419 v_main_~a~0_BEFORE_CALL_207) v_main_~x~0_BEFORE_CALL_475 .cse0) (+ (* v_main_~y~0_BEFORE_CALL_419 v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326) (* v_main_~x~0_BEFORE_CALL_475 v_main_~y~0_BEFORE_CALL_419) v_main_~a~0_BEFORE_CALL_207)) (not (= (+ v_main_~x~0_BEFORE_CALL_475 .cse0) v_main_~a~0_BEFORE_CALL_207)) (< 0 v_main_~a~0_BEFORE_CALL_207) (< (* v_main_~y~0_BEFORE_CALL_419 v_main_~y~0_BEFORE_CALL_419) 2147483647) (< v_main_~a~0_BEFORE_CALL_207 v_main_~y~0_BEFORE_CALL_419)))) (= |c___VERIFIER_assert_#in~cond| 0))) is different from false [2021-05-02 15:08:55,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:55,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:59,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:11,303 WARN L205 SmtUtils]: Spent 10.12 s on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 15:09:11,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:11,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:13,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:15,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:17,453 WARN L838 $PredicateComparison]: unable to prove that (exists ((main_~q~0 Int) (v_main_~y~0_BEFORE_CALL_419 Int) (v_main_~x~0_BEFORE_CALL_475 Int) (v_main_~r~0_BEFORE_CALL_326 Int) (v_main_~a~0_BEFORE_CALL_207 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326))) (and (<= v_main_~x~0_BEFORE_CALL_475 50) (= (+ (* main_~q~0 v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326) (* main_~q~0 v_main_~x~0_BEFORE_CALL_475) v_main_~y~0_BEFORE_CALL_419) 0) (<= 0 v_main_~x~0_BEFORE_CALL_475) (= (+ (* v_main_~y~0_BEFORE_CALL_419 v_main_~a~0_BEFORE_CALL_207) v_main_~x~0_BEFORE_CALL_475 .cse0) (+ (* v_main_~y~0_BEFORE_CALL_419 v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326) (* v_main_~x~0_BEFORE_CALL_475 v_main_~y~0_BEFORE_CALL_419) v_main_~a~0_BEFORE_CALL_207)) (not (= (+ v_main_~x~0_BEFORE_CALL_475 .cse0) v_main_~a~0_BEFORE_CALL_207)) (< 0 v_main_~a~0_BEFORE_CALL_207) (< (* v_main_~y~0_BEFORE_CALL_419 v_main_~y~0_BEFORE_CALL_419) 2147483647) (< v_main_~a~0_BEFORE_CALL_207 v_main_~y~0_BEFORE_CALL_419)))) is different from false [2021-05-02 15:09:19,473 WARN L860 $PredicateComparison]: unable to prove that (exists ((main_~q~0 Int) (v_main_~y~0_BEFORE_CALL_419 Int) (v_main_~x~0_BEFORE_CALL_475 Int) (v_main_~r~0_BEFORE_CALL_326 Int) (v_main_~a~0_BEFORE_CALL_207 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326))) (and (<= v_main_~x~0_BEFORE_CALL_475 50) (= (+ (* main_~q~0 v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326) (* main_~q~0 v_main_~x~0_BEFORE_CALL_475) v_main_~y~0_BEFORE_CALL_419) 0) (<= 0 v_main_~x~0_BEFORE_CALL_475) (= (+ (* v_main_~y~0_BEFORE_CALL_419 v_main_~a~0_BEFORE_CALL_207) v_main_~x~0_BEFORE_CALL_475 .cse0) (+ (* v_main_~y~0_BEFORE_CALL_419 v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326) (* v_main_~x~0_BEFORE_CALL_475 v_main_~y~0_BEFORE_CALL_419) v_main_~a~0_BEFORE_CALL_207)) (not (= (+ v_main_~x~0_BEFORE_CALL_475 .cse0) v_main_~a~0_BEFORE_CALL_207)) (< 0 v_main_~a~0_BEFORE_CALL_207) (< (* v_main_~y~0_BEFORE_CALL_419 v_main_~y~0_BEFORE_CALL_419) 2147483647) (< v_main_~a~0_BEFORE_CALL_207 v_main_~y~0_BEFORE_CALL_419)))) is different from true [2021-05-02 15:09:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 176 proven. 59 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2021-05-02 15:09:19,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:09:19,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606253677] [2021-05-02 15:09:19,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:09:19,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446833787] [2021-05-02 15:09:19,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446833787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:09:19,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:09:19,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 15:09:19,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869788457] [2021-05-02 15:09:19,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 15:09:19,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:09:19,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 15:09:19,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=307, Unknown=10, NotChecked=74, Total=462 [2021-05-02 15:09:19,475 INFO L87 Difference]: Start difference. First operand 697 states and 953 transitions. Second operand has 22 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 15:09:41,763 WARN L205 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-02 15:10:11,049 WARN L205 SmtUtils]: Spent 8.73 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-02 15:10:37,799 WARN L205 SmtUtils]: Spent 16.93 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-02 15:11:12,869 WARN L205 SmtUtils]: Spent 25.75 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-02 15:12:00,391 WARN L205 SmtUtils]: Spent 33.38 s on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-02 15:12:11,909 WARN L838 $PredicateComparison]: unable to prove that (and (= (+ c_main_~x~0 (* c_main_~y~0 c_main_~r~0) (* c_main_~y~0 c_main_~a~0)) (+ (* c_main_~x~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~r~0) c_main_~a~0)) (< (* c_main_~y~0 c_main_~y~0) 2147483647) (< c_main_~a~0 c_main_~y~0) (<= 0 c_main_~x~0) (= c_main_~s~0 (+ (* c_main_~q~0 c_main_~r~0) 1)) (<= c_main_~x~0 50) (< c_main_~b~0 c_main_~a~0) (<= 0 c_main_~b~0) (= c_main_~p~0 1) (< 0 c_main_~a~0) (exists ((main_~q~0 Int)) (= (+ c_main_~y~0 (* c_main_~x~0 main_~q~0) (* c_main_~y~0 main_~q~0 c_main_~r~0)) 0))) is different from false [2021-05-02 15:12:30,434 WARN L205 SmtUtils]: Spent 11.09 s on a formula simplification that was a NOOP. DAG size: 39